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<title>src/full/Agda/TypeChecking/Rules/Term.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP, PatternGuards, TupleSections #-}</span>
<a name="line-2"></a>
<a name="line-3"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Rules</span><span class='hs-varop'>.</span><span class='hs-conid'>Term</span> <span class='hs-keyword'>where</span>
<a name="line-4"></a>
<a name="line-5"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span>
<a name="line-6"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Arrow</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>***</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-layout'>(</span><span class='hs-varop'>&&&</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Trans</span>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Reader</span>
<a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-varid'>sort</span><span class='hs-layout'>)</span>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Map</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Map</span>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Set</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Set</span>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Traversable</span> <span class='hs-layout'>(</span><span class='hs-varid'>traverse</span><span class='hs-layout'>,</span><span class='hs-varid'>sequenceA</span><span class='hs-layout'>)</span>
<a name="line-15"></a>
<a name="line-16"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Interaction</span><span class='hs-varop'>.</span><span class='hs-conid'>Options</span>
<a name="line-17"></a>
<a name="line-18"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Abstract</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>A</span>
<a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Abstract</span><span class='hs-varop'>.</span><span class='hs-conid'>Views</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>A</span>
<a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Info</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>A</span>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Concrete</span><span class='hs-varop'>.</span><span class='hs-conid'>Pretty</span> <span class='hs-conid'>()</span> <span class='hs-comment'>-- only Pretty instances</span>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Concrete</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>C</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Common</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Translation</span><span class='hs-varop'>.</span><span class='hs-conid'>AbstractToConcrete</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Concrete</span><span class='hs-varop'>.</span><span class='hs-conid'>Pretty</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Fixity</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Position</span>
<a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Literal</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Abstract</span><span class='hs-varop'>.</span><span class='hs-conid'>Views</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Scope</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span> <span class='hs-layout'>(</span><span class='hs-varid'>emptyScopeInfo</span><span class='hs-layout'>)</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Translation</span><span class='hs-varop'>.</span><span class='hs-conid'>InternalToAbstract</span> <span class='hs-layout'>(</span><span class='hs-varid'>reify</span><span class='hs-layout'>)</span>
<a name="line-33"></a>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-35"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Builtin</span>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Substitute</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Reduce</span>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>MetaVars</span>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Pretty</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Records</span>
<a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>RecordPatterns</span>
<a name="line-42"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Conversion</span>
<a name="line-43"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Implicit</span> <span class='hs-layout'>(</span><span class='hs-varid'>implicitArgs</span><span class='hs-layout'>)</span>
<a name="line-44"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>InstanceArguments</span>
<a name="line-45"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Primitive</span>
<a name="line-46"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Constraints</span>
<a name="line-47"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Free</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-conid'>Occurrence</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-48"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Telescope</span>
<a name="line-49"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Datatypes</span>
<a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Irrelevance</span>
<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>EtaContract</span>
<a name="line-52"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Quote</span>
<a name="line-53"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>CompiledClause</span>
<a name="line-54"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Level</span>
<a name="line-55"></a><span class='hs-keyword'>import</span> <span class='hs-comment'>{-# SOURCE #-}</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Rules</span><span class='hs-varop'>.</span><span class='hs-conid'>Builtin</span><span class='hs-varop'>.</span><span class='hs-conid'>Coinduction</span>
<a name="line-56"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Rules</span><span class='hs-varop'>.</span><span class='hs-conid'>LHS</span> <span class='hs-layout'>(</span><span class='hs-varid'>checkLeftHandSide</span><span class='hs-layout'>)</span>
<a name="line-57"></a>
<a name="line-58"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Fresh</span>
<a name="line-59"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Tuple</span>
<a name="line-60"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Permutation</span>
<a name="line-61"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>zipWithTails</span><span class='hs-layout'>)</span>
<a name="line-62"></a>
<a name="line-63"></a><span class='hs-keyword'>import</span> <span class='hs-comment'>{-# SOURCE #-}</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Empty</span> <span class='hs-layout'>(</span><span class='hs-varid'>isEmptyType</span><span class='hs-layout'>)</span>
<a name="line-64"></a><span class='hs-keyword'>import</span> <span class='hs-comment'>{-# SOURCE #-}</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Rules</span><span class='hs-varop'>.</span><span class='hs-conid'>Decl</span> <span class='hs-layout'>(</span><span class='hs-varid'>checkSectionApplication</span><span class='hs-layout'>)</span>
<a name="line-65"></a><span class='hs-keyword'>import</span> <span class='hs-comment'>{-# SOURCE #-}</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Rules</span><span class='hs-varop'>.</span><span class='hs-conid'>Def</span> <span class='hs-layout'>(</span><span class='hs-varid'>checkFunDef</span><span class='hs-layout'>,</span><span class='hs-varid'>checkFunDef'</span><span class='hs-layout'>)</span>
<a name="line-66"></a>
<a name="line-67"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-68"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Size</span>
<a name="line-69"></a>
<a name="line-70"></a><span class='hs-cpp'>#include "../../undefined.h"</span>
<a name="line-71"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>Impossible</span>
<a name="line-72"></a>
<a name="line-73"></a><span class='hs-comment'>---------------------------------------------------------------------------</span>
<a name="line-74"></a><span class='hs-comment'>-- * Types</span>
<a name="line-75"></a><span class='hs-comment'>---------------------------------------------------------------------------</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="isType"></a><span class='hs-comment'>-- | Check that an expression is a type.</span>
<a name="line-78"></a><span class='hs-definition'>isType</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Sort</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Type</span>
<a name="line-79"></a><span class='hs-definition'>isType</span> <span class='hs-varid'>e</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span>
<a name="line-80"></a> <span class='hs-varid'>traceCall</span> <span class='hs-layout'>(</span><span class='hs-conid'>IsTypeCall</span> <span class='hs-varid'>e</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-81"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-varid'>sort</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-82"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>El</span> <span class='hs-varid'>s</span> <span class='hs-varid'>v</span>
<a name="line-83"></a>
<a name="line-84"></a><a name="isType_"></a><span class='hs-comment'>-- | Check that an expression is a type without knowing the sort.</span>
<a name="line-85"></a><span class='hs-definition'>isType_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Type</span>
<a name="line-86"></a><span class='hs-definition'>isType_</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span>
<a name="line-87"></a> <span class='hs-varid'>traceCall</span> <span class='hs-layout'>(</span><span class='hs-conid'>IsType_</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sharedType</span> <span class='hs-varop'><$></span>
<a name="line-88"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>unScope</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-89"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Fun</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-90"></a> <span class='hs-varid'>a</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>Dom</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-varop'><$></span> <span class='hs-varid'>isType_</span> <span class='hs-varid'>t</span>
<a name="line-91"></a> <span class='hs-varid'>b</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isType_</span> <span class='hs-varid'>b</span>
<a name="line-92"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>El</span> <span class='hs-layout'>(</span><span class='hs-varid'>sLub</span> <span class='hs-layout'>(</span><span class='hs-varid'>getSort</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unDom</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>getSort</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pi</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>NoAbs</span> <span class='hs-str'>"_"</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-93"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Pi</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-94"></a> <span class='hs-varid'>checkTelescope_</span> <span class='hs-varid'>tel</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>tel</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-95"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instantiateFull</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>isType_</span> <span class='hs-varid'>e</span>
<a name="line-96"></a> <span class='hs-varid'>tel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instantiateFull</span> <span class='hs-varid'>tel</span>
<a name="line-97"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>telePi</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>t</span>
<a name="line-98"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Set</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-99"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ifM</span> <span class='hs-varid'>typeInType</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-100"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sort</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkType</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-101"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>App</span> <span class='hs-varid'>i</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-conid'>NotHidden</span> <span class='hs-varid'>r</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-102"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Set</span> <span class='hs-keyword'>_</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>unScope</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span>
<a name="line-103"></a> <span class='hs-varid'>ifM</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'><$></span> <span class='hs-varid'>hasUniversePolymorphism</span><span class='hs-layout'>)</span>
<a name="line-104"></a> <span class='hs-layout'>(</span><span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-str'>"Use --universe-polymorphism to enable level arguments to Set"</span><span class='hs-layout'>)</span>
<a name="line-105"></a> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-106"></a> <span class='hs-varid'>lvl</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>primLevel</span>
<a name="line-107"></a> <span class='hs-comment'>-- allow NonStrict variables when checking level</span>
<a name="line-108"></a> <span class='hs-comment'>-- Set : (NonStrict) Level -> Set\omega</span>
<a name="line-109"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>levelView</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>applyRelevanceToContext</span> <span class='hs-conid'>NonStrict</span>
<a name="line-110"></a> <span class='hs-layout'>(</span><span class='hs-varid'>checkExpr</span> <span class='hs-layout'>(</span><span class='hs-varid'>namedThing</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>El</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkType</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varid'>lvl</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-111"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sort</span> <span class='hs-layout'>(</span><span class='hs-conid'>Type</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-112"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-113"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>workOnTypes</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newSortMeta</span>
<a name="line-114"></a> <span class='hs-varid'>isType</span> <span class='hs-varid'>e</span> <span class='hs-varid'>s</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="isTypeEqualTo"></a><span class='hs-comment'>-- | Check that an expression is a type which is equal to a given type.</span>
<a name="line-117"></a><span class='hs-definition'>isTypeEqualTo</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Type</span>
<a name="line-118"></a><span class='hs-definition'>isTypeEqualTo</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-119"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ScopedExpr</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>isTypeEqualTo</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span>
<a name="line-120"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Underscore</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaNumber</span> <span class='hs-varid'>i</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>t</span>
<a name="line-121"></a> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>workOnTypes</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-122"></a> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isType</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-varid'>getSort</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-123"></a> <span class='hs-varid'>t'</span> <span class='hs-varop'><$</span> <span class='hs-varid'>leqType</span> <span class='hs-varid'>t</span> <span class='hs-varid'>t'</span>
<a name="line-124"></a>
<a name="line-125"></a><a name="leqType_"></a><span class='hs-definition'>leqType_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>()</span>
<a name="line-126"></a><span class='hs-definition'>leqType_</span> <span class='hs-varid'>t</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>workOnTypes</span> <span class='hs-varop'>$</span> <span class='hs-varid'>leqType</span> <span class='hs-varid'>t</span> <span class='hs-varid'>t'</span>
<a name="line-127"></a>
<a name="line-128"></a><span class='hs-comment'>{- UNUSED
<a name="line-129"></a>-- | Force a type to be a Pi. Instantiates if necessary. The 'Hiding' is only
<a name="line-130"></a>-- used when instantiating a meta variable.
<a name="line-131"></a>
<a name="line-132"></a>forcePi :: Hiding -> String -> Type -> TCM (Type, Constraints)
<a name="line-133"></a>forcePi h name (El s t) =
<a name="line-134"></a> do t' <- reduce t
<a name="line-135"></a> case t' of
<a name="line-136"></a> Pi _ _ -> return (El s t', [])
<a name="line-137"></a> _ -> do
<a name="line-138"></a> sa <- newSortMeta
<a name="line-139"></a> sb <- newSortMeta
<a name="line-140"></a> let s' = sLub sa sb
<a name="line-141"></a>
<a name="line-142"></a> a <- newTypeMeta sa
<a name="line-143"></a> x <- freshName_ name
<a name="line-144"></a> let arg = Arg h Relevant a
<a name="line-145"></a> b <- addCtx x arg $ newTypeMeta sb
<a name="line-146"></a> let ty = El s' $ Pi arg (Abs (show x) b)
<a name="line-147"></a> cs <- equalType (El s t') ty
<a name="line-148"></a> ty' <- reduce ty
<a name="line-149"></a> return (ty', cs)
<a name="line-150"></a>-}</span>
<a name="line-151"></a>
<a name="line-152"></a><span class='hs-comment'>---------------------------------------------------------------------------</span>
<a name="line-153"></a><span class='hs-comment'>-- * Telescopes</span>
<a name="line-154"></a><span class='hs-comment'>---------------------------------------------------------------------------</span>
<a name="line-155"></a>
<a name="line-156"></a><a name="checkTelescope_"></a><span class='hs-comment'>-- | Type check a telescope. Binds the variables defined by the telescope.</span>
<a name="line-157"></a><span class='hs-definition'>checkTelescope_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Telescope</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Telescope</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span>
<a name="line-158"></a><span class='hs-definition'>checkTelescope_</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>ret</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ret</span> <span class='hs-conid'>EmptyTel</span>
<a name="line-159"></a><span class='hs-definition'>checkTelescope_</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-conop'>:</span> <span class='hs-varid'>tel</span><span class='hs-layout'>)</span> <span class='hs-varid'>ret</span> <span class='hs-keyglyph'>=</span>
<a name="line-160"></a> <span class='hs-varid'>checkTypedBindings_</span> <span class='hs-varid'>b</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>tel1</span> <span class='hs-keyglyph'>-></span>
<a name="line-161"></a> <span class='hs-varid'>checkTelescope_</span> <span class='hs-varid'>tel</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>tel2</span> <span class='hs-keyglyph'>-></span>
<a name="line-162"></a> <span class='hs-varid'>ret</span> <span class='hs-varop'>$</span> <span class='hs-varid'>abstract</span> <span class='hs-varid'>tel1</span> <span class='hs-varid'>tel2</span>
<a name="line-163"></a>
<a name="line-164"></a><a name="checkTypedBindings_"></a><span class='hs-comment'>-- | Check a typed binding and extends the context with the bound variables.</span>
<a name="line-165"></a><span class='hs-comment'>-- The telescope passed to the continuation is valid in the original context.</span>
<a name="line-166"></a><span class='hs-definition'>checkTypedBindings_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TypedBindings</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Telescope</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span>
<a name="line-167"></a><span class='hs-definition'>checkTypedBindings_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkTypedBindings</span> <span class='hs-conid'>PiNotLam</span>
<a name="line-168"></a>
<a name="line-169"></a><a name="LamOrPi"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>LamOrPi</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LamNotPi</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PiNotLam</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-170"></a>
<a name="line-171"></a><a name="checkTypedBindings"></a><span class='hs-comment'>-- | Check a typed binding and extends the context with the bound variables.</span>
<a name="line-172"></a><span class='hs-comment'>-- The telescope passed to the continuation is valid in the original context.</span>
<a name="line-173"></a><span class='hs-comment'>--</span>
<a name="line-174"></a><span class='hs-comment'>-- Parametrized by a flag wether we check a typed lambda or a Pi. This flag</span>
<a name="line-175"></a><span class='hs-comment'>-- is needed for irrelevance.</span>
<a name="line-176"></a><span class='hs-definition'>checkTypedBindings</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>LamOrPi</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TypedBindings</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Telescope</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span>
<a name="line-177"></a><span class='hs-definition'>checkTypedBindings</span> <span class='hs-varid'>lamOrPi</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TypedBindings</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ret</span> <span class='hs-keyglyph'>=</span>
<a name="line-178"></a> <span class='hs-varid'>checkTypedBinding</span> <span class='hs-varid'>lamOrPi</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>b</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>bs</span> <span class='hs-keyglyph'>-></span>
<a name="line-179"></a> <span class='hs-varid'>ret</span> <span class='hs-varop'>$</span> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ExtendTel</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Abs</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-conid'>EmptyTel</span> <span class='hs-varid'>bs</span>
<a name="line-180"></a>
<a name="line-181"></a><a name="checkTypedBinding"></a><span class='hs-definition'>checkTypedBinding</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>LamOrPi</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Hiding</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Relevance</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TypedBinding</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>String</span><span class='hs-layout'>,</span><span class='hs-conid'>Type</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span>
<a name="line-182"></a><span class='hs-definition'>checkTypedBinding</span> <span class='hs-varid'>lamOrPi</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TBind</span> <span class='hs-varid'>i</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>ret</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-183"></a> <span class='hs-comment'>-- Andreas, 2011-04-26 irrelevant function arguments may appear</span>
<a name="line-184"></a> <span class='hs-comment'>-- non-strictly in the codomain type</span>
<a name="line-185"></a> <span class='hs-comment'>-- 2011-10-04 if flag --experimental-irrelevance is set</span>
<a name="line-186"></a> <span class='hs-varid'>allowed</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>optExperimentalIrrelevance</span> <span class='hs-varop'><$></span> <span class='hs-varid'>pragmaOptions</span>
<a name="line-187"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>modEnv</span> <span class='hs-varid'>lamOrPi</span> <span class='hs-varid'>allowed</span> <span class='hs-varop'>$</span> <span class='hs-varid'>isType_</span> <span class='hs-varid'>e</span>
<a name="line-188"></a> <span class='hs-varid'>addCtxs</span> <span class='hs-varid'>xs</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-varid'>modRel</span> <span class='hs-varid'>lamOrPi</span> <span class='hs-varid'>allowed</span> <span class='hs-varid'>rel</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ret</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mkTel</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>t</span>
<a name="line-189"></a> <span class='hs-keyword'>where</span>
<a name="line-190"></a> <span class='hs-comment'>-- if we are checking a typed lambda, we resurrect before we check the</span>
<a name="line-191"></a> <span class='hs-comment'>-- types, but do not modify the new context entries</span>
<a name="line-192"></a> <span class='hs-comment'>-- otherwise, if we are checking a pi, we do not resurrect, but</span>
<a name="line-193"></a> <span class='hs-comment'>-- modify the new context entries</span>
<a name="line-194"></a> <span class='hs-varid'>modEnv</span> <span class='hs-conid'>LamNotPi</span> <span class='hs-conid'>True</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doWorkOnTypes</span>
<a name="line-195"></a> <span class='hs-varid'>modEnv</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-196"></a> <span class='hs-varid'>modRel</span> <span class='hs-conid'>PiNotLam</span> <span class='hs-conid'>True</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>irrToNonStrict</span>
<a name="line-197"></a> <span class='hs-varid'>modRel</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-198"></a> <span class='hs-varid'>mkTel</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-199"></a> <span class='hs-varid'>mkTel</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-conop'>:</span><span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nameConcrete</span> <span class='hs-varid'>x</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>mkTel</span> <span class='hs-varid'>xs</span> <span class='hs-layout'>(</span><span class='hs-varid'>raise</span> <span class='hs-num'>1</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-200"></a><span class='hs-definition'>checkTypedBinding</span> <span class='hs-varid'>lamOrPi</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TNoBind</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>ret</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-201"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isType_</span> <span class='hs-varid'>e</span>
<a name="line-202"></a> <span class='hs-varid'>ret</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-str'>"_"</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-203"></a>
<a name="line-204"></a><a name="checkLambda"></a><span class='hs-comment'>-- | Type check a lambda expression.</span>
<a name="line-205"></a><span class='hs-definition'>checkLambda</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Arg</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TypedBinding</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span>
<a name="line-206"></a><span class='hs-definition'>checkLambda</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TNoBind</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-207"></a><span class='hs-definition'>checkLambda</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TBind</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>typ</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>body</span> <span class='hs-varid'>target</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-208"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>numbinds</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>xs</span>
<a name="line-209"></a> <span class='hs-conid'>TelV</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>btyp</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>telViewUpTo</span> <span class='hs-varid'>numbinds</span> <span class='hs-varid'>target</span>
<a name="line-210"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>size</span> <span class='hs-varid'>tel</span> <span class='hs-varop'><</span> <span class='hs-varid'>size</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>||</span> <span class='hs-varid'>numbinds</span> <span class='hs-varop'>/=</span> <span class='hs-num'>1</span>
<a name="line-211"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>dontUseTargetType</span>
<a name="line-212"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>useTargetType</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>btyp</span>
<a name="line-213"></a> <span class='hs-keyword'>where</span>
<a name="line-214"></a> <span class='hs-varid'>dontUseTargetType</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-215"></a> <span class='hs-comment'>-- Checking λ (xs : argsT) → body : target</span>
