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<title>src/full/Agda/Compiler/MAlonzo/Encode.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- Module name encoding</span>
<a name="line-3"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-4"></a>
<a name="line-5"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Compiler</span><span class='hs-varop'>.</span><span class='hs-conid'>MAlonzo</span><span class='hs-varop'>.</span><span class='hs-conid'>Encode</span>
<a name="line-6"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>encodeModuleName</span>
<a name="line-7"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>tests</span>
<a name="line-8"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-9"></a>
<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'>Char</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'>Function</span>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>Exts</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>HS</span>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>QuickCheck</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'>Compiler</span><span class='hs-varop'>.</span><span class='hs-conid'>MAlonzo</span><span class='hs-varop'>.</span><span class='hs-conid'>Misc</span>
<a name="line-17"></a>
<a name="line-18"></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'>QuickCheck</span>
<a name="line-19"></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'>TestHelpers</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='hs-comment'>-- | Can the character be used in a Haskell module name part</span>
<a name="line-22"></a><span class='hs-comment'>-- (@conid@)? This function is more restrictive than what the Haskell</span>
<a name="line-23"></a><span class='hs-comment'>-- report allows.</span>
<a name="line-24"></a>
<a name="line-25"></a><a name="isModChar"></a><span class='hs-definition'>isModChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-26"></a><span class='hs-definition'>isModChar</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span>
<a name="line-27"></a> <span class='hs-varid'>isLower</span> <span class='hs-varid'>c</span> <span class='hs-varop'>||</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'_'</span> <span class='hs-varop'>||</span> <span class='hs-varid'>isUpper</span> <span class='hs-varid'>c</span> <span class='hs-varop'>||</span> <span class='hs-varid'>isDigit</span> <span class='hs-varid'>c</span> <span class='hs-varop'>||</span> <span class='hs-varid'>c</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'\''</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-comment'>-- | Haskell module names have to satisfy the Haskell (including the</span>
<a name="line-30"></a><span class='hs-comment'>-- hierarchical module namespace extension) lexical syntax:</span>
<a name="line-31"></a><span class='hs-comment'>--</span>
<a name="line-32"></a><span class='hs-comment'>-- @modid -> [modid.] large {small | large | digit | ' }@</span>
<a name="line-33"></a><span class='hs-comment'>--</span>
<a name="line-34"></a><span class='hs-comment'>-- 'encodeModuleName