<a name="line-216"></a> <span class='hs-varid'>verboseS</span> <span class='hs-str'>"tc.term.lambda"</span> <span class='hs-num'>5</span> <span class='hs-varop'>$</span> <span class='hs-varid'>tick</span> <span class='hs-str'>"lambda-no-target-type"</span>
<a name="line-217"></a>
<a name="line-218"></a> <span class='hs-comment'>-- First check that argsT is a valid type</span>
<a name="line-219"></a> <span class='hs-varid'>argsT</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>workOnTypes</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Dom</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-varop'><$></span> <span class='hs-varid'>isType_</span> <span class='hs-varid'>typ</span>
<a name="line-220"></a>
<a name="line-221"></a> <span class='hs-comment'>-- In order to have as much type information as possible when checking</span>
<a name="line-222"></a> <span class='hs-comment'>-- body, we first unify (xs : argsT) → ?t₁ with the target type. If this</span>
<a name="line-223"></a> <span class='hs-comment'>-- is inconclusive we need to block the resulting term so we create a</span>
<a name="line-224"></a> <span class='hs-comment'>-- fresh problem for the check.</span>
<a name="line-225"></a> <span class='hs-varid'>t1</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>addCtxs</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>argsT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>workOnTypes</span> <span class='hs-varid'>newTypeMeta_</span>
<a name="line-226"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>tel</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>telFromList</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mkTel</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>argsT</span>
<a name="line-227"></a> <span class='hs-comment'>-- Do not coerce hidden lambdas</span>
<a name="line-228"></a> <span class='hs-keyword'>if</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>NotHidden</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span> <span class='hs-keyword'>do</span>
<a name="line-229"></a> <span class='hs-varid'>pid</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newProblem_</span> <span class='hs-varop'>$</span> <span class='hs-varid'>leqType</span> <span class='hs-layout'>(</span><span class='hs-varid'>telePi</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-varid'>target</span>
<a name="line-230"></a> <span class='hs-comment'>-- Now check body : ?t₁</span>
<a name="line-231"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>addCtxs</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>argsT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>body</span> <span class='hs-varid'>t1</span>
<a name="line-232"></a> <span class='hs-comment'>-- Block on the type comparison</span>
<a name="line-233"></a> <span class='hs-varid'>blockTermOnProblem</span> <span class='hs-varid'>target</span> <span class='hs-layout'>(</span><span class='hs-varid'>teleLam</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-varid'>pid</span>
<a name="line-234"></a> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-235"></a> <span class='hs-comment'>-- Now check body : ?t₁</span>
<a name="line-236"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>addCtxs</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>argsT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>body</span> <span class='hs-varid'>t1</span>
<a name="line-237"></a> <span class='hs-comment'>-- Block on the type comparison</span>
<a name="line-238"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-varid'>teleLam</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>telePi</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-varid'>target</span>
<a name="line-239"></a>
<a name="line-240"></a> <span class='hs-varid'>useTargetType</span> <span class='hs-varid'>tel</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>ExtendTel</span> <span class='hs-varid'>arg</span> <span class='hs-layout'>(</span><span class='hs-conid'>Abs</span> <span class='hs-varid'>y</span> <span class='hs-conid'>EmptyTel</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>btyp</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-241"></a> <span class='hs-varid'>verboseS</span> <span class='hs-str'>"tc.term.lambda"</span> <span class='hs-num'>5</span> <span class='hs-varop'>$</span> <span class='hs-varid'>tick</span> <span class='hs-str'>"lambda-with-target-type"</span>
<a name="line-242"></a> <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>domHiding</span> <span class='hs-varid'>arg</span> <span class='hs-varop'>==</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>WrongHidingInLambda</span> <span class='hs-varid'>target</span>
<a name="line-243"></a> <span class='hs-comment'>-- Andreas, 2011-10-01 ignore relevance in lambda if not explicitly given</span>
<a name="line-244"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>r'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>domRelevance</span> <span class='hs-varid'>arg</span> <span class='hs-comment'>-- relevance of function type</span>
<a name="line-245"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>r</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Irrelevant</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>r'</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>WrongIrrelevanceInLambda</span> <span class='hs-varid'>target</span>
<a name="line-246"></a><span class='hs-comment'>-- unless (argRelevance arg == r) $ typeError $ WrongIrrelevanceInLambda target</span>
<a name="line-247"></a> <span class='hs-comment'>-- We only need to block the final term on the argument type</span>
<a name="line-248"></a> <span class='hs-comment'>-- comparison. The body will be blocked if necessary. We still want to</span>
<a name="line-249"></a> <span class='hs-comment'>-- compare the argument types first, so we spawn a new problem for that</span>
<a name="line-250"></a> <span class='hs-comment'>-- check.</span>
<a name="line-251"></a> <span class='hs-layout'>(</span><span class='hs-varid'>pid</span><span class='hs-layout'>,</span> <span class='hs-varid'>argT</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newProblem</span> <span class='hs-varop'>$</span> <span class='hs-varid'>isTypeEqualTo</span> <span class='hs-varid'>typ</span> <span class='hs-layout'>(</span><span class='hs-varid'>unDom</span> <span class='hs-varid'>arg</span><span class='hs-layout'>)</span>
<a name="line-252"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>add</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r'</span> <span class='hs-varid'>argT</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>body</span> <span class='hs-varid'>btyp</span>
<a name="line-253"></a> <span class='hs-varid'>blockTermOnProblem</span> <span class='hs-varid'>target</span> <span class='hs-layout'>(</span><span class='hs-conid'>Lam</span> <span class='hs-varid'>h</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Abs</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nameConcrete</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-varid'>pid</span>
<a name="line-254"></a> <span class='hs-keyword'>where</span>
<a name="line-255"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>xs</span>
<a name="line-256"></a> <span class='hs-varid'>add</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-varid'>isNoName</span> <span class='hs-layout'>(</span><span class='hs-varid'>nameConcrete</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addCtxString</span> <span class='hs-varid'>y</span>
<a name="line-257"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>addCtx</span> <span class='hs-varid'>x</span>
<a name="line-258"></a> <span class='hs-varid'>useTargetType</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-259"></a>
<a name="line-260"></a>
<a name="line-261"></a> <span class='hs-varid'>mkTel</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-262"></a> <span class='hs-varid'>mkTel</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>(,)</span> <span class='hs-varid'>s</span> <span class='hs-varop'><$></span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>mkTel</span> <span class='hs-varid'>xs</span> <span class='hs-layout'>(</span><span class='hs-varid'>raise</span> <span class='hs-num'>1</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-263"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nameConcrete</span> <span class='hs-varid'>x</span>
<a name="line-264"></a>
<a name="line-265"></a><span class='hs-comment'>---------------------------------------------------------------------------</span>
<a name="line-266"></a><span class='hs-comment'>-- * Literal</span>
<a name="line-267"></a><span class='hs-comment'>---------------------------------------------------------------------------</span>
<a name="line-268"></a>
<a name="line-269"></a><a name="checkLiteral"></a><span class='hs-definition'>checkLiteral</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Literal</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span>
<a name="line-270"></a><span class='hs-definition'>checkLiteral</span> <span class='hs-varid'>lit</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-271"></a> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>litType</span> <span class='hs-varid'>lit</span>
<a name="line-272"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Lit</span> <span class='hs-varid'>lit</span><span class='hs-layout'>)</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>t</span>
<a name="line-273"></a>
<a name="line-274"></a><span class='hs-comment'>-- moved to TypeChecking.Monad.Builtin to avoid import cycles:</span>
<a name="line-275"></a><span class='hs-comment'>-- litType :: Literal -> TCM Type</span>
<a name="line-276"></a>
<a name="line-277"></a><span class='hs-comment'>---------------------------------------------------------------------------</span>
<a name="line-278"></a><span class='hs-comment'>-- * Terms</span>
<a name="line-279"></a><span class='hs-comment'>---------------------------------------------------------------------------</span>
<a name="line-280"></a>
<a name="line-281"></a><a name="reduceCon"></a><span class='hs-comment'>-- TODO: move somewhere suitable</span>
<a name="line-282"></a><span class='hs-definition'>reduceCon</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>QName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>QName</span>
<a name="line-283"></a><span class='hs-definition'>reduceCon</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-284"></a> <span class='hs-conid'>Con</span> <span class='hs-varid'>c</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'><$></span> <span class='hs-layout'>(</span><span class='hs-varid'>constructorForm</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>reduce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Con</span> <span class='hs-varid'>c</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-285"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>c</span>
<a name="line-286"></a>
<a name="line-287"></a><a name="checkArguments'"></a><span class='hs-comment'>-- | @checkArguments' exph r args t0 t e k@ tries @checkArguments exph args t0 t@.</span>
<a name="line-288"></a><span class='hs-comment'>-- If it succeeds, it continues @k@ with the returned results. If it fails,</span>
<a name="line-289"></a><span class='hs-comment'>-- it registers a postponed typechecking problem and returns the resulting new</span>
<a name="line-290"></a><span class='hs-comment'>-- meta variable.</span>
<a name="line-291"></a><span class='hs-comment'>--</span>
<a name="line-292"></a><span class='hs-comment'>-- Checks @e := ((_ : t0) args) : t@.</span>
<a name="line-293"></a><span class='hs-definition'>checkArguments'</span> <span class='hs-keyglyph'>::</span>
<a name="line-294"></a> <span class='hs-conid'>ExpandHidden</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ExpandInstances</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>NamedArg</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span>
<a name="line-295"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Args</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span>
<a name="line-296"></a><span class='hs-definition'>checkArguments'</span> <span class='hs-varid'>exph</span> <span class='hs-varid'>expIFS</span> <span class='hs-varid'>r</span> <span class='hs-varid'>args</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>t</span> <span class='hs-varid'>e</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-297"></a> <span class='hs-varid'>z</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runErrorT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkArguments</span> <span class='hs-varid'>exph</span> <span class='hs-varid'>expIFS</span> <span class='hs-varid'>r</span> <span class='hs-varid'>args</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>t</span>
<a name="line-298"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>z</span> <span class='hs-keyword'>of</span>
<a name="line-299"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>vs</span><span class='hs-layout'>,</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>k</span> <span class='hs-varid'>vs</span> <span class='hs-varid'>t1</span>
<a name="line-300"></a> <span class='hs-comment'>-- vs = evaluated args</span>
<a name="line-301"></a> <span class='hs-comment'>-- t1 = remaining type (needs to be subtype of t)</span>
<a name="line-302"></a> <span class='hs-comment'>-- cs = new constraints</span>
<a name="line-303"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>t0</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>postponeTypeCheckingProblem</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-varid'>unblockedTester</span> <span class='hs-varid'>t0</span><span class='hs-layout'>)</span>
<a name="line-304"></a> <span class='hs-comment'>-- if unsuccessful, postpone checking e : t until t0 unblocks</span>
<a name="line-305"></a>
<a name="line-306"></a><a name="unScope"></a><span class='hs-definition'>unScope</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ScopedExpr</span> <span class='hs-varid'>scope</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unScope</span> <span class='hs-varid'>e</span>
<a name="line-307"></a><span class='hs-definition'>unScope</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>e</span>
<a name="line-308"></a>
<a name="line-309"></a><a name="checkExpr"></a><span class='hs-comment'>-- | Type check an expression.</span>
<a name="line-310"></a><span class='hs-definition'>checkExpr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span>
<a name="line-311"></a><span class='hs-definition'>checkExpr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span>
<a name="line-312"></a> <span class='hs-varid'>verboseBracket</span> <span class='hs-str'>"tc.term.expr.top"</span> <span class='hs-num'>5</span> <span class='hs-str'>"checkExpr"</span> <span class='hs-varop'>$</span>
<a name="line-313"></a> <span class='hs-varid'>traceCall</span> <span class='hs-layout'>(</span><span class='hs-conid'>CheckExpr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>localScope</span> <span class='hs-varop'>$</span> <span class='hs-varid'>shared</span> <span class='hs-varop'><$></span> <span class='hs-keyword'>do</span>
<a name="line-314"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.expr.top"</span> <span class='hs-num'>15</span> <span class='hs-varop'>$</span>
<a name="line-315"></a> <span class='hs-varid'>text</span> <span class='hs-str'>"Checking"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>sep</span>
<a name="line-316"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>fsep</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>e</span><span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>":"</span><span class='hs-layout'>,</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>]</span>
<a name="line-317"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"at "</span> <span class='hs-varop'><+></span> <span class='hs-layout'>(</span><span class='hs-varid'>text</span> <span class='hs-varop'>.</span> <span class='hs-varid'>show</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>getCurrentRange</span><span class='hs-layout'>)</span>
<a name="line-318"></a> <span class='hs-keyglyph'>]</span>
<a name="line-319"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.expr.top.detailed"</span> <span class='hs-num'>80</span> <span class='hs-varop'>$</span>
<a name="line-320"></a> <span class='hs-varid'>text</span> <span class='hs-str'>"Checking"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>fsep</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>e</span><span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>":"</span><span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>]</span>
<a name="line-321"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>reduce</span> <span class='hs-varid'>t</span>
<a name="line-322"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.expr.top"</span> <span class='hs-num'>15</span> <span class='hs-varop'>$</span>
<a name="line-323"></a> <span class='hs-varid'>text</span> <span class='hs-str'>" --> "</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t</span>
<a name="line-324"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>scopedExpr</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ScopedExpr</span> <span class='hs-varid'>scope</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>setScope</span> <span class='hs-varid'>scope</span> <span class='hs-varop'>>></span> <span class='hs-varid'>scopedExpr</span> <span class='hs-varid'>e</span>
<a name="line-325"></a> <span class='hs-varid'>scopedExpr</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>e</span>
<a name="line-326"></a>
<a name="line-327"></a> <span class='hs-varid'>unScope</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ScopedExpr</span> <span class='hs-varid'>scope</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unScope</span> <span class='hs-varid'>e</span>
<a name="line-328"></a> <span class='hs-varid'>unScope</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>e</span>
<a name="line-329"></a>
<a name="line-330"></a> <span class='hs-varid'>e</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>scopedExpr</span> <span class='hs-varid'>e</span>
<a name="line-331"></a>
<a name="line-332"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-333"></a> <span class='hs-comment'>-- Insert hidden lambda if appropriate</span>
<a name="line-334"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Pi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>t</span>
<a name="line-335"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>hiddenLambdaOrHole</span> <span class='hs-varid'>h</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-336"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>h</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>NotHidden</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-337"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>freshName</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>argName</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-338"></a> <span class='hs-varid'>reportSLn</span> <span class='hs-str'>"tc.term.expr.impl"</span> <span class='hs-num'>15</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Inserting implicit lambda"</span>
<a name="line-339"></a> <span class='hs-varid'>checkExpr</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Lam</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ExprRange</span> <span class='hs-varop'>$</span> <span class='hs-varid'>getRange</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>domainFree</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-340"></a> <span class='hs-keyword'>where</span>
<a name="line-341"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>rStart</span> <span class='hs-varop'>$</span> <span class='hs-varid'>getRange</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-342"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>noRange</span>
<a name="line-343"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>pos</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>posToRange</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>pos</span>
<a name="line-344"></a>
<a name="line-345"></a> <span class='hs-varid'>hiddenLambdaOrHole</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>AbsurdLam</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>h'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-varid'>h'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-346"></a> <span class='hs-varid'>hiddenLambdaOrHole</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ExtendedLam</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-347"></a> <span class='hs-varid'>hiddenLambdaOrHole</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ExtendedLam</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>cls</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>any</span> <span class='hs-varid'>hiddenLHS</span> <span class='hs-varid'>cls</span>
<a name="line-348"></a> <span class='hs-varid'>hiddenLambdaOrHole</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Lam</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>DomainFree</span> <span class='hs-varid'>h'</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-varid'>h'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-349"></a> <span class='hs-varid'>hiddenLambdaOrHole</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Lam</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>DomainFull</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TypedBindings</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>h'</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span>
<a name="line-350"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-varid'>h'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-351"></a> <span class='hs-varid'>hiddenLambdaOrHole</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>QuestionMark</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-352"></a> <span class='hs-varid'>hiddenLambdaOrHole</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-353"></a>
<a name="line-354"></a> <span class='hs-varid'>hiddenLHS</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Clause</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LHS</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LHSHead</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-conop'>:</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>elem</span> <span class='hs-layout'>(</span><span class='hs-varid'>argHiding</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Hidden</span><span class='hs-layout'>,</span> <span class='hs-conid'>Instance</span><span class='hs-keyglyph'>]</span>
<a name="line-355"></a> <span class='hs-varid'>hiddenLHS</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-356"></a>
<a name="line-357"></a> <span class='hs-comment'>-- a meta variable without arguments: type check directly for efficiency</span>
<a name="line-358"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>QuestionMark</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>checkMeta</span> <span class='hs-varid'>newQuestionMark</span> <span class='hs-varid'>t</span> <span class='hs-varid'>i</span>
<a name="line-359"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Underscore</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>checkMeta</span> <span class='hs-layout'>(</span><span class='hs-varid'>newValueMeta</span> <span class='hs-conid'>RunMetaOccursCheck</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span> <span class='hs-varid'>i</span>
<a name="line-360"></a>
<a name="line-361"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>WithApp</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>e</span> <span class='hs-varid'>es</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>NotImplemented</span> <span class='hs-str'>"type checking of with application"</span>
<a name="line-362"></a>
<a name="line-363"></a> <span class='hs-comment'>-- check |- Set l : t (requires universe polymorphism)</span>
<a name="line-364"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>App</span> <span class='hs-varid'>i</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-conid'>NotHidden</span> <span class='hs-varid'>r</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span>
<a name="line-365"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Set</span> <span class='hs-keyword'>_</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>unScope</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span>
<a name="line-366"></a> <span class='hs-varid'>ifM</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'><$></span> <span class='hs-varid'>hasUniversePolymorphism</span><span class='hs-layout'>)</span>
<a name="line-367"></a> <span class='hs-layout'>(</span><span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-str'>"Use --universe-polymorphism to enable level arguments to Set"</span><span class='hs-layout'>)</span>
<a name="line-368"></a> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-369"></a> <span class='hs-varid'>lvl</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>primLevel</span>
<a name="line-370"></a> <span class='hs-comment'>-- allow NonStrict variables when checking level</span>
<a name="line-371"></a> <span class='hs-comment'>-- Set : (NonStrict) Level -> Set\omega</span>
<a name="line-372"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>levelView</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>applyRelevanceToContext</span> <span class='hs-conid'>NonStrict</span>
<a name="line-373"></a> <span class='hs-layout'>(</span><span class='hs-varid'>checkExpr</span> <span class='hs-layout'>(</span><span class='hs-varid'>namedThing</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>El</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkType</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varid'>lvl</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-374"></a> <span class='hs-comment'>-- check that Set (l+1) <= t</span>
<a name="line-375"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.univ.poly"</span> <span class='hs-num'>10</span> <span class='hs-varop'>$</span>
<a name="line-376"></a> <span class='hs-varid'>text</span> <span class='hs-str'>"checking Set "</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>n</span> <span class='hs-varop'><+></span>
<a name="line-377"></a> <span class='hs-varid'>text</span> <span class='hs-str'>"against"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t</span>
<a name="line-378"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Sort</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Type</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>sort</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sSuc</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Type</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-379"></a>
<a name="line-380"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>App</span> <span class='hs-varid'>i</span> <span class='hs-varid'>q</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-conid'>NotHidden</span> <span class='hs-varid'>r</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-381"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Quote</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>unScope</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-382"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>quoted</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Def</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span>
<a name="line-383"></a> <span class='hs-varid'>quoted</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-layout'>(</span><span class='hs-conid'>AmbQ</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span>
<a name="line-384"></a> <span class='hs-varid'>quoted</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-layout'>(</span><span class='hs-conid'>AmbQ</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-varop'>$</span> <span class='hs-str'>"quote: Ambigous name: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>xs</span>
<a name="line-385"></a> <span class='hs-varid'>quoted</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ScopedExpr</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>quoted</span> <span class='hs-varid'>e</span>
<a name="line-386"></a> <span class='hs-varid'>quoted</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-varop'>$</span> <span class='hs-str'>"quote: not a defined name"</span>
<a name="line-387"></a> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>quoted</span> <span class='hs-layout'>(</span><span class='hs-varid'>namedThing</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-388"></a> <span class='hs-varid'>ty</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>qNameType</span>
<a name="line-389"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-varid'>quoteName</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>t</span>
<a name="line-390"></a>
<a name="line-391"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>QuoteTerm</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>unScope</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>-></span>
<a name="line-392"></a> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>et</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferExpr</span> <span class='hs-layout'>(</span><span class='hs-varid'>namedThing</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-393"></a> <span class='hs-varid'>q</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>quoteTerm</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>normalise</span> <span class='hs-varid'>et</span>
<a name="line-394"></a> <span class='hs-varid'>ty</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>el</span> <span class='hs-varid'>primAgdaTerm</span>
<a name="line-395"></a> <span class='hs-varid'>coerce</span> <span class='hs-varid'>q</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>t</span>
<a name="line-396"></a>
<a name="line-397"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Unquote</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>unScope</span> <span class='hs-varid'>q</span> <span class='hs-keyglyph'>-></span>
<a name="line-398"></a> <span class='hs-keyword'>do</span> <span class='hs-varid'>e1</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkExpr</span> <span class='hs-layout'>(</span><span class='hs-varid'>namedThing</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>el</span> <span class='hs-varid'>primAgdaTerm</span>
<a name="line-399"></a> <span class='hs-varid'>e2</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>unquote</span> <span class='hs-varid'>e1</span>
<a name="line-400"></a> <span class='hs-varid'>checkTerm</span> <span class='hs-varid'>e2</span> <span class='hs-varid'>t</span>
<a name="line-401"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Quote</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-str'>"quote must be applied to a defined name"</span>
<a name="line-402"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>QuoteTerm</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-str'>"quoteTerm must be applied to a term"</span>
<a name="line-403"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Unquote</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-str'>"unquote must be applied to a term"</span>
<a name="line-404"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>AbsurdLam</span> <span class='hs-varid'>i</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-405"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instantiateFull</span> <span class='hs-varid'>t</span>
<a name="line-406"></a> <span class='hs-varid'>ifBlockedType</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-varid'>m</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>postponeTypeCheckingProblem_</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-407"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>t'</span> <span class='hs-keyword'>of</span>
<a name="line-408"></a> <span class='hs-conid'>Pi</span> <span class='hs-varid'>dom</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-varid'>h'</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span>
<a name="line-409"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-varid'>h'</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>null</span> <span class='hs-varop'>$</span> <span class='hs-varid'>allMetas</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-410"></a> <span class='hs-varid'>postponeTypeCheckingProblem</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t'</span> <span class='hs-varop'>$</span>
<a name="line-411"></a> <span class='hs-varid'>null</span> <span class='hs-varop'>.</span> <span class='hs-varid'>allMetas</span> <span class='hs-varop'><$></span> <span class='hs-varid'>instantiateFull</span> <span class='hs-varid'>a</span>
<a name="line-412"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-varid'>h'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>blockTerm</span> <span class='hs-varid'>t'</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-413"></a> <span class='hs-varid'>isEmptyType</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span>
<a name="line-414"></a> <span class='hs-comment'>-- Add helper function</span>
<a name="line-415"></a> <span class='hs-varid'>top</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>currentModule</span>
<a name="line-416"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"absurd"</span>
<a name="line-417"></a> <span class='hs-varid'>aux</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>qualify</span> <span class='hs-varid'>top</span> <span class='hs-varop'><$></span> <span class='hs-varid'>freshName</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>name</span>
<a name="line-418"></a> <span class='hs-comment'>-- if we are in irrelevant position, the helper function</span>
<a name="line-419"></a> <span class='hs-comment'>-- is added as irrelevant</span>
<a name="line-420"></a> <span class='hs-varid'>rel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>envRelevance</span>
<a name="line-421"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.absurd"</span> <span class='hs-num'>10</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-422"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"Adding absurd function"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>rel</span> <span class='hs-varop'><></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>aux</span>
<a name="line-423"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"of type"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t'</span>
<a name="line-424"></a> <span class='hs-keyglyph'>]</span>
<a name="line-425"></a> <span class='hs-varid'>addConstant</span> <span class='hs-varid'>aux</span>
<a name="line-426"></a> <span class='hs-varop'>$</span> <span class='hs-conid'>Defn</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>aux</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Nonvariant</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Unused</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultDisplayForm</span> <span class='hs-varid'>aux</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span> <span class='hs-varid'>noCompiledRep</span>
<a name="line-427"></a> <span class='hs-varop'>$</span> <span class='hs-conid'>Function</span>
<a name="line-428"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>funClauses</span> <span class='hs-keyglyph'>=</span>
<a name="line-429"></a> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Clause</span>
<a name="line-430"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>clauseRange</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getRange</span> <span class='hs-varid'>e</span>
<a name="line-431"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>clauseTel</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EmptyTel</span> <span class='hs-comment'>-- telFromList [fmap ("()",) dom]</span>
<a name="line-432"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>clausePerm</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Perm</span> <span class='hs-num'>1</span> <span class='hs-conid'>[]</span> <span class='hs-comment'>-- Perm 1 [0]</span>
<a name="line-433"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>clausePats</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-varop'>$</span> <span class='hs-conid'>VarP</span> <span class='hs-str'>"()"</span><span class='hs-keyglyph'>]</span>
<a name="line-434"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>clauseBody</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Bind</span> <span class='hs-varop'>$</span> <span class='hs-conid'>NoAbs</span> <span class='hs-str'>"()"</span> <span class='hs-conid'>NoBody</span>
<a name="line-435"></a> <span class='hs-layout'>}</span>
<a name="line-436"></a> <span class='hs-keyglyph'>]</span>
<a name="line-437"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>funCompiled</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Fail</span>
<a name="line-438"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>funDelayed</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NotDelayed</span>
<a name="line-439"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>funInv</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NotInjective</span>
<a name="line-440"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>funAbstr</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ConcreteDef</span>
<a name="line-441"></a><span class='hs-comment'>{-
<a name="line-442"></a> , funPolarity = [Nonvariant] -- WAS: [Covariant]
<a name="line-443"></a> , funArgOccurrences = [Unused]
<a name="line-444"></a>-}</span>
<a name="line-445"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>funMutual</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-446"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>funProjection</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-447"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>funStatic</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-448"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>funCopy</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-449"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>funTerminates</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-conid'>True</span>
<a name="line-450"></a> <span class='hs-layout'>}</span>
<a name="line-451"></a> <span class='hs-comment'>-- Andreas 2012-01-30: since aux is lifted to toplevel</span>
<a name="line-452"></a> <span class='hs-comment'>-- it needs to be applied to the current telescope (issue 557)</span>
<a name="line-453"></a> <span class='hs-varid'>tel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getContextTelescope</span>
<a name="line-454"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Def</span> <span class='hs-varid'>aux</span> <span class='hs-varop'>$</span> <span class='hs-varid'>teleArgs</span> <span class='hs-varid'>tel</span>
<a name="line-455"></a> <span class='hs-comment'>-- WAS: return (Def aux [])</span>
<a name="line-456"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>WrongHidingInLambda</span> <span class='hs-varid'>t'</span>
<a name="line-457"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>ShouldBePi</span> <span class='hs-varid'>t'</span>
<a name="line-458"></a>
<a name="line-459"></a><span class='hs-comment'>{- OLD
<a name="line-460"></a> A.ExtendedLam i di qname cs -> do
<a name="line-461"></a> t <- reduceB =<< instantiateFull t
<a name="line-462"></a> let isMeta t = case ignoreSharing $ unEl t of { MetaV{} -> True; _ -> False }
<a name="line-463"></a> case t of
<a name="line-464"></a> Blocked{} -> postponeTypeCheckingProblem_ e $ ignoreBlocking t
<a name="line-465"></a> NotBlocked t' | isMeta t' -> postponeTypeCheckingProblem_ e $ ignoreBlocking t
<a name="line-466"></a> NotBlocked t -> do
<a name="line-467"></a>-}</span>
<a name="line-468"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ExtendedLam</span> <span class='hs-varid'>i</span> <span class='hs-varid'>di</span> <span class='hs-varid'>qname</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-469"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instantiateFull</span> <span class='hs-varid'>t</span>
<a name="line-470"></a> <span class='hs-varid'>ifBlockedType</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-varid'>m</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>postponeTypeCheckingProblem_</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-471"></a> <span class='hs-varid'>j</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>currentOrFreshMutualBlock</span>
<a name="line-472"></a> <span class='hs-varid'>rel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>envRelevance</span>
<a name="line-473"></a> <span class='hs-varid'>addConstant</span> <span class='hs-varid'>qname</span> <span class='hs-varop'>$</span>
<a name="line-474"></a> <span class='hs-conid'>Defn</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>qname</span> <span class='hs-varid'>t</span> <span class='hs-conid'>[]</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultDisplayForm</span> <span class='hs-varid'>qname</span><span class='hs-layout'>)</span> <span class='hs-varid'>j</span> <span class='hs-varid'>noCompiledRep</span> <span class='hs-conid'>Axiom</span>
<a name="line-475"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.exlam"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span>
<a name="line-476"></a> <span class='hs-varid'>text</span> <span class='hs-str'>"extended lambda's implementation \""</span> <span class='hs-varop'><></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>qname</span> <span class='hs-varop'><></span>
<a name="line-477"></a> <span class='hs-varid'>text</span> <span class='hs-str'>"\" has type: "</span> <span class='hs-varop'>$$</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t</span> <span class='hs-comment'>-- <+></span>
<a name="line-478"></a><span class='hs-comment'>-- text " where clauses: " <+> text (show cs)</span>
<a name="line-479"></a> <span class='hs-varid'>abstract</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>defAbstract</span> <span class='hs-varid'>di</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkFunDef'</span> <span class='hs-varid'>t</span> <span class='hs-varid'>rel</span> <span class='hs-conid'>NotDelayed</span> <span class='hs-varid'>di</span> <span class='hs-varid'>qname</span> <span class='hs-varid'>cs</span>
<a name="line-480"></a> <span class='hs-varid'>args</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getContextArgs</span>
<a name="line-481"></a> <span class='hs-varid'>top</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>currentModule</span>
<a name="line-482"></a> <span class='hs-varid'>freevars</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getSecFreeVars</span> <span class='hs-varid'>top</span>
<a name="line-483"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>argsNoParam</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>genericDrop</span> <span class='hs-varid'>freevars</span> <span class='hs-varid'>args</span> <span class='hs-comment'>-- don't count module parameters</span>
<a name="line-484"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>hid</span><span class='hs-layout'>,</span> <span class='hs-varid'>notHid</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>partition</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Hidden</span> <span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>argHiding</span><span class='hs-layout'>)</span> <span class='hs-varid'>argsNoParam</span>
<a name="line-485"></a> <span class='hs-varid'>addExtLambdaTele</span> <span class='hs-varid'>qname</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>hid</span><span class='hs-layout'>,</span> <span class='hs-varid'>length</span> <span class='hs-varid'>notHid</span><span class='hs-layout'>)</span>
<a name="line-486"></a> <span class='hs-varid'>reduce</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-conid'>Def</span> <span class='hs-varid'>qname</span> <span class='hs-conid'>[]</span> <span class='hs-varop'>`apply`</span> <span class='hs-varid'>args</span><span class='hs-layout'>)</span>
<a name="line-487"></a> <span class='hs-keyword'>where</span>
<a name="line-488"></a> <span class='hs-comment'>-- Concrete definitions cannot use information about abstract things.</span>
<a name="line-489"></a> <span class='hs-varid'>abstract</span> <span class='hs-conid'>ConcreteDef</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inConcreteMode</span>
<a name="line-490"></a> <span class='hs-varid'>abstract</span> <span class='hs-conid'>AbstractDef</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inAbstractMode</span>
<a name="line-491"></a>
<a name="line-492"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Lam</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>DomainFull</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TypedBindings</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>checkLambda</span> <span class='hs-varid'>b</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span>
<a name="line-493"></a>
<a name="line-494"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Lam</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>DomainFree</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>e0</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>checkExpr</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Lam</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>domainFree</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>e0</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-495"></a>
<a name="line-496"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Lit</span> <span class='hs-varid'>lit</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>checkLiteral</span> <span class='hs-varid'>lit</span> <span class='hs-varid'>t</span>
<a name="line-497"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Let</span> <span class='hs-varid'>i</span> <span class='hs-varid'>ds</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>checkLetBindings</span> <span class='hs-varid'>ds</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span>
<a name="line-498"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Pi</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-499"></a> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkTelescope_</span> <span class='hs-varid'>tel</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>tel</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-500"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instantiateFull</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>isType_</span> <span class='hs-varid'>e</span>
<a name="line-501"></a> <span class='hs-varid'>tel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instantiateFull</span> <span class='hs-varid'>tel</span>
<a name="line-502"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>telePi</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>t</span>
<a name="line-503"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getSort</span> <span class='hs-varid'>t'</span>
<a name="line-504"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-conid'>Inf</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.sort"</span> <span class='hs-num'>20</span> <span class='hs-varop'>$</span>
<a name="line-505"></a> <span class='hs-varid'>vcat</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-str'>"reduced to omega:"</span><span class='hs-layout'>)</span>
<a name="line-506"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"t ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t'</span>
<a name="line-507"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"cxt ="</span> <span class='hs-varop'><+></span> <span class='hs-layout'>(</span><span class='hs-varid'>prettyTCM</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>getContextTelescope</span><span class='hs-layout'>)</span>
<a name="line-508"></a> <span class='hs-keyglyph'>]</span>
<a name="line-509"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-varid'>unEl</span> <span class='hs-varid'>t'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>sort</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-510"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Fun</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-511"></a> <span class='hs-varid'>a'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isType_</span> <span class='hs-varid'>a</span>
<a name="line-512"></a> <span class='hs-varid'>b'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isType_</span> <span class='hs-varid'>b</span>
<a name="line-513"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>reduce</span> <span class='hs-varop'>$</span> <span class='hs-varid'>getSort</span> <span class='hs-varid'>a'</span> <span class='hs-varop'>`sLub`</span> <span class='hs-varid'>getSort</span> <span class='hs-varid'>b'</span>
<a name="line-514"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>NoAbs</span> <span class='hs-str'>"_"</span> <span class='hs-varid'>b'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>sort</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-515"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Set</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-516"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ifM</span> <span class='hs-varid'>typeInType</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-517"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Sort</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mkType</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>sort</span> <span class='hs-varop'>$</span> <span class='hs-varid'>mkType</span> <span class='hs-varop'>$</span> <span class='hs-varid'>n</span> <span class='hs-varop'>+</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-518"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Prop</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-519"></a> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-str'>"Prop is no longer supported"</span>
<a name="line-520"></a> <span class='hs-comment'>-- s <- ifM typeInType (return $ mkType 0) (return Prop)</span>
<a name="line-521"></a> <span class='hs-comment'>-- coerce (Sort Prop) (sort $ mkType 1) t</span>
<a name="line-522"></a>
<a name="line-523"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Rec</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-524"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>reduce</span> <span class='hs-varid'>t</span>
<a name="line-525"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>of</span>
<a name="line-526"></a> <span class='hs-conid'>Def</span> <span class='hs-varid'>r</span> <span class='hs-varid'>vs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-527"></a> <span class='hs-varid'>axs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getRecordFieldNames</span> <span class='hs-varid'>r</span>
<a name="line-528"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>unArg</span> <span class='hs-varid'>axs</span>
<a name="line-529"></a> <span class='hs-varid'>ftel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getRecordFieldTypes</span> <span class='hs-varid'>r</span>
<a name="line-530"></a> <span class='hs-varid'>con</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getRecordConstructor</span> <span class='hs-varid'>r</span>
<a name="line-531"></a> <span class='hs-varid'>scope</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getScope</span>
<a name="line-532"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>arg</span> <span class='hs-varid'>x</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span>
<a name="line-533"></a> <span class='hs-keyword'>case</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>axs</span><span class='hs-layout'>,</span> <span class='hs-varid'>unArg</span> <span class='hs-varid'>a</span> <span class='hs-varop'>==</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>]</span> <span class='hs-keyword'>of</span>
<a name="line-534"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>unnamed</span> <span class='hs-varid'>e</span> <span class='hs-varop'><$</span> <span class='hs-varid'>a</span>
<a name="line-535"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>defaultNamedArg</span> <span class='hs-varid'>e</span> <span class='hs-comment'>-- we only end up here if the field names are bad</span>
<a name="line-536"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>meta</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Underscore</span> <span class='hs-varop'>$</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>MetaInfo</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>scope</span> <span class='hs-conid'>Nothing</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-537"></a> <span class='hs-varid'>missingExplicits</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span> <span class='hs-layout'>(</span><span class='hs-varid'>unArg</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>unnamed</span> <span class='hs-varop'>.</span> <span class='hs-varid'>meta</span> <span class='hs-varop'><$></span> <span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-538"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>axs</span><span class='hs-layout'>,</span> <span class='hs-varid'>argHiding</span> <span class='hs-varid'>a</span> <span class='hs-varop'>==</span> <span class='hs-conid'>NotHidden</span>
<a name="line-539"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>notElem</span> <span class='hs-layout'>(</span><span class='hs-varid'>unArg</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>fst</span> <span class='hs-varid'>fs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>]</span>
<a name="line-540"></a> <span class='hs-comment'>-- In es omitted explicit fields are replaced by underscores</span>
<a name="line-541"></a> <span class='hs-comment'>-- (from missingExplicits). Omitted implicit or instance fields</span>
<a name="line-542"></a> <span class='hs-comment'>-- are still left out and inserted later by checkArguments_.</span>
<a name="line-543"></a> <span class='hs-varid'>es</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>concat</span> <span class='hs-varop'><$></span> <span class='hs-varid'>orderFields</span> <span class='hs-varid'>r</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>xs</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>arg</span> <span class='hs-varid'>x</span> <span class='hs-varid'>e</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span>
<a name="line-544"></a> <span class='hs-varid'>missingExplicits</span><span class='hs-layout'>)</span>
<a name="line-545"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>tel</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ftel</span> <span class='hs-varop'>`apply`</span> <span class='hs-varid'>vs</span>
<a name="line-546"></a> <span class='hs-varid'>args</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkArguments_</span> <span class='hs-conid'>ExpandLast</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-547"></a> <span class='hs-varid'>es</span> <span class='hs-comment'>-- (zipWith (\ax e -> fmap (const (unnamed e)) ax) axs es)</span>
<a name="line-548"></a> <span class='hs-varid'>tel</span>
<a name="line-549"></a> <span class='hs-comment'>-- Don't need to block here!</span>
<a name="line-550"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Con</span> <span class='hs-varid'>con</span> <span class='hs-varid'>args</span>
<a name="line-551"></a> <span class='hs-conid'>MetaV</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-552"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>fields</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>fst</span> <span class='hs-varid'>fs</span>
<a name="line-553"></a> <span class='hs-varid'>rs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>findPossibleRecords</span> <span class='hs-varid'>fields</span>
<a name="line-554"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>rs</span> <span class='hs-keyword'>of</span>
<a name="line-555"></a> <span class='hs-comment'>-- If there are no records with the right fields we might as well fail right away.</span>
<a name="line-556"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>fs</span> <span class='hs-keyword'>of</span>
<a name="line-557"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-str'>"There are no records in scope"</span>
<a name="line-558"></a> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-varop'>$</span> <span class='hs-str'>"There is no known record with the field "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>f</span>
<a name="line-559"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-varop'>$</span> <span class='hs-str'>"There is no known record with the fields "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>unwords</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>show</span> <span class='hs-varid'>fields</span><span class='hs-layout'>)</span>
<a name="line-560"></a> <span class='hs-comment'>-- If there's only one record with the appropriate fields, go with that.</span>
<a name="line-561"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>r</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-562"></a> <span class='hs-varid'>def</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getConstInfo</span> <span class='hs-varid'>r</span>
<a name="line-563"></a> <span class='hs-varid'>vs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newArgsMeta</span> <span class='hs-layout'>(</span><span class='hs-varid'>defType</span> <span class='hs-varid'>def</span><span class='hs-layout'>)</span>
<a name="line-564"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>target</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>piApply</span> <span class='hs-layout'>(</span><span class='hs-varid'>defType</span> <span class='hs-varid'>def</span><span class='hs-layout'>)</span> <span class='hs-varid'>vs</span>
<a name="line-565"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>target</span> <span class='hs-keyword'>of</span>
<a name="line-566"></a> <span class='hs-conid'>Level</span> <span class='hs-varid'>l</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-varid'>l</span>
<a name="line-567"></a> <span class='hs-conid'>Sort</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span>
<a name="line-568"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-569"></a> <span class='hs-varid'>inferred</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>El</span> <span class='hs-varid'>s</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Def</span> <span class='hs-varid'>r</span> <span class='hs-varid'>vs</span>
<a name="line-570"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>inferred</span>
<a name="line-571"></a> <span class='hs-varid'>coerce</span> <span class='hs-varid'>v</span> <span class='hs-varid'>inferred</span> <span class='hs-varid'>t</span>
<a name="line-572"></a> <span class='hs-comment'>-- Andreas 2012-04-21: OLD CODE, WRONG DIRECTION, I GUESS:</span>
<a name="line-573"></a> <span class='hs-comment'>-- blockTerm t $ v <$ leqType_ t inferred</span>
<a name="line-574"></a>
<a name="line-575"></a> <span class='hs-comment'>-- If there are more than one possible record we postpone</span>
<a name="line-576"></a> <span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-577"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.expr.rec"</span> <span class='hs-num'>10</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sep</span>
<a name="line-578"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"Postponing type checking of"</span>
<a name="line-579"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>prettyA</span> <span class='hs-varid'>e</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-str'>":"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t</span>
<a name="line-580"></a> <span class='hs-keyglyph'>]</span>
<a name="line-581"></a> <span class='hs-varid'>postponeTypeCheckingProblem_</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span>
<a name="line-582"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>ShouldBeRecordType</span> <span class='hs-varid'>t</span>
<a name="line-583"></a>
<a name="line-584"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>RecUpdate</span> <span class='hs-varid'>ei</span> <span class='hs-varid'>recexpr</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-585"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>of</span>
<a name="line-586"></a> <span class='hs-conid'>Def</span> <span class='hs-varid'>r</span> <span class='hs-varid'>vs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-587"></a> <span class='hs-varid'>rec</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>recexpr</span> <span class='hs-varid'>t</span>
<a name="line-588"></a> <span class='hs-varid'>name</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>freshNoName</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>recexpr</span><span class='hs-layout'>)</span>
<a name="line-589"></a> <span class='hs-varid'>addLetBinding</span> <span class='hs-conid'>Relevant</span> <span class='hs-varid'>name</span> <span class='hs-varid'>rec</span> <span class='hs-varid'>t</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-590"></a> <span class='hs-varid'>projs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>recFields</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getRecordDef</span> <span class='hs-varid'>r</span>
<a name="line-591"></a> <span class='hs-varid'>axs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getRecordFieldNames</span> <span class='hs-varid'>r</span>
<a name="line-592"></a> <span class='hs-varid'>scope</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getScope</span>
<a name="line-593"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>unArg</span> <span class='hs-varid'>axs</span>
<a name="line-594"></a> <span class='hs-varid'>es</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>orderFields</span> <span class='hs-varid'>r</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>fs</span>
<a name="line-595"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>es'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>zipWith</span> <span class='hs-layout'>(</span><span class='hs-varid'>replaceFields</span> <span class='hs-varid'>name</span> <span class='hs-varid'>ei</span><span class='hs-layout'>)</span> <span class='hs-varid'>projs</span> <span class='hs-varid'>es</span>
<a name="line-596"></a> <span class='hs-varid'>checkExpr</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Rec</span> <span class='hs-varid'>ei</span> <span class='hs-keyglyph'>[</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span><span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>zip</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>es'</span> <span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-597"></a> <span class='hs-conid'>MetaV</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-598"></a> <span class='hs-varid'>inferred</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferExpr</span> <span class='hs-varid'>recexpr</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>reduce</span> <span class='hs-varop'>.</span> <span class='hs-varid'>snd</span>
<a name="line-599"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>inferred</span> <span class='hs-keyword'>of</span>
<a name="line-600"></a> <span class='hs-conid'>MetaV</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>postponeTypeCheckingProblem_</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span>
<a name="line-601"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-602"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>inferred</span>
<a name="line-603"></a> <span class='hs-varid'>coerce</span> <span class='hs-varid'>v</span> <span class='hs-varid'>inferred</span> <span class='hs-varid'>t</span>
<a name="line-604"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>ShouldBeRecordType</span> <span class='hs-varid'>t</span>
<a name="line-605"></a> <span class='hs-keyword'>where</span>
<a name="line-606"></a> <span class='hs-varid'>replaceFields</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Name</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ExprInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Arg</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>QName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span>
<a name="line-607"></a> <span class='hs-varid'>replaceFields</span> <span class='hs-varid'>n</span> <span class='hs-varid'>ei</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-conid'>NotHidden</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>App</span> <span class='hs-varid'>ei</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Def</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>defaultNamedArg</span> <span class='hs-varop'>$</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Var</span> <span class='hs-varid'>n</span>
<a name="line-608"></a> <span class='hs-varid'>replaceFields</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-609"></a> <span class='hs-varid'>replaceFields</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>e</span>
<a name="line-610"></a>
<a name="line-611"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>DontCare</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-comment'>-- resurrect vars</span>
<a name="line-612"></a> <span class='hs-varid'>ifM</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>Irrelevant</span> <span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-varop'><$></span> <span class='hs-varid'>asks</span> <span class='hs-varid'>envRelevance</span><span class='hs-layout'>)</span>
<a name="line-613"></a> <span class='hs-layout'>(</span><span class='hs-conid'>DontCare</span> <span class='hs-varop'><$></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>applyRelevanceToContext</span> <span class='hs-conid'>Irrelevant</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-614"></a> <span class='hs-layout'>(</span><span class='hs-varid'>internalError</span> <span class='hs-str'>"DontCare may only appear in irrelevant contexts"</span><span class='hs-layout'>)</span>
<a name="line-615"></a><span class='hs-comment'>{- STALE?:
<a name="line-616"></a> Andreas, 2011-10-03 why do I get an internal error for Issue337?
<a name="line-617"></a> -- except that should be fixed now (issue 337)
<a name="line-618"></a> __IMPOSSIBLE__
<a name="line-619"></a>-}</span>
<a name="line-620"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ScopedExpr</span> <span class='hs-varid'>scope</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>setScope</span> <span class='hs-varid'>scope</span> <span class='hs-varop'>>></span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span>
<a name="line-621"></a>
<a name="line-622"></a> <span class='hs-varid'>e0</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>QuoteGoal</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>x</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-623"></a> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>etaContract</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>normalise</span> <span class='hs-varid'>t</span>
<a name="line-624"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>metas</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>allMetas</span> <span class='hs-varid'>t'</span>
<a name="line-625"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>metas</span> <span class='hs-keyword'>of</span>
<a name="line-626"></a> <span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>postponeTypeCheckingProblem</span> <span class='hs-varid'>e0</span> <span class='hs-varid'>t'</span> <span class='hs-varop'>$</span> <span class='hs-varid'>andM</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>isInstantiatedMeta</span> <span class='hs-varid'>metas</span>
<a name="line-627"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-628"></a> <span class='hs-varid'>quoted</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>quoteTerm</span> <span class='hs-layout'>(</span><span class='hs-varid'>unEl</span> <span class='hs-varid'>t'</span><span class='hs-layout'>)</span>
<a name="line-629"></a> <span class='hs-varid'>tmType</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>agdaTermType</span>
<a name="line-630"></a> <span class='hs-layout'>(</span><span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-varid'>ty</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>addLetBinding</span> <span class='hs-conid'>Relevant</span> <span class='hs-varid'>x</span> <span class='hs-varid'>quoted</span> <span class='hs-varid'>tmType</span> <span class='hs-layout'>(</span><span class='hs-varid'>inferExpr</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-631"></a> <span class='hs-varid'>blockTerm</span> <span class='hs-varid'>t'</span> <span class='hs-varop'>$</span> <span class='hs-varid'>coerce</span> <span class='hs-varid'>v</span> <span class='hs-varid'>ty</span> <span class='hs-varid'>t'</span>
<a name="line-632"></a>
<a name="line-633"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ETel</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-634"></a>
<a name="line-635"></a> <span class='hs-comment'>-- Application</span>
<a name="line-636"></a> <span class='hs-comment'>-- Subcase: ambiguous constructor</span>
<a name="line-637"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Application</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-layout'>(</span><span class='hs-conid'>AmbQ</span> <span class='hs-varid'>cs</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>appView</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-638"></a> <span class='hs-comment'>-- First we should figure out which constructor we want.</span>
<a name="line-639"></a> <span class='hs-varid'>reportSLn</span> <span class='hs-str'>"tc.check.term"</span> <span class='hs-num'>40</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Ambiguous constructor: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>cs</span>
<a name="line-640"></a>
<a name="line-641"></a> <span class='hs-comment'>-- Get the datatypes of the various constructors</span>
<a name="line-642"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>getData</span> <span class='hs-conid'>Constructor</span><span class='hs-layout'>{</span><span class='hs-varid'>conData</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span>
<a name="line-643"></a> <span class='hs-varid'>getData</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-644"></a> <span class='hs-varid'>reportSLn</span> <span class='hs-str'>"tc.check.term"</span> <span class='hs-num'>40</span> <span class='hs-varop'>$</span> <span class='hs-str'>" ranges before: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-645"></a> <span class='hs-comment'>-- We use the reduced constructor when disambiguating, but</span>
<a name="line-646"></a> <span class='hs-comment'>-- the original constructor for type checking. This is important</span>
<a name="line-647"></a> <span class='hs-comment'>-- since they may have different types (different parameters).</span>
<a name="line-648"></a> <span class='hs-comment'>-- See issue 279.</span>
<a name="line-649"></a> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>zip</span> <span class='hs-varid'>cs</span> <span class='hs-varop'>.</span> <span class='hs-varid'>zipWith</span> <span class='hs-varid'>setRange</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>getRange</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-varop'><$></span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>reduceCon</span> <span class='hs-varid'>cs</span>
<a name="line-650"></a> <span class='hs-varid'>reportSLn</span> <span class='hs-str'>"tc.check.term"</span> <span class='hs-num'>40</span> <span class='hs-varop'>$</span> <span class='hs-str'>" ranges after: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-651"></a> <span class='hs-varid'>reportSLn</span> <span class='hs-str'>"tc.check.term"</span> <span class='hs-num'>40</span> <span class='hs-varop'>$</span> <span class='hs-str'>" reduced: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>cs</span>
<a name="line-652"></a> <span class='hs-varid'>dcs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>c0</span><span class='hs-layout'>,</span> <span class='hs-varid'>c1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>getData</span> <span class='hs-varop'>/\</span> <span class='hs-varid'>const</span> <span class='hs-varid'>c0</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>theDef</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getConstInfo</span> <span class='hs-varid'>c1</span><span class='hs-layout'>)</span> <span class='hs-varid'>cs</span>
<a name="line-653"></a>
<a name="line-654"></a> <span class='hs-comment'>-- Type error</span>
<a name="line-655"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>badCon</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>DoesNotConstructAnElementOf</span>
<a name="line-656"></a> <span class='hs-layout'>(</span><span class='hs-varid'>fst</span> <span class='hs-varop'>$</span> <span class='hs-varid'>head</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-657"></a><span class='hs-comment'>{- OLD CODE
<a name="line-658"></a> -- Lets look at the target type at this point
<a name="line-659"></a> let getCon = do
<a name="line-660"></a> TelV _ t1 <- telView t
<a name="line-661"></a> t1 <- reduceB $ unEl t1
<a name="line-662"></a> reportSDoc "tc.check.term.con" 40 $ nest 2 $
<a name="line-663"></a> text "target type: " <+> prettyTCM t1
<a name="line-664"></a> case ignoreSharing <$> t1 of
<a name="line-665"></a> NotBlocked (Def d _) -> do
<a name="line-666"></a> let dataOrRec = case [ c | (d', c) <- dcs, d == d' ] of
<a name="line-667"></a> [c] -> do
<a name="line-668"></a> reportSLn "tc.check.term" 40 $ " decided on: " ++ show c
<a name="line-669"></a> return (Just c)
<a name="line-670"></a> [] -> badCon (Def d [])
<a name="line-671"></a> cs -> typeError $ GenericError $
<a name="line-672"></a> "Can't resolve overloaded constructors targeting the same datatype (" ++ show d ++
<a name="line-673"></a> "): " ++ unwords (map show cs)
<a name="line-674"></a> defn <- theDef <$> getConstInfo d
<a name="line-675"></a> case defn of
<a name="line-676"></a> Datatype{} -> dataOrRec
<a name="line-677"></a> Record{} -> dataOrRec
<a name="line-678"></a> _ -> badCon (ignoreBlocking t1)
<a name="line-679"></a> NotBlocked (MetaV _ _) -> return Nothing
<a name="line-680"></a> Blocked{} -> return Nothing
<a name="line-681"></a> _ -> badCon (ignoreBlocking t1)
<a name="line-682"></a>-}</span>
<a name="line-683"></a> <span class='hs-comment'>-- Lets look at the target type at this point</span>
<a name="line-684"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>getCon</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-685"></a> <span class='hs-conid'>TelV</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>t1</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>telView</span> <span class='hs-varid'>t</span>
<a name="line-686"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.check.term.con"</span> <span class='hs-num'>40</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span>
<a name="line-687"></a> <span class='hs-varid'>text</span> <span class='hs-str'>"target type: "</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t1</span>
<a name="line-688"></a> <span class='hs-varid'>ifBlocked</span> <span class='hs-layout'>(</span><span class='hs-varid'>unEl</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-varid'>m</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>-></span>
<a name="line-689"></a> <span class='hs-layout'>(</span><span class='hs-varid'>isDataOrRecord</span> <span class='hs-varid'>t'</span> <span class='hs-varop'>>>=</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>badCon</span> <span class='hs-varid'>t'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>-></span>
<a name="line-690"></a> <span class='hs-keyword'>case</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varid'>d'</span><span class='hs-layout'>,</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>dcs</span><span class='hs-layout'>,</span> <span class='hs-varid'>d</span> <span class='hs-varop'>==</span> <span class='hs-varid'>d'</span> <span class='hs-keyglyph'>]</span> <span class='hs-keyword'>of</span>
<a name="line-691"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-692"></a> <span class='hs-varid'>reportSLn</span> <span class='hs-str'>"tc.check.term"</span> <span class='hs-num'>40</span> <span class='hs-varop'>$</span> <span class='hs-str'>" decided on: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>c</span>
<a name="line-693"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-694"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>badCon</span> <span class='hs-layout'>(</span><span class='hs-conid'>Def</span> <span class='hs-varid'>d</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-695"></a> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>GenericError</span> <span class='hs-varop'>$</span>
<a name="line-696"></a> <span class='hs-str'>"Can't resolve overloaded constructors targeting the same datatype ("</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>d</span> <span class='hs-varop'>++</span>
<a name="line-697"></a> <span class='hs-str'>"): "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>unwords</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>show</span> <span class='hs-varid'>cs</span><span class='hs-layout'>)</span>
<a name="line-698"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>unblock</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isJust</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getCon</span> <span class='hs-comment'>-- to unblock, call getCon later again</span>
<a name="line-699"></a> <span class='hs-varid'>mc</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getCon</span>
<a name="line-700"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mc</span> <span class='hs-keyword'>of</span>
<a name="line-701"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>checkConstructorApplication</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span> <span class='hs-varid'>c</span> <span class='hs-varid'>args</span>
<a name="line-702"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>postponeTypeCheckingProblem</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span> <span class='hs-varid'>unblock</span>
<a name="line-703"></a>
<a name="line-704"></a> <span class='hs-comment'>-- Subcase: non-ambiguous constructor</span>
<a name="line-705"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Application</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-layout'>(</span><span class='hs-conid'>AmbQ</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>appView</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span>
<a name="line-706"></a> <span class='hs-varid'>checkConstructorApplication</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span> <span class='hs-varid'>c</span> <span class='hs-varid'>args</span>
<a name="line-707"></a>
<a name="line-708"></a> <span class='hs-comment'>-- Subcase: pattern synonym</span>
<a name="line-709"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Application</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>PatternSyn</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>appView</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-710"></a> <span class='hs-layout'>(</span><span class='hs-varid'>ns</span><span class='hs-layout'>,</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lookupPatternSyn</span> <span class='hs-varid'>n</span>
<a name="line-711"></a> <span class='hs-comment'>-- Expand the pattern synonym by substituting for</span>
<a name="line-712"></a> <span class='hs-comment'>-- the arguments we have got and lambda-lifting</span>
<a name="line-713"></a> <span class='hs-comment'>-- over the ones we haven't.</span>
<a name="line-714"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>zs</span><span class='hs-layout'>,</span> <span class='hs-varid'>ns'</span><span class='hs-layout'>,</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>zipWithTails</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>n</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-layout'>,</span> <span class='hs-varid'>namedThing</span> <span class='hs-layout'>(</span><span class='hs-varid'>unArg</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>ns</span> <span class='hs-varid'>args</span>
<a name="line-715"></a> <span class='hs-varid'>p'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>patternToExpr</span> <span class='hs-varop'>$</span> <span class='hs-varid'>setRange</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>p</span>
<a name="line-716"></a> <span class='hs-varid'>e'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>lambdaLiftExpr</span> <span class='hs-varid'>ns'</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>substExpr</span> <span class='hs-varid'>zs</span> <span class='hs-varid'>p'</span><span class='hs-layout'>)</span> <span class='hs-varop'>`</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>app</span><span class='hs-varop'>`</span> <span class='hs-keyword'>as</span>
<a name="line-717"></a> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>e'</span> <span class='hs-varid'>t</span>
<a name="line-718"></a>
<a name="line-719"></a> <span class='hs-comment'>-- Subcase: defined symbol or variable.</span>
<a name="line-720"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Application</span> <span class='hs-varid'>hd</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>appView</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span>
<a name="line-721"></a> <span class='hs-varid'>checkHeadApplication</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span> <span class='hs-varid'>hd</span> <span class='hs-varid'>args</span>
<a name="line-722"></a>
<a name="line-723"></a><a name="domainFree"></a><span class='hs-definition'>domainFree</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span>
<a name="line-724"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>DomainFull</span> <span class='hs-varop'>$</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TypedBindings</span> <span class='hs-varid'>r</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Arg</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-varop'>$</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>TBind</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>$</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Underscore</span> <span class='hs-varid'>info</span>
<a name="line-725"></a> <span class='hs-keyword'>where</span>
<a name="line-726"></a> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getRange</span> <span class='hs-varid'>x</span>
<a name="line-727"></a> <span class='hs-varid'>info</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>MetaInfo</span>
<a name="line-728"></a> <span class='hs-layout'>{</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaRange</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>r</span>
<a name="line-729"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaScope</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>emptyScopeInfo</span>
<a name="line-730"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaNumber</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-731"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaNameSuggestion</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</span>
<a name="line-732"></a> <span class='hs-layout'>}</span>
<a name="line-733"></a>
<a name="line-734"></a><a name="checkMeta"></a><span class='hs-definition'>checkMeta</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>MetaInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span>
<a name="line-735"></a><span class='hs-definition'>checkMeta</span> <span class='hs-varid'>newMeta</span> <span class='hs-varid'>t</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-736"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaNumber</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>of</span>
<a name="line-737"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-738"></a> <span class='hs-varid'>setScope</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaScope</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-739"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newMeta</span> <span class='hs-varid'>t</span>
<a name="line-740"></a> <span class='hs-varid'>setValueMetaName</span> <span class='hs-varid'>v</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaNameSuggestion</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-741"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>v</span>
<a name="line-742"></a> <span class='hs-comment'>-- Rechecking an existing metavariable</span>
<a name="line-743"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-744"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>MetaV</span> <span class='hs-layout'>(</span><span class='hs-conid'>MetaId</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span>
<a name="line-745"></a> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>jMetaType</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mvJudgement</span> <span class='hs-varop'><$></span> <span class='hs-varid'>lookupMeta</span> <span class='hs-layout'>(</span><span class='hs-conid'>MetaId</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-746"></a> <span class='hs-varid'>coerce</span> <span class='hs-varid'>v</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>t</span>
<a name="line-747"></a>
<a name="line-748"></a><a name="inferMeta"></a><span class='hs-definition'>inferMeta</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>MetaInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Args</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Term</span><span class='hs-layout'>,</span> <span class='hs-conid'>Type</span><span class='hs-layout'>)</span>
<a name="line-749"></a><span class='hs-definition'>inferMeta</span> <span class='hs-varid'>newMeta</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span>
<a name="line-750"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaNumber</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>of</span>
<a name="line-751"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-752"></a> <span class='hs-varid'>setScope</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaScope</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-753"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>workOnTypes</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newTypeMeta_</span>
<a name="line-754"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newMeta</span> <span class='hs-varid'>t</span>
<a name="line-755"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>apply</span> <span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-756"></a> <span class='hs-comment'>-- Rechecking an existing metavariable</span>
<a name="line-757"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-758"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>MetaV</span> <span class='hs-layout'>(</span><span class='hs-conid'>MetaId</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-759"></a> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>jMetaType</span> <span class='hs-varop'>.</span> <span class='hs-varid'>mvJudgement</span> <span class='hs-varop'><$></span> <span class='hs-varid'>lookupMeta</span> <span class='hs-layout'>(</span><span class='hs-conid'>MetaId</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-760"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-varid'>t'</span><span class='hs-layout'>)</span>
<a name="line-761"></a>
<a name="line-762"></a><a name="inferHead"></a><span class='hs-comment'>-- | Infer the type of a head thing (variable, function symbol, or constructor)</span>
<a name="line-763"></a><span class='hs-definition'>inferHead</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Args</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Term</span><span class='hs-layout'>,</span> <span class='hs-conid'>Type</span><span class='hs-layout'>)</span>
<a name="line-764"></a><span class='hs-definition'>inferHead</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Var</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-comment'>-- traceCall (InferVar x) $ do</span>
<a name="line-765"></a> <span class='hs-layout'>(</span><span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getVarInfo</span> <span class='hs-varid'>x</span>
<a name="line-766"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>unusableRelevance</span> <span class='hs-varop'>$</span> <span class='hs-varid'>domRelevance</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-767"></a> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>VariableIsIrrelevant</span> <span class='hs-varid'>x</span>
<a name="line-768"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>apply</span> <span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>unDom</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-769"></a><span class='hs-definition'>inferHead</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Def</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-770"></a> <span class='hs-varid'>proj</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isProjection</span> <span class='hs-varid'>x</span>
<a name="line-771"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>proj</span> <span class='hs-keyword'>of</span>
<a name="line-772"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-773"></a> <span class='hs-layout'>(</span><span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferDef</span> <span class='hs-conid'>Def</span> <span class='hs-varid'>x</span>
<a name="line-774"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>apply</span> <span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-775"></a> <span class='hs-conid'>Just</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-776"></a> <span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>r</span><span class='hs-layout'>,</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>funProjection</span> <span class='hs-varop'>.</span> <span class='hs-varid'>theDef</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getConstInfo</span> <span class='hs-varid'>x</span>
<a name="line-777"></a> <span class='hs-varid'>cxt</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>size</span> <span class='hs-varop'><$></span> <span class='hs-varid'>freeVarsToApply</span> <span class='hs-varid'>x</span>
<a name="line-778"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getDefFreeVars</span> <span class='hs-varid'>x</span>
<a name="line-779"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.proj"</span> <span class='hs-num'>10</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sep</span>
<a name="line-780"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"building projection"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>x</span>
<a name="line-781"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>parens</span> <span class='hs-layout'>(</span><span class='hs-varid'>text</span> <span class='hs-str'>"ctx ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>cxt</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-782"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>parens</span> <span class='hs-layout'>(</span><span class='hs-varid'>text</span> <span class='hs-str'>"n ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-783"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>parens</span> <span class='hs-layout'>(</span><span class='hs-varid'>text</span> <span class='hs-str'>"m ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>]</span>
<a name="line-784"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>hs</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-785"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>genericReplicate</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-conid'>NotHidden</span> <span class='hs-comment'>-- TODO: hiding</span>
<a name="line-786"></a> <span class='hs-varid'>names</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>s</span> <span class='hs-varop'>++</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'><-</span> <span class='hs-str'>""</span> <span class='hs-conop'>:</span> <span class='hs-varid'>names</span><span class='hs-layout'>,</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'><-</span> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'a'</span><span class='hs-keyglyph'>..</span><span class='hs-chr'>'z'</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>]</span>
<a name="line-787"></a> <span class='hs-varid'>eta</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>h</span><span class='hs-layout'>,</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Lam</span> <span class='hs-varid'>h</span> <span class='hs-varop'>.</span> <span class='hs-conid'>NoAbs</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Def</span> <span class='hs-varid'>x</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>zip</span> <span class='hs-varid'>hs</span> <span class='hs-varid'>names</span><span class='hs-layout'>)</span>
<a name="line-788"></a> <span class='hs-layout'>(</span><span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferDef</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>f</span> <span class='hs-varid'>vs</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>eta</span> <span class='hs-varop'>`apply`</span> <span class='hs-varid'>vs</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-789"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>apply</span> <span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-790"></a><span class='hs-definition'>inferHead</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-layout'>(</span><span class='hs-conid'>AmbQ</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-791"></a>
<a name="line-792"></a> <span class='hs-comment'>-- Constructors are polymorphic internally so when building the constructor</span>
<a name="line-793"></a> <span class='hs-comment'>-- term we should throw away arguments corresponding to parameters.</span>
<a name="line-794"></a>
<a name="line-795"></a> <span class='hs-comment'>-- First, inferDef will try to apply the constructor to the free parameters</span>
<a name="line-796"></a> <span class='hs-comment'>-- of the current context. We ignore that.</span>
<a name="line-797"></a> <span class='hs-layout'>(</span><span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferDef</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>c</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Con</span> <span class='hs-varid'>c</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-798"></a>
<a name="line-799"></a> <span class='hs-comment'>-- Next get the number of parameters in the current context.</span>
<a name="line-800"></a> <span class='hs-conid'>Constructor</span><span class='hs-layout'>{</span><span class='hs-varid'>conPars</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>theDef</span> <span class='hs-varop'><$></span> <span class='hs-layout'>(</span><span class='hs-varid'>instantiateDef</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>getConstInfo</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-801"></a>
<a name="line-802"></a> <span class='hs-varid'>verboseS</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>7</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-803"></a> <span class='hs-varid'>reportSLn</span> <span class='hs-str'>""</span> <span class='hs-num'>0</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unwords</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>show</span> <span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-str'>"has"</span><span class='hs-layout'>,</span> <span class='hs-varid'>show</span> <span class='hs-varid'>n</span><span class='hs-layout'>,</span> <span class='hs-str'>"parameters."</span><span class='hs-keyglyph'>]</span>
<a name="line-804"></a>
<a name="line-805"></a> <span class='hs-comment'>-- So when applying the constructor throw away the parameters.</span>
<a name="line-806"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>apply</span> <span class='hs-varid'>u</span> <span class='hs-varop'>.</span> <span class='hs-varid'>genericDrop</span> <span class='hs-varid'>n</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-807"></a><span class='hs-definition'>inferHead</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span> <span class='hs-comment'>-- inferHead will only be called on unambiguous constructors</span>
<a name="line-808"></a><span class='hs-definition'>inferHead</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>QuestionMark</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inferMeta</span> <span class='hs-varid'>newQuestionMark</span> <span class='hs-varid'>i</span>
<a name="line-809"></a><span class='hs-definition'>inferHead</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Underscore</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inferMeta</span> <span class='hs-layout'>(</span><span class='hs-varid'>newValueMeta</span> <span class='hs-conid'>RunMetaOccursCheck</span><span class='hs-layout'>)</span> <span class='hs-varid'>i</span>
<a name="line-810"></a><span class='hs-definition'>inferHead</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-layout'>(</span><span class='hs-varid'>term</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferExpr</span> <span class='hs-varid'>e</span>
<a name="line-811"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>apply</span> <span class='hs-varid'>term</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-812"></a>
<a name="line-813"></a><a name="inferDef"></a><span class='hs-definition'>inferDef</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>QName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Args</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Term</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Term</span><span class='hs-layout'>,</span> <span class='hs-conid'>Type</span><span class='hs-layout'>)</span>
<a name="line-814"></a><span class='hs-definition'>inferDef</span> <span class='hs-varid'>mkTerm</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span>
<a name="line-815"></a> <span class='hs-varid'>traceCall</span> <span class='hs-layout'>(</span><span class='hs-conid'>InferDef</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-816"></a> <span class='hs-varid'>d</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>instantiateDef</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>getConstInfo</span> <span class='hs-varid'>x</span>
<a name="line-817"></a> <span class='hs-comment'>-- irrelevant defs are only allowed in irrelevant position</span>
<a name="line-818"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>drel</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>defRelevance</span> <span class='hs-varid'>d</span>
<a name="line-819"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>drel</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>Relevant</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-820"></a> <span class='hs-varid'>rel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>envRelevance</span>
<a name="line-821"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.irr"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-822"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"declaration relevance ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>drel</span><span class='hs-layout'>)</span>
<a name="line-823"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"context relevance ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>rel</span><span class='hs-layout'>)</span>
<a name="line-824"></a> <span class='hs-keyglyph'>]</span>
<a name="line-825"></a> <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-varid'>drel</span> <span class='hs-varop'>`moreRelevant`</span> <span class='hs-varid'>rel</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>DefinitionIsIrrelevant</span> <span class='hs-varid'>x</span>
<a name="line-826"></a> <span class='hs-varid'>vs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>freeVarsToApply</span> <span class='hs-varid'>x</span>
<a name="line-827"></a> <span class='hs-varid'>verboseS</span> <span class='hs-str'>"tc.term.def"</span> <span class='hs-num'>10</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-828"></a> <span class='hs-varid'>ds</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>vs</span>
<a name="line-829"></a> <span class='hs-varid'>dx</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>x</span>
<a name="line-830"></a> <span class='hs-varid'>dt</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varop'>$</span> <span class='hs-varid'>defType</span> <span class='hs-varid'>d</span>
<a name="line-831"></a> <span class='hs-varid'>reportSLn</span> <span class='hs-str'>""</span> <span class='hs-num'>0</span> <span class='hs-varop'>$</span> <span class='hs-str'>"inferred def "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>unwords</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>dx</span> <span class='hs-conop'>:</span> <span class='hs-varid'>map</span> <span class='hs-varid'>show</span> <span class='hs-varid'>ds</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>" : "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>dt</span>
<a name="line-832"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkTerm</span> <span class='hs-varid'>x</span> <span class='hs-varid'>vs</span><span class='hs-layout'>,</span> <span class='hs-varid'>defType</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-833"></a>
<a name="line-834"></a><a name="checkConstructorApplication"></a><span class='hs-comment'>-- | Check the type of a constructor application. This is easier than</span>
<a name="line-835"></a><span class='hs-comment'>-- a general application since the implicit arguments can be inserted</span>
<a name="line-836"></a><span class='hs-comment'>-- without looking at the arguments to the constructor.</span>
<a name="line-837"></a><span class='hs-definition'>checkConstructorApplication</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>QName</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>NamedArg</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span>
<a name="line-838"></a><span class='hs-definition'>checkConstructorApplication</span> <span class='hs-varid'>org</span> <span class='hs-varid'>t</span> <span class='hs-varid'>c</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-839"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-840"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"entering checkConstructorApplication"</span>
<a name="line-841"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-842"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"org ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>org</span>
<a name="line-843"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"t ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t</span>
<a name="line-844"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"c ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>c</span>
<a name="line-845"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"args ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>args</span>
<a name="line-846"></a> <span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>]</span>
<a name="line-847"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>args'</span><span class='hs-layout'>,</span> <span class='hs-varid'>paramsGiven</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkForParams</span> <span class='hs-varid'>args</span>
<a name="line-848"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>paramsGiven</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>fallback</span> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-849"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"checkConstructorApplication: no parameters explicitly supplied, continuing..."</span>
<a name="line-850"></a> <span class='hs-varid'>cdef</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getConstInfo</span> <span class='hs-varid'>c</span>
<a name="line-851"></a> <span class='hs-keyword'>let</span> <span class='hs-conid'>Constructor</span><span class='hs-layout'>{</span><span class='hs-varid'>conData</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>theDef</span> <span class='hs-varid'>cdef</span>
<a name="line-852"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"d ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>d</span>
<a name="line-853"></a> <span class='hs-comment'>-- Issue 661: t maybe an evaluated form of d .., so we evaluate d</span>
<a name="line-854"></a> <span class='hs-comment'>-- as well and then check wether we deal with the same datatype</span>
<a name="line-855"></a> <span class='hs-varid'>t0</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>reduce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Def</span> <span class='hs-varid'>d</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-856"></a> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>ignoreSharing</span> <span class='hs-varid'>t0</span><span class='hs-layout'>,</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span> <span class='hs-comment'>-- Only fully applied constructors get special treatment</span>
<a name="line-857"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Def</span> <span class='hs-varid'>d0</span> <span class='hs-keyword'>_</span><span class='hs-layout'>,</span> <span class='hs-conid'>Def</span> <span class='hs-varid'>d'</span> <span class='hs-varid'>vs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-858"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"d0 ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>d0</span>
<a name="line-859"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"d' ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>d'</span>
<a name="line-860"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"vs ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>vs</span>
<a name="line-861"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>d'</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>d0</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>fallback</span> <span class='hs-keyword'>else</span> <span class='hs-keyword'>do</span>
<a name="line-862"></a> <span class='hs-comment'>-- Issue 661: d' may take more parameters than d, in particular</span>
<a name="line-863"></a> <span class='hs-comment'>-- these additional parameters could be a module parameter telescope.</span>
<a name="line-864"></a> <span class='hs-comment'>-- Since we get the constructor type ctype from d but the parameters</span>
<a name="line-865"></a> <span class='hs-comment'>-- from t = Def d' vs, we drop the additional parameters.</span>
<a name="line-866"></a> <span class='hs-varid'>npars</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getNumberOfParameters</span> <span class='hs-varid'>d</span>
<a name="line-867"></a> <span class='hs-varid'>npars'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getNumberOfParameters</span> <span class='hs-varid'>d'</span>
<a name="line-868"></a> <span class='hs-varid'>flip</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-varid'>fallback</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>sequenceA</span> <span class='hs-varop'>$</span> <span class='hs-conid'>List2</span> <span class='hs-layout'>(</span><span class='hs-varid'>npars</span><span class='hs-layout'>,</span> <span class='hs-varid'>npars'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>List2</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-layout'>,</span><span class='hs-varid'>n'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-869"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-varop'>$</span> <span class='hs-str'>"n = "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>n</span>
<a name="line-870"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-varop'>$</span> <span class='hs-str'>"n' = "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>n'</span>
<a name="line-871"></a> <span class='hs-comment'>-- when (n > n') __IMPOSSIBLE__ -- NOT IN SCOPE `__IMPOSSIBLE__' WHY???</span>
<a name="line-872"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varop'>></span> <span class='hs-varid'>n'</span><span class='hs-layout'>)</span> <span class='hs-varid'>bla</span>
<a name="line-873"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>genericTake</span> <span class='hs-varid'>n</span> <span class='hs-varop'>$</span> <span class='hs-varid'>genericDrop</span> <span class='hs-layout'>(</span><span class='hs-varid'>n'</span> <span class='hs-comment'>-</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>vs</span>
<a name="line-874"></a> <span class='hs-varid'>ctype</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>defType</span> <span class='hs-varid'>cdef</span>
<a name="line-875"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>20</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-876"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"special checking of constructor application of"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>c</span>
<a name="line-877"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"ps ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>ps</span>
<a name="line-878"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"ctype ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>ctype</span> <span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>]</span>
<a name="line-879"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ctype'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ctype</span> <span class='hs-varop'>`piApply`</span> <span class='hs-varid'>ps</span>
<a name="line-880"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>20</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"ctype' ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>ctype'</span>
<a name="line-881"></a> <span class='hs-comment'>-- check the non-parameter arguments</span>
<a name="line-882"></a> <span class='hs-varid'>checkArguments'</span> <span class='hs-conid'>ExpandLast</span> <span class='hs-conid'>ExpandInstanceArguments</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>args'</span> <span class='hs-varid'>ctype'</span> <span class='hs-varid'>t</span> <span class='hs-varid'>org</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>us</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-883"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>20</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-884"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"us ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>us</span>
<a name="line-885"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"t' ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t'</span> <span class='hs-keyglyph'>]</span>
<a name="line-886"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Con</span> <span class='hs-varid'>c</span> <span class='hs-varid'>us</span><span class='hs-layout'>)</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>t</span>
<a name="line-887"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-888"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>50</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>text</span> <span class='hs-str'>"we are not at a datatype, falling back"</span>
<a name="line-889"></a> <span class='hs-varid'>fallback</span>
<a name="line-890"></a> <span class='hs-keyword'>where</span>
<a name="line-891"></a> <span class='hs-varid'>fallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkHeadApplication</span> <span class='hs-varid'>org</span> <span class='hs-varid'>t</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-layout'>(</span><span class='hs-conid'>AmbQ</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span>
<a name="line-892"></a> <span class='hs-varid'>bla</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-893"></a>
<a name="line-894"></a> <span class='hs-comment'>-- Check if there are explicitly given hidden arguments,</span>
<a name="line-895"></a> <span class='hs-comment'>-- in which case we fall back to default type checking.</span>
<a name="line-896"></a> <span class='hs-comment'>-- We could work harder, but let's not for now.</span>
<a name="line-897"></a> <span class='hs-comment'>--</span>
<a name="line-898"></a> <span class='hs-comment'>-- Andreas, 2012-04-18: if all inital args are underscores, ignore them</span>
<a name="line-899"></a> <span class='hs-varid'>checkForParams</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'>=</span>
<a name="line-900"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>hargs</span><span class='hs-layout'>,</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>span</span> <span class='hs-varid'>isHiddenArg</span> <span class='hs-varid'>args</span>
<a name="line-901"></a> <span class='hs-varid'>removeScope</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>ScopedExpr</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>removeScope</span> <span class='hs-varid'>e</span>
<a name="line-902"></a> <span class='hs-varid'>removeScope</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>e</span>
<a name="line-903"></a> <span class='hs-varid'>notUnderscore</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Underscore</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-904"></a> <span class='hs-varid'>notUnderscore</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-905"></a> <span class='hs-keyword'>in</span> <span class='hs-layout'>(</span><span class='hs-varid'>rest</span><span class='hs-layout'>,</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>any</span> <span class='hs-varid'>notUnderscore</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>removeScope</span> <span class='hs-varop'>.</span> <span class='hs-varid'>namedArg</span><span class='hs-layout'>)</span> <span class='hs-varid'>hargs</span>
<a name="line-906"></a>
<a name="line-907"></a><span class='hs-comment'>{- UNUSED CODE, BUT DON'T REMOVE (2012-04-18)
<a name="line-908"></a>
<a name="line-909"></a> -- Split the arguments to a constructor into those corresponding
<a name="line-910"></a> -- to parameters and those that don't. Dummy underscores are inserted
<a name="line-911"></a> -- for parameters that are not given explicitly.
<a name="line-912"></a> splitArgs [] args = ([], args)
<a name="line-913"></a> splitArgs ps [] =
<a name="line-914"></a> (map (const dummyUnderscore) ps, args)
<a name="line-915"></a> splitArgs ps args@(Arg NotHidden _ _ : _) =
<a name="line-916"></a> (map (const dummyUnderscore) ps, args)
<a name="line-917"></a> splitArgs (p:ps) (arg : args)
<a name="line-918"></a> | elem mname [Nothing, Just p] =
<a name="line-919"></a> (arg :) *** id $ splitArgs ps args
<a name="line-920"></a> | otherwise =
<a name="line-921"></a> (dummyUnderscore :) *** id $ splitArgs ps (arg:args)
<a name="line-922"></a> where
<a name="line-923"></a> mname = nameOf (unArg arg)
<a name="line-924"></a>
<a name="line-925"></a> dummyUnderscore = Arg Hidden Relevant (unnamed $ A.Underscore $ A.MetaInfo noRange emptyScopeInfo Nothing)
<a name="line-926"></a>-}</span>
<a name="line-927"></a>
<a name="line-928"></a><a name="checkHeadApplication"></a><span class='hs-comment'>-- | @checkHeadApplication e t hd args@ checks that @e@ has type @t@,</span>
<a name="line-929"></a><span class='hs-comment'>-- assuming that @e@ has the form @hd args@. The corresponding</span>
<a name="line-930"></a><span class='hs-comment'>-- type-checked term is returned.</span>
<a name="line-931"></a><span class='hs-comment'>--</span>
<a name="line-932"></a><span class='hs-comment'>-- If the head term @hd@ is a coinductive constructor, then a</span>
<a name="line-933"></a><span class='hs-comment'>-- top-level definition @fresh tel = hd args@ (where the clause is</span>
<a name="line-934"></a><span class='hs-comment'>-- delayed) is added, where @tel@ corresponds to the current</span>
<a name="line-935"></a><span class='hs-comment'>-- telescope. The returned term is @fresh tel@.</span>
<a name="line-936"></a><span class='hs-comment'>--</span>
<a name="line-937"></a><span class='hs-comment'>-- Precondition: The head @hd@ has to be unambiguous, and there should</span>
<a name="line-938"></a><span class='hs-comment'>-- not be any need to insert hidden lambdas.</span>
<a name="line-939"></a><span class='hs-definition'>checkHeadApplication</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>NamedArg</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span>
<a name="line-940"></a><span class='hs-definition'>checkHeadApplication</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span> <span class='hs-varid'>hd</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-941"></a> <span class='hs-varid'>kit</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>coinductionKit</span>
<a name="line-942"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>hd</span> <span class='hs-keyword'>of</span>
<a name="line-943"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-layout'>(</span><span class='hs-conid'>AmbQ</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-varid'>nameOfSharp</span> <span class='hs-varop'><$></span> <span class='hs-varid'>kit</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-944"></a> <span class='hs-comment'>-- Type checking # generated #-wrapper. The # that the user can write will be a Def,</span>
<a name="line-945"></a> <span class='hs-comment'>-- but the sharp we generate in the body of the wrapper is a Con.</span>
<a name="line-946"></a> <span class='hs-varid'>defaultResult</span>
<a name="line-947"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-layout'>(</span><span class='hs-conid'>AmbQ</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-948"></a> <span class='hs-layout'>(</span><span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-varid'>t0</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferHead</span> <span class='hs-varid'>hd</span>
<a name="line-949"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>5</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-950"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"checkHeadApplication inferred"</span> <span class='hs-varop'><+></span>
<a name="line-951"></a> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>c</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-str'>":"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t0</span>
<a name="line-952"></a> <span class='hs-keyglyph'>]</span>
<a name="line-953"></a> <span class='hs-varid'>checkArguments'</span> <span class='hs-conid'>ExpandLast</span> <span class='hs-conid'>ExpandInstanceArguments</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>hd</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>t</span> <span class='hs-varid'>e</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>vs</span> <span class='hs-varid'>t1</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-954"></a> <span class='hs-conid'>TelV</span> <span class='hs-varid'>eTel</span> <span class='hs-varid'>eType</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>telView</span> <span class='hs-varid'>t</span>
<a name="line-955"></a> <span class='hs-comment'>-- If the expected type @eType@ is a metavariable we have to make</span>
<a name="line-956"></a> <span class='hs-comment'>-- sure it's instantiated to the proper pi type</span>
<a name="line-957"></a> <span class='hs-conid'>TelV</span> <span class='hs-varid'>fTel</span> <span class='hs-varid'>fType</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>telViewUpTo</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>eTel</span><span class='hs-layout'>)</span> <span class='hs-varid'>t1</span>
<a name="line-958"></a> <span class='hs-comment'>-- We know that the target type of the constructor (fType)</span>
<a name="line-959"></a> <span class='hs-comment'>-- does not depend on fTel so we can compare fType and eType</span>
<a name="line-960"></a> <span class='hs-comment'>-- first.</span>
<a name="line-961"></a>
<a name="line-962"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>eTel</span> <span class='hs-varop'>></span> <span class='hs-varid'>size</span> <span class='hs-varid'>fTel</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-963"></a> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>UnequalTypes</span> <span class='hs-conid'>CmpLeq</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>t</span> <span class='hs-comment'>-- switch because of contravariance</span>
<a name="line-964"></a> <span class='hs-comment'>-- Andreas, 2011-05-10 report error about types rather telescopes</span>
<a name="line-965"></a> <span class='hs-comment'>-- compareTel CmpLeq eTel fTel >> return () -- This will fail!</span>
<a name="line-966"></a>
<a name="line-967"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.con"</span> <span class='hs-num'>10</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-968"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"checking"</span> <span class='hs-varop'><+></span>
<a name="line-969"></a> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>fType</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-str'>"?<="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>eType</span>
<a name="line-970"></a> <span class='hs-keyglyph'>]</span>
<a name="line-971"></a> <span class='hs-varid'>blockTerm</span> <span class='hs-varid'>t</span> <span class='hs-varop'>$</span> <span class='hs-varid'>f</span> <span class='hs-varid'>vs</span> <span class='hs-varop'><$</span> <span class='hs-varid'>workOnTypes</span> <span class='hs-layout'>(</span><span class='hs-keyword'>do</span>
<a name="line-972"></a> <span class='hs-varid'>addCtxTel</span> <span class='hs-varid'>eTel</span> <span class='hs-varop'>$</span> <span class='hs-varid'>leqType</span> <span class='hs-varid'>fType</span> <span class='hs-varid'>eType</span>
<a name="line-973"></a> <span class='hs-varid'>compareTel</span> <span class='hs-varid'>t</span> <span class='hs-varid'>t1</span> <span class='hs-conid'>CmpLeq</span> <span class='hs-varid'>eTel</span> <span class='hs-varid'>fTel</span><span class='hs-layout'>)</span>
<a name="line-974"></a>
<a name="line-975"></a> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Def</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-varid'>nameOfSharp</span> <span class='hs-varop'><$></span> <span class='hs-varid'>kit</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-976"></a> <span class='hs-comment'>-- TODO: Handle coinductive constructors under lets.</span>
<a name="line-977"></a> <span class='hs-varid'>lets</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>envLetBindings</span> <span class='hs-varop'><$></span> <span class='hs-varid'>ask</span>
<a name="line-978"></a> <span class='hs-varid'>unless</span> <span class='hs-layout'>(</span><span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>null</span> <span class='hs-varid'>lets</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-979"></a> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>NotImplemented</span>
<a name="line-980"></a> <span class='hs-str'>"coinductive constructor in the scope of a let-bound variable"</span>
<a name="line-981"></a>
<a name="line-982"></a> <span class='hs-comment'>-- The name of the fresh function.</span>
<a name="line-983"></a> <span class='hs-varid'>i</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>fresh</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Int</span>
<a name="line-984"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-chr'>'_'</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varop'>$</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>qnameName</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-str'>"-"</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>i</span>
<a name="line-985"></a> <span class='hs-varid'>c'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>setRange</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varop'><$></span>
<a name="line-986"></a> <span class='hs-varid'>liftM2</span> <span class='hs-varid'>qualify</span> <span class='hs-layout'>(</span><span class='hs-varid'>killRange</span> <span class='hs-varop'><$></span> <span class='hs-varid'>currentModule</span><span class='hs-layout'>)</span>
<a name="line-987"></a> <span class='hs-layout'>(</span><span class='hs-varid'>freshName_</span> <span class='hs-varid'>name</span><span class='hs-layout'>)</span>
<a name="line-988"></a>
<a name="line-989"></a> <span class='hs-comment'>-- The application of the fresh function to the relevant</span>
<a name="line-990"></a> <span class='hs-comment'>-- arguments.</span>
<a name="line-991"></a> <span class='hs-varid'>e'</span> <span class='hs-keyglyph'><-</span> <span class='hs-conid'>Def</span> <span class='hs-varid'>c'</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getContextArgs</span>
<a name="line-992"></a>
<a name="line-993"></a> <span class='hs-comment'>-- Add the type signature of the fresh function to the</span>
<a name="line-994"></a> <span class='hs-comment'>-- signature.</span>
<a name="line-995"></a> <span class='hs-varid'>i</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>currentOrFreshMutualBlock</span>
<a name="line-996"></a> <span class='hs-varid'>tel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getContextTelescope</span>
<a name="line-997"></a> <span class='hs-comment'>-- If we are in irrelevant position, add definition irrelevantly.</span>
<a name="line-998"></a> <span class='hs-comment'>-- TODO: is this sufficient?</span>
<a name="line-999"></a> <span class='hs-varid'>rel</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>envRelevance</span>
<a name="line-1000"></a> <span class='hs-varid'>addConstant</span> <span class='hs-varid'>c'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Defn</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>c'</span> <span class='hs-varid'>t</span> <span class='hs-conid'>[]</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-varid'>defaultDisplayForm</span> <span class='hs-varid'>c'</span><span class='hs-layout'>)</span> <span class='hs-varid'>i</span> <span class='hs-varid'>noCompiledRep</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Axiom</span><span class='hs-layout'>)</span>
<a name="line-1001"></a>
<a name="line-1002"></a> <span class='hs-comment'>-- Define and type check the fresh function.</span>
<a name="line-1003"></a> <span class='hs-varid'>ctx</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getContext</span>
<a name="line-1004"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>info</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>mkDefInfo</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>nameConcrete</span> <span class='hs-varop'>$</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>qnameName</span> <span class='hs-varid'>c'</span><span class='hs-layout'>)</span> <span class='hs-varid'>defaultFixity'</span>
<a name="line-1005"></a> <span class='hs-conid'>PublicAccess</span> <span class='hs-conid'>ConcreteDef</span> <span class='hs-varid'>noRange</span>
<a name="line-1006"></a> <span class='hs-varid'>pats</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Arg</span> <span class='hs-varid'>h</span> <span class='hs-varid'>r</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Named</span> <span class='hs-conid'>Nothing</span> <span class='hs-varop'>$</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>VarP</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-1007"></a> <span class='hs-varid'>reverse</span> <span class='hs-varid'>ctx</span>
<a name="line-1008"></a> <span class='hs-varid'>clause</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Clause</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LHS</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LHSRange</span> <span class='hs-varid'>noRange</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LHSHead</span> <span class='hs-varid'>c'</span> <span class='hs-varid'>pats</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span>
<a name="line-1009"></a> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>RHS</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unAppView</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Application</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-layout'>(</span><span class='hs-conid'>AmbQ</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-1010"></a> <span class='hs-conid'>[]</span>
<a name="line-1011"></a>
<a name="line-1012"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.expr.coind"</span> <span class='hs-num'>15</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span> <span class='hs-varop'>$</span>
<a name="line-1013"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"The coinductive constructor application"</span>
<a name="line-1014"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>e</span>
<a name="line-1015"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"was translated into the application"</span>
<a name="line-1016"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>e'</span>
<a name="line-1017"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"and the function"</span>
<a name="line-1018"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>rel</span> <span class='hs-varop'><></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>c'</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-str'>":"</span>
<a name="line-1019"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>4</span> <span class='hs-varop'>$</span> <span class='hs-varid'>prettyTCM</span> <span class='hs-layout'>(</span><span class='hs-varid'>telePi</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1020"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>prettyA</span> <span class='hs-varid'>clause</span> <span class='hs-varop'><></span> <span class='hs-varid'>text</span> <span class='hs-str'>"."</span>
<a name="line-1021"></a> <span class='hs-keyglyph'>]</span>
<a name="line-1022"></a>
<a name="line-1023"></a> <span class='hs-varid'>escapeContextToTopLevel</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkFunDef</span> <span class='hs-conid'>Delayed</span> <span class='hs-varid'>info</span> <span class='hs-varid'>c'</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>clause</span><span class='hs-keyglyph'>]</span>
<a name="line-1024"></a>
<a name="line-1025"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.expr.coind"</span> <span class='hs-num'>15</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-1026"></a> <span class='hs-varid'>def</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>theDef</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getConstInfo</span> <span class='hs-varid'>c'</span>
<a name="line-1027"></a> <span class='hs-varid'>text</span> <span class='hs-str'>"The definition is"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varop'>$</span> <span class='hs-varid'>funDelayed</span> <span class='hs-varid'>def</span><span class='hs-layout'>)</span> <span class='hs-varop'><></span>
<a name="line-1028"></a> <span class='hs-varid'>text</span> <span class='hs-str'>"."</span>
<a name="line-1029"></a>
<a name="line-1030"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>e'</span>
<a name="line-1031"></a> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Con</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-1032"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>defaultResult</span>
<a name="line-1033"></a> <span class='hs-keyword'>where</span>
<a name="line-1034"></a> <span class='hs-varid'>defaultResult</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-1035"></a> <span class='hs-layout'>(</span><span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-varid'>t0</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferHead</span> <span class='hs-varid'>hd</span>
<a name="line-1036"></a> <span class='hs-varid'>checkArguments'</span> <span class='hs-conid'>ExpandLast</span> <span class='hs-conid'>ExpandInstanceArguments</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>hd</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>t</span> <span class='hs-varid'>e</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>vs</span> <span class='hs-varid'>t1</span> <span class='hs-keyglyph'>-></span>
<a name="line-1037"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>vs</span><span class='hs-layout'>)</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>t</span>
<a name="line-1038"></a>
<a name="line-1039"></a><a name="instance%20Error%20Type"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Error</span> <span class='hs-conid'>Type</span> <span class='hs-keyword'>where</span>
<a name="line-1040"></a> <span class='hs-varid'>strMsg</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-1041"></a> <span class='hs-varid'>noMsg</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-1042"></a>
<a name="line-1043"></a><a name="traceCallE"></a><span class='hs-definition'>traceCallE</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Error</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Call</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrorT</span> <span class='hs-varid'>e</span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrorT</span> <span class='hs-varid'>e</span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>r</span>
<a name="line-1044"></a><span class='hs-definition'>traceCallE</span> <span class='hs-varid'>call</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-1045"></a> <span class='hs-varid'>z</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-varid'>traceCall</span> <span class='hs-varid'>call'</span> <span class='hs-varop'>$</span> <span class='hs-varid'>runErrorT</span> <span class='hs-varid'>m</span>
<a name="line-1046"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>z</span> <span class='hs-keyword'>of</span>
<a name="line-1047"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>e</span>
<a name="line-1048"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>throwError</span> <span class='hs-varid'>err</span>
<a name="line-1049"></a> <span class='hs-keyword'>where</span>
<a name="line-1050"></a> <span class='hs-varid'>call'</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>call</span> <span class='hs-conid'>Nothing</span>
<a name="line-1051"></a> <span class='hs-varid'>call'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>call</span> <span class='hs-conid'>Nothing</span>
<a name="line-1052"></a> <span class='hs-varid'>call'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>call</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-1053"></a>
<a name="line-1054"></a><a name="checkArguments"></a><span class='hs-comment'>-- | Check a list of arguments: @checkArgs args t0 t1@ checks that</span>
<a name="line-1055"></a><span class='hs-comment'>-- @t0 = Delta -> t0'@ and @args : Delta@. Inserts hidden arguments to</span>
<a name="line-1056"></a><span class='hs-comment'>-- make this happen. Returns the evaluated arguments @vs@, the remaining</span>
<a name="line-1057"></a><span class='hs-comment'>-- type @t0'@ (which should be a subtype of @t1@) and any constraints @cs@</span>
<a name="line-1058"></a><span class='hs-comment'>-- that have to be solved for everything to be well-formed.</span>
<a name="line-1059"></a><span class='hs-comment'>--</span>
<a name="line-1060"></a><span class='hs-comment'>-- TODO: doesn't do proper blocking of terms</span>
<a name="line-1061"></a><span class='hs-definition'>checkArguments</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ExpandHidden</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ExpandInstances</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>NamedArg</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span>
<a name="line-1062"></a> <span class='hs-conid'>ErrorT</span> <span class='hs-conid'>Type</span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Args</span><span class='hs-layout'>,</span> <span class='hs-conid'>Type</span><span class='hs-layout'>)</span>
<a name="line-1063"></a><span class='hs-definition'>checkArguments</span> <span class='hs-conid'>DontExpandLast</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>t1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-varid'>t0</span><span class='hs-layout'>)</span>
<a name="line-1064"></a><span class='hs-definition'>checkArguments</span> <span class='hs-varid'>exh</span> <span class='hs-varid'>expandIFS</span> <span class='hs-varid'>r</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>t1</span> <span class='hs-keyglyph'>=</span>
<a name="line-1065"></a> <span class='hs-varid'>traceCallE</span> <span class='hs-layout'>(</span><span class='hs-conid'>CheckArguments</span> <span class='hs-varid'>r</span> <span class='hs-conid'>[]</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-1066"></a> <span class='hs-varid'>t1'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>unEl</span> <span class='hs-varop'><$></span> <span class='hs-varid'>reduce</span> <span class='hs-varid'>t1</span>
<a name="line-1067"></a> <span class='hs-varid'>implicitArgs</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>expand</span> <span class='hs-varid'>t1'</span><span class='hs-layout'>)</span> <span class='hs-varid'>t0</span>
<a name="line-1068"></a> <span class='hs-keyword'>where</span>
<a name="line-1069"></a> <span class='hs-varid'>expand</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-varid'>h</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-conid'>Hidden</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>h</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>Hidden</span>
<a name="line-1070"></a> <span class='hs-varid'>expand</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Hidden</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-1071"></a> <span class='hs-varid'>expand</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-varid'>h</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-conid'>Instance</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>h</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>Instance</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>expandIFS</span> <span class='hs-varop'>==</span> <span class='hs-conid'>ExpandInstanceArguments</span>
<a name="line-1072"></a> <span class='hs-varid'>expand</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Instance</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>expandIFS</span> <span class='hs-varop'>==</span> <span class='hs-conid'>ExpandInstanceArguments</span>
<a name="line-1073"></a> <span class='hs-varid'>expand</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>NotHidden</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-1074"></a>
<a name="line-1075"></a><span class='hs-comment'>{- OLD CODE
<a name="line-1076"></a>checkArguments exh expandIFS r [] t0 t1 =
<a name="line-1077"></a> traceCallE (CheckArguments r [] t0 t1) $ do
<a name="line-1078"></a> t0' <- lift $ reduce t0
<a name="line-1079"></a> t1' <- lift $ reduce t1
<a name="line-1080"></a> case ignoreSharing $ unEl t0' of
<a name="line-1081"></a> Pi (Dom Hidden rel a) _ | notHPi Hidden $ unEl t1' -> do
<a name="line-1082"></a> v <- lift $ applyRelevanceToContext rel $ newValueMeta RunMetaOccursCheck a
<a name="line-1083"></a> let arg = Arg Hidden rel v
<a name="line-1084"></a> (vs, t0'') <- checkArguments exh expandIFS r [] (piApply t0' [arg]) t1'
<a name="line-1085"></a> return (arg : vs, t0'')
<a name="line-1086"></a> Pi (Dom Instance rel a) _ | expandIFS == ExpandInstanceArguments &&
<a name="line-1087"></a> (notHPi Instance $ unEl t1') -> do
<a name="line-1088"></a> lift $ reportSLn "tc.term.args.ifs" 15 $ "inserting implicit meta for type " ++ show a
<a name="line-1089"></a> v <- lift $ applyRelevanceToContext rel $ initializeIFSMeta a
<a name="line-1090"></a> let arg = Arg Instance rel v
<a name="line-1091"></a> (vs, t0'') <- checkArguments exh expandIFS r [] (piApply t0' [arg]) t1'
<a name="line-1092"></a> return (arg : vs, t0'')
<a name="line-1093"></a> _ -> return ([], t0')
<a name="line-1094"></a> where
<a name="line-1095"></a> notHPi h (Pi (Dom h' _ _) _) | h == h' = False
<a name="line-1096"></a> notHPi h (Shared p) = notHPi h $ derefPtr p
<a name="line-1097"></a> notHPi _ _ = True
<a name="line-1098"></a>-}</span>
<a name="line-1099"></a>
<a name="line-1100"></a><span class='hs-definition'>checkArguments</span> <span class='hs-varid'>exh</span> <span class='hs-varid'>expandIFS</span> <span class='hs-varid'>r</span> <span class='hs-varid'>args0</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-varid'>h</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>e</span> <span class='hs-conop'>:</span> <span class='hs-varid'>args</span><span class='hs-layout'>)</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>t1</span> <span class='hs-keyglyph'>=</span>
<a name="line-1101"></a> <span class='hs-varid'>traceCallE</span> <span class='hs-layout'>(</span><span class='hs-conid'>CheckArguments</span> <span class='hs-varid'>r</span> <span class='hs-varid'>args0</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-1102"></a> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.args"</span> <span class='hs-num'>30</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sep</span>
<a name="line-1103"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"checkArguments"</span>
<a name="line-1104"></a><span class='hs-comment'>-- , text " args0 =" <+> prettyA args0</span>
<a name="line-1105"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-1106"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"e ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyA</span> <span class='hs-varid'>e</span>
<a name="line-1107"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"t0 ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t0</span>
<a name="line-1108"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"t1 ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t1</span>
<a name="line-1109"></a> <span class='hs-keyglyph'>]</span>
<a name="line-1110"></a> <span class='hs-keyglyph'>]</span>
<a name="line-1111"></a> <span class='hs-varid'>t0b</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reduceB</span> <span class='hs-varid'>t0</span>
<a name="line-1112"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>isMeta</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>t</span> <span class='hs-keyword'>of</span> <span class='hs-layout'>{</span> <span class='hs-conid'>MetaV</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span><span class='hs-layout'>;</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>False</span> <span class='hs-layout'>}</span>
<a name="line-1113"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>t0b</span> <span class='hs-keyword'>of</span>
<a name="line-1114"></a> <span class='hs-conid'>Blocked</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>throwError</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ignoreBlocking</span> <span class='hs-varid'>t0b</span>
<a name="line-1115"></a> <span class='hs-conid'>NotBlocked</span> <span class='hs-varid'>t0'</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isMeta</span> <span class='hs-varid'>t0'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>throwError</span> <span class='hs-varop'>$</span> <span class='hs-varid'>ignoreBlocking</span> <span class='hs-varid'>t0b</span>
<a name="line-1116"></a> <span class='hs-conid'>NotBlocked</span> <span class='hs-varid'>t0'</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-1117"></a> <span class='hs-comment'>-- (t0', cs) <- forcePi h (name e) t0</span>
<a name="line-1118"></a> <span class='hs-varid'>e'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>namedThing</span> <span class='hs-varid'>e</span>
<a name="line-1119"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>t0'</span> <span class='hs-keyword'>of</span>
<a name="line-1120"></a> <span class='hs-conid'>Pi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-varid'>h'</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>|</span>
<a name="line-1121"></a> <span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-varid'>h'</span> <span class='hs-varop'>&&</span> <span class='hs-layout'>(</span><span class='hs-varid'>h</span> <span class='hs-varop'>==</span> <span class='hs-conid'>NotHidden</span> <span class='hs-varop'>||</span> <span class='hs-varid'>sameName</span> <span class='hs-layout'>(</span><span class='hs-varid'>nameOf</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>nameInPi</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>t0'</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-1122"></a> <span class='hs-varid'>u</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-varid'>applyRelevanceToContext</span> <span class='hs-varid'>rel</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>e'</span> <span class='hs-varid'>a</span>
<a name="line-1123"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>arg</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Arg</span> <span class='hs-varid'>h</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>u</span> <span class='hs-comment'>-- save relevance info in argument</span>
<a name="line-1124"></a> <span class='hs-layout'>(</span><span class='hs-varid'>us</span><span class='hs-layout'>,</span> <span class='hs-varid'>t0''</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkArguments</span> <span class='hs-varid'>exh</span> <span class='hs-varid'>expandIFS</span> <span class='hs-layout'>(</span><span class='hs-varid'>fuseRange</span> <span class='hs-varid'>r</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span> <span class='hs-layout'>(</span><span class='hs-varid'>piApply</span> <span class='hs-varid'>t0'</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>arg</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varid'>t1</span>
<a name="line-1125"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>arg</span> <span class='hs-conop'>:</span> <span class='hs-varid'>us</span><span class='hs-layout'>,</span> <span class='hs-varid'>t0''</span><span class='hs-layout'>)</span>
<a name="line-1126"></a><span class='hs-comment'>{- UNUSED. 2012-04-02 do not insert DontCare (is redundant anyway)
<a name="line-1127"></a> where nukeIfIrrelevant arg =
<a name="line-1128"></a> if argRelevance arg == Irrelevant then
<a name="line-1129"></a> -- Andreas, 2011-09-09 keep irr. args. until after termination checking
<a name="line-1130"></a> arg { unArg = DontCare $ unArg arg }
<a name="line-1131"></a> else arg
<a name="line-1132"></a>-}</span>
<a name="line-1133"></a> <span class='hs-conid'>Pi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-conid'>Instance</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>expandIFS</span> <span class='hs-varop'>==</span> <span class='hs-conid'>ExpandInstanceArguments</span> <span class='hs-keyglyph'>-></span>
<a name="line-1134"></a> <span class='hs-varid'>insertIFSUnderscore</span> <span class='hs-varid'>rel</span> <span class='hs-layout'>(</span><span class='hs-varid'>absName</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span>
<a name="line-1135"></a> <span class='hs-conid'>Pi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-conid'>Hidden</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>insertUnderscore</span> <span class='hs-varid'>rel</span> <span class='hs-layout'>(</span><span class='hs-varid'>absName</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-1136"></a> <span class='hs-conid'>Pi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-conid'>NotHidden</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>WrongHidingInApplication</span> <span class='hs-varid'>t0'</span>
<a name="line-1137"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>ShouldBePi</span> <span class='hs-varid'>t0'</span>
<a name="line-1138"></a> <span class='hs-keyword'>where</span>
<a name="line-1139"></a> <span class='hs-varid'>insertIFSUnderscore</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>x</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-1140"></a> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reportSLn</span> <span class='hs-str'>"tc.term.args.ifs"</span> <span class='hs-num'>15</span> <span class='hs-varop'>$</span> <span class='hs-str'>"inserting implicit meta (2) for type "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>a</span>
<a name="line-1141"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-varid'>applyRelevanceToContext</span> <span class='hs-varid'>rel</span> <span class='hs-varop'>$</span> <span class='hs-varid'>initializeIFSMeta</span> <span class='hs-varid'>x</span> <span class='hs-varid'>a</span>
<a name="line-1142"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>arg</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Arg</span> <span class='hs-conid'>Instance</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>v</span>
<a name="line-1143"></a> <span class='hs-layout'>(</span><span class='hs-varid'>vs</span><span class='hs-layout'>,</span> <span class='hs-varid'>t0''</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkArguments</span> <span class='hs-varid'>exh</span> <span class='hs-varid'>expandIFS</span> <span class='hs-varid'>r</span> <span class='hs-varid'>args0</span> <span class='hs-layout'>(</span><span class='hs-varid'>piApply</span> <span class='hs-varid'>t0</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>arg</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varid'>t1</span>
<a name="line-1144"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>arg</span> <span class='hs-conop'>:</span> <span class='hs-varid'>vs</span><span class='hs-layout'>,</span> <span class='hs-varid'>t0''</span><span class='hs-layout'>)</span>
<a name="line-1145"></a>
<a name="line-1146"></a> <span class='hs-varid'>insertUnderscore</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-1147"></a> <span class='hs-varid'>scope</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-varop'>$</span> <span class='hs-varid'>getScope</span>
<a name="line-1148"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Underscore</span> <span class='hs-varop'>$</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>MetaInfo</span>
<a name="line-1149"></a> <span class='hs-layout'>{</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaRange</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>r</span>
<a name="line-1150"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaScope</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>scope</span>
<a name="line-1151"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaNumber</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-1152"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-varid'>metaNameSuggestion</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-1153"></a> <span class='hs-layout'>}</span>
<a name="line-1154"></a> <span class='hs-varid'>checkArguments</span> <span class='hs-varid'>exh</span> <span class='hs-varid'>expandIFS</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arg</span> <span class='hs-conid'>Hidden</span> <span class='hs-varid'>rel</span> <span class='hs-layout'>(</span><span class='hs-varid'>unnamed</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-conop'>:</span> <span class='hs-varid'>args0</span><span class='hs-layout'>)</span> <span class='hs-varid'>t0</span> <span class='hs-varid'>t1</span>
<a name="line-1155"></a>
<a name="line-1156"></a> <span class='hs-varid'>name</span> <span class='hs-layout'>(</span><span class='hs-conid'>Named</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Var</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varid'>x</span>
<a name="line-1157"></a> <span class='hs-varid'>name</span> <span class='hs-layout'>(</span><span class='hs-conid'>Named</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-1158"></a> <span class='hs-varid'>name</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"x"</span>
<a name="line-1159"></a>
<a name="line-1160"></a> <span class='hs-varid'>sameName</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-1161"></a> <span class='hs-varid'>sameName</span> <span class='hs-varid'>n1</span> <span class='hs-varid'>n2</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>n2</span>
<a name="line-1162"></a>
<a name="line-1163"></a> <span class='hs-varid'>nameInPi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Pi</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>absName</span> <span class='hs-varid'>b</span>
<a name="line-1164"></a> <span class='hs-varid'>nameInPi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Shared</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nameInPi</span> <span class='hs-layout'>(</span><span class='hs-varid'>derefPtr</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-1165"></a> <span class='hs-varid'>nameInPi</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-1166"></a>
<a name="line-1167"></a>
<a name="line-1168"></a><a name="checkArguments_"></a><span class='hs-comment'>-- | Check that a list of arguments fits a telescope.</span>
<a name="line-1169"></a><span class='hs-definition'>checkArguments_</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ExpandHidden</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Range</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>NamedArg</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Telescope</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Args</span>
<a name="line-1170"></a><span class='hs-definition'>checkArguments_</span> <span class='hs-varid'>exh</span> <span class='hs-varid'>r</span> <span class='hs-varid'>args</span> <span class='hs-varid'>tel</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-1171"></a> <span class='hs-varid'>z</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runErrorT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkArguments</span> <span class='hs-varid'>exh</span> <span class='hs-conid'>ExpandInstanceArguments</span> <span class='hs-varid'>r</span> <span class='hs-varid'>args</span> <span class='hs-layout'>(</span><span class='hs-varid'>telePi</span> <span class='hs-varid'>tel</span> <span class='hs-varop'>$</span> <span class='hs-varid'>sort</span> <span class='hs-conid'>Prop</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>sort</span> <span class='hs-conid'>Prop</span><span class='hs-layout'>)</span>
<a name="line-1172"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>z</span> <span class='hs-keyword'>of</span>
<a name="line-1173"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>args</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>args</span>
<a name="line-1174"></a> <span class='hs-conid'>Left</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-1175"></a>
<a name="line-1176"></a>
<a name="line-1177"></a><a name="inferExpr"></a><span class='hs-comment'>-- | Infer the type of an expression. Implemented by checking against a meta</span>
<a name="line-1178"></a><span class='hs-comment'>-- variable. Except for neutrals, for them a polymorphic type is inferred.</span>
<a name="line-1179"></a><span class='hs-definition'>inferExpr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Term</span><span class='hs-layout'>,</span> <span class='hs-conid'>Type</span><span class='hs-layout'>)</span>
<a name="line-1180"></a><span class='hs-definition'>inferExpr</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>inferOrCheck</span> <span class='hs-varid'>e</span> <span class='hs-conid'>Nothing</span>
<a name="line-1181"></a><span class='hs-comment'>{-
<a name="line-1182"></a>case e of
<a name="line-1183"></a> _ | Application hd args <- appView e, defOrVar hd -> traceCall (InferExpr e) $ do
<a name="line-1184"></a> (f, t0) <- inferHead hd
<a name="line-1185"></a> res <- runErrorT $ checkArguments DontExpandLast ExpandInstanceArguments (getRange hd) args t0 (sort Prop)
<a name="line-1186"></a> case res of
<a name="line-1187"></a> Right (vs, t1) -> return (f vs, t1)
<a name="line-1188"></a> Left t1 -> fallback -- blocked on type t1
<a name="line-1189"></a> _ -> fallback
<a name="line-1190"></a> where
<a name="line-1191"></a> fallback = do
<a name="line-1192"></a> t <- workOnTypes $ newTypeMeta_
<a name="line-1193"></a> v <- checkExpr e t
<a name="line-1194"></a> return (v,t)
<a name="line-1195"></a>-}</span>
<a name="line-1196"></a>
<a name="line-1197"></a><a name="defOrVar"></a><span class='hs-definition'>defOrVar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-1198"></a><span class='hs-definition'>defOrVar</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Var</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-1199"></a><span class='hs-definition'>defOrVar</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Def</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-1200"></a><span class='hs-definition'>defOrVar</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-1201"></a>
<a name="line-1202"></a><a name="inferOrCheck"></a><span class='hs-definition'>inferOrCheck</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Term</span><span class='hs-layout'>,</span> <span class='hs-conid'>Type</span><span class='hs-layout'>)</span>
<a name="line-1203"></a><span class='hs-definition'>inferOrCheck</span> <span class='hs-varid'>e</span> <span class='hs-varid'>mt</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-1204"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Application</span> <span class='hs-varid'>hd</span> <span class='hs-varid'>args</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>appView</span> <span class='hs-varid'>e</span><span class='hs-layout'>,</span> <span class='hs-varid'>defOrVar</span> <span class='hs-varid'>hd</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>traceCall</span> <span class='hs-layout'>(</span><span class='hs-conid'>InferExpr</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-1205"></a> <span class='hs-layout'>(</span><span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-varid'>t0</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferHead</span> <span class='hs-varid'>hd</span>
<a name="line-1206"></a> <span class='hs-varid'>res</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>runErrorT</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkArguments</span> <span class='hs-conid'>DontExpandLast</span> <span class='hs-conid'>ExpandInstanceArguments</span> <span class='hs-layout'>(</span><span class='hs-varid'>getRange</span> <span class='hs-varid'>hd</span><span class='hs-layout'>)</span> <span class='hs-varid'>args</span> <span class='hs-varid'>t0</span> <span class='hs-varop'>$</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>sort</span> <span class='hs-conid'>Prop</span><span class='hs-layout'>)</span> <span class='hs-varid'>id</span> <span class='hs-varid'>mt</span>
<a name="line-1207"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>res</span> <span class='hs-keyword'>of</span>
<a name="line-1208"></a> <span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>vs</span><span class='hs-layout'>,</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>vs</span><span class='hs-layout'>,</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-1209"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varop'><$></span> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>vs</span><span class='hs-layout'>)</span> <span class='hs-varid'>t1</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1210"></a> <span class='hs-varid'>mt</span>
<a name="line-1211"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>t1</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fallback</span> <span class='hs-comment'>-- blocked on type t1</span>
<a name="line-1212"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fallback</span>
<a name="line-1213"></a> <span class='hs-keyword'>where</span>
<a name="line-1214"></a> <span class='hs-varid'>fallback</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-1215"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>workOnTypes</span> <span class='hs-varop'>$</span> <span class='hs-varid'>newTypeMeta_</span><span class='hs-layout'>)</span> <span class='hs-varid'>return</span> <span class='hs-varid'>mt</span>
<a name="line-1216"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span>
<a name="line-1217"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>v</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1218"></a>
<a name="line-1219"></a><a name="inferExprForWith"></a><span class='hs-comment'>-- | Infer the type of an expression, and if it is of the form</span>
<a name="line-1220"></a><span class='hs-comment'>-- @{tel} -> D vs@ for some datatype @D@ then insert the hidden</span>
<a name="line-1221"></a><span class='hs-comment'>-- arguments. Otherwise, leave the type polymorphic.</span>
<a name="line-1222"></a><span class='hs-definition'>inferExprForWith</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>Expr</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Term</span><span class='hs-layout'>,</span> <span class='hs-conid'>Type</span><span class='hs-layout'>)</span>
<a name="line-1223"></a><span class='hs-definition'>inferExprForWith</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-1224"></a> <span class='hs-layout'>(</span><span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferExpr</span> <span class='hs-varid'>e</span>
<a name="line-1225"></a> <span class='hs-conid'>TelV</span> <span class='hs-varid'>tel</span> <span class='hs-varid'>t0</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>telViewUpTo'</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>NotHidden</span> <span class='hs-varop'>/=</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>domHiding</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-1226"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>ignoreSharing</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unEl</span> <span class='hs-varid'>t0</span> <span class='hs-keyword'>of</span>
<a name="line-1227"></a> <span class='hs-conid'>Def</span> <span class='hs-varid'>d</span> <span class='hs-varid'>vs</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-1228"></a> <span class='hs-varid'>res</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isDataOrRecordType</span> <span class='hs-varid'>d</span>
<a name="line-1229"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>res</span> <span class='hs-keyword'>of</span>
<a name="line-1230"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1231"></a> <span class='hs-conid'>Just</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-1232"></a> <span class='hs-layout'>(</span><span class='hs-varid'>args</span><span class='hs-layout'>,</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>implicitArgs</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-num'>1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>NotHidden</span> <span class='hs-varop'>/=</span><span class='hs-layout'>)</span> <span class='hs-varid'>t</span>
<a name="line-1233"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>v</span> <span class='hs-varop'>`apply`</span> <span class='hs-varid'>args</span><span class='hs-layout'>,</span> <span class='hs-varid'>t1</span><span class='hs-layout'>)</span>
<a name="line-1234"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span>
<a name="line-1235"></a>
<a name="line-1236"></a><a name="checkTerm"></a><span class='hs-definition'>checkTerm</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Term</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Term</span>
<a name="line-1237"></a><span class='hs-definition'>checkTerm</span> <span class='hs-varid'>tm</span> <span class='hs-varid'>ty</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>atm</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>reify</span> <span class='hs-varid'>tm</span>
<a name="line-1238"></a> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>atm</span> <span class='hs-varid'>ty</span>
<a name="line-1239"></a>
<a name="line-1240"></a><span class='hs-comment'>---------------------------------------------------------------------------</span>
<a name="line-1241"></a><span class='hs-comment'>-- * Let bindings</span>
<a name="line-1242"></a><span class='hs-comment'>---------------------------------------------------------------------------</span>
<a name="line-1243"></a>
<a name="line-1244"></a><a name="checkLetBindings"></a><span class='hs-definition'>checkLetBindings</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LetBinding</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span>
<a name="line-1245"></a><span class='hs-definition'>checkLetBindings</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-varop'>.</span><span class='hs-layout'>)</span> <span class='hs-varid'>id</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-varid'>checkLetBinding</span>
<a name="line-1246"></a>
<a name="line-1247"></a><a name="checkLetBinding"></a><span class='hs-definition'>checkLetBinding</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LetBinding</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span>
<a name="line-1248"></a>
<a name="line-1249"></a><span class='hs-definition'>checkLetBinding</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LetBind</span> <span class='hs-varid'>i</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>x</span> <span class='hs-varid'>t</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>ret</span> <span class='hs-keyglyph'>=</span>
<a name="line-1250"></a> <span class='hs-varid'>traceCallCPS_</span> <span class='hs-layout'>(</span><span class='hs-conid'>CheckLetBinding</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>ret</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>ret</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-1251"></a> <span class='hs-varid'>t</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>isType_</span> <span class='hs-varid'>t</span>
<a name="line-1252"></a> <span class='hs-varid'>v</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>applyRelevanceToContext</span> <span class='hs-varid'>rel</span> <span class='hs-varop'>$</span> <span class='hs-varid'>checkExpr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>t</span>
<a name="line-1253"></a> <span class='hs-varid'>addLetBinding</span> <span class='hs-varid'>rel</span> <span class='hs-varid'>x</span> <span class='hs-varid'>v</span> <span class='hs-varid'>t</span> <span class='hs-varid'>ret</span>
<a name="line-1254"></a>
<a name="line-1255"></a><span class='hs-definition'>checkLetBinding</span> <span class='hs-varid'>b</span><span class='hs-keyglyph'>@</span><span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LetPatBind</span> <span class='hs-varid'>i</span> <span class='hs-varid'>p</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>ret</span> <span class='hs-keyglyph'>=</span>
<a name="line-1256"></a> <span class='hs-varid'>traceCallCPS_</span> <span class='hs-layout'>(</span><span class='hs-conid'>CheckLetBinding</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>ret</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>ret</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-1257"></a> <span class='hs-layout'>(</span><span class='hs-varid'>v</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>inferExpr</span> <span class='hs-varid'>e</span>
<a name="line-1258"></a> <span class='hs-keyword'>let</span> <span class='hs-comment'>-- construct a type t -> dummy for use in checkLeftHandSide</span>
<a name="line-1259"></a> <span class='hs-varid'>t0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>El</span> <span class='hs-layout'>(</span><span class='hs-varid'>getSort</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Pi</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dom</span> <span class='hs-conid'>NotHidden</span> <span class='hs-conid'>Relevant</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>NoAbs</span> <span class='hs-str'>"_"</span> <span class='hs-varid'>typeDontCare</span><span class='hs-layout'>)</span>
<a name="line-1260"></a> <span class='hs-varid'>p0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Arg</span> <span class='hs-conid'>NotHidden</span> <span class='hs-conid'>Relevant</span> <span class='hs-layout'>(</span><span class='hs-conid'>Named</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-1261"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.let.pattern"</span> <span class='hs-num'>10</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-1262"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"let-binding pattern p at type t"</span>
<a name="line-1263"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-1264"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"p (A) ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- prettyTCM p</span>
<a name="line-1265"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"t ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>t</span>
<a name="line-1266"></a> <span class='hs-keyglyph'>]</span>
<a name="line-1267"></a> <span class='hs-keyglyph'>]</span>
<a name="line-1268"></a> <span class='hs-varid'>checkLeftHandSide</span> <span class='hs-layout'>(</span><span class='hs-conid'>CheckPattern</span> <span class='hs-varid'>p</span> <span class='hs-conid'>EmptyTel</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>p0</span><span class='hs-keyglyph'>]</span> <span class='hs-varid'>t0</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span> <span class='hs-varid'>mgamma</span> <span class='hs-varid'>delta</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ps</span> <span class='hs-varid'>t'</span> <span class='hs-varid'>perm</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-1269"></a> <span class='hs-comment'>-- A single pattern in internal syntax is returned.</span>
<a name="line-1270"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>p</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>ps</span> <span class='hs-keyword'>of</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>p</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>unArg</span> <span class='hs-varid'>p</span><span class='hs-layout'>;</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-sel'>__IMPOSSIBLE__</span>
<a name="line-1271"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.let.pattern"</span> <span class='hs-num'>20</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-1272"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"p (I) ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>p</span><span class='hs-layout'>)</span>
<a name="line-1273"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"delta ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>delta</span><span class='hs-layout'>)</span>
<a name="line-1274"></a> <span class='hs-keyglyph'>]</span>
<a name="line-1275"></a> <span class='hs-comment'>-- We translate it into a list of projections.</span>
<a name="line-1276"></a> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>recordPatternToProjections</span> <span class='hs-varid'>p</span>
<a name="line-1277"></a> <span class='hs-comment'>-- We remove the bindings for the pattern variables from the context.</span>
<a name="line-1278"></a> <span class='hs-varid'>cxt0</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getContext</span>
<a name="line-1279"></a> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>binds</span><span class='hs-layout'>,</span> <span class='hs-varid'>cxt</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitAt</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>delta</span><span class='hs-layout'>)</span> <span class='hs-varid'>cxt0</span>
<a name="line-1280"></a> <span class='hs-varid'>escapeContext</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>binds</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-1281"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.let.pattern"</span> <span class='hs-num'>20</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-1282"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"delta ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>prettyTCM</span> <span class='hs-varid'>delta</span>
<a name="line-1283"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"binds ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>binds</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- prettyTCM binds</span>
<a name="line-1284"></a> <span class='hs-keyglyph'>]</span>
<a name="line-1285"></a><span class='hs-comment'>{- WE CANNOT USE THIS BINDING
<a name="line-1286"></a> -- We add a first let-binding for the value of e.
<a name="line-1287"></a> x <- freshNoName (getRange e)
<a name="line-1288"></a> addLetBinding Relevant x v t $ do
<a name="line-1289"></a> -}</span>
<a name="line-1290"></a> <span class='hs-comment'>-- We create a substitution for the let-bound variables</span>
<a name="line-1291"></a> <span class='hs-comment'>-- (unfortunately, we cannot refer to x in internal syntax</span>
<a name="line-1292"></a> <span class='hs-comment'>-- so we have to copy v).</span>
<a name="line-1293"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>sigma</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>zipWith</span> <span class='hs-layout'>(</span><span class='hs-varop'>$</span><span class='hs-layout'>)</span> <span class='hs-varid'>fs</span> <span class='hs-layout'>(</span><span class='hs-varid'>repeat</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span>
<a name="line-1294"></a> <span class='hs-comment'>-- We apply the types of the let bound-variables to this substitution.</span>
<a name="line-1295"></a> <span class='hs-comment'>-- The 0th variable in a context is the last one, so we reverse.</span>
<a name="line-1296"></a> <span class='hs-comment'>-- Further, we need to lower all other de Bruijn indices by</span>
<a name="line-1297"></a> <span class='hs-comment'>-- the size of delta, so we append the identity substitution.</span>
<a name="line-1298"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>sub</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>parallelS</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>sigma</span><span class='hs-layout'>)</span>
<a name="line-1299"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>fdelta</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>flattenTel</span> <span class='hs-varid'>delta</span>
<a name="line-1300"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.let.pattern"</span> <span class='hs-num'>20</span> <span class='hs-varop'>$</span> <span class='hs-varid'>nest</span> <span class='hs-num'>2</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-1301"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"fdelta ="</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>show</span> <span class='hs-varid'>fdelta</span><span class='hs-layout'>)</span>
<a name="line-1302"></a> <span class='hs-keyglyph'>]</span>
<a name="line-1303"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>tsl</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>applySubst</span> <span class='hs-varid'>sub</span> <span class='hs-varid'>fdelta</span>
<a name="line-1304"></a> <span class='hs-comment'>-- We get a list of types</span>
<a name="line-1305"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>ts</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>unDom</span> <span class='hs-varid'>tsl</span>
<a name="line-1306"></a> <span class='hs-comment'>-- and relevances.</span>
<a name="line-1307"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>rels</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-varid'>domRelevance</span> <span class='hs-varid'>tsl</span>
<a name="line-1308"></a> <span class='hs-comment'>-- We get list of names of the let-bound vars from the context.</span>
<a name="line-1309"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>fst</span> <span class='hs-varop'>.</span> <span class='hs-varid'>unDom</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varid'>binds</span><span class='hs-layout'>)</span>
<a name="line-1310"></a> <span class='hs-comment'>-- We add all the bindings to the context.</span>
<a name="line-1311"></a> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-varid'>uncurry4</span> <span class='hs-varid'>addLetBinding</span><span class='hs-layout'>)</span> <span class='hs-varid'>ret</span> <span class='hs-varop'>$</span> <span class='hs-varid'>zip4</span> <span class='hs-varid'>rels</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>sigma</span> <span class='hs-varid'>ts</span>
<a name="line-1312"></a>
<a name="line-1313"></a><span class='hs-definition'>checkLetBinding</span> <span class='hs-layout'>(</span><span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LetApply</span> <span class='hs-varid'>i</span> <span class='hs-varid'>x</span> <span class='hs-varid'>modapp</span> <span class='hs-varid'>rd</span> <span class='hs-varid'>rm</span><span class='hs-layout'>)</span> <span class='hs-varid'>ret</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-1314"></a> <span class='hs-comment'>-- Any variables in the context that doesn't belong to the current</span>
<a name="line-1315"></a> <span class='hs-comment'>-- module should go with the new module.</span>
<a name="line-1316"></a> <span class='hs-comment'>-- fv <- getDefFreeVars =<< (qnameFromList . mnameToList) <$> currentModule</span>
<a name="line-1317"></a> <span class='hs-varid'>fv</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getModuleFreeVars</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>currentModule</span>
<a name="line-1318"></a> <span class='hs-varid'>n</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>size</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getContext</span>
<a name="line-1319"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>new</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>n</span> <span class='hs-comment'>-</span> <span class='hs-varid'>fv</span>
<a name="line-1320"></a> <span class='hs-varid'>reportSLn</span> <span class='hs-str'>"tc.term.let.apply"</span> <span class='hs-num'>10</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Applying "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>modapp</span> <span class='hs-varop'>++</span> <span class='hs-str'>" with "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>new</span> <span class='hs-varop'>++</span> <span class='hs-str'>" free variables"</span>
<a name="line-1321"></a> <span class='hs-varid'>reportSDoc</span> <span class='hs-str'>"tc.term.let.apply"</span> <span class='hs-num'>20</span> <span class='hs-varop'>$</span> <span class='hs-varid'>vcat</span>
<a name="line-1322"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>text</span> <span class='hs-str'>"context ="</span> <span class='hs-varop'><+></span> <span class='hs-layout'>(</span><span class='hs-varid'>prettyTCM</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>getContextTelescope</span><span class='hs-layout'>)</span>
<a name="line-1323"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"module ="</span> <span class='hs-varop'><+></span> <span class='hs-layout'>(</span><span class='hs-varid'>prettyTCM</span> <span class='hs-varop'>=<<</span> <span class='hs-varid'>currentModule</span><span class='hs-layout'>)</span>
<a name="line-1324"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-str'>"fv ="</span> <span class='hs-varop'><+></span> <span class='hs-layout'>(</span><span class='hs-varid'>text</span> <span class='hs-varop'>$</span> <span class='hs-varid'>show</span> <span class='hs-varid'>fv</span><span class='hs-layout'>)</span>
<a name="line-1325"></a> <span class='hs-keyglyph'>]</span>
<a name="line-1326"></a> <span class='hs-varid'>checkSectionApplication</span> <span class='hs-varid'>i</span> <span class='hs-varid'>x</span> <span class='hs-varid'>modapp</span> <span class='hs-varid'>rd</span> <span class='hs-varid'>rm</span>
<a name="line-1327"></a> <span class='hs-varid'>withAnonymousModule</span> <span class='hs-varid'>x</span> <span class='hs-varid'>new</span> <span class='hs-varid'>ret</span>
<a name="line-1328"></a><span class='hs-comment'>-- LetOpen is only used for highlighting and has no semantics</span>
<a name="line-1329"></a><span class='hs-definition'>checkLetBinding</span> <span class='hs-conid'>A</span><span class='hs-varop'>.</span><span class='hs-conid'>LetOpen</span><span class='hs-layout'>{</span><span class='hs-layout'>}</span> <span class='hs-varid'>ret</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ret</span>
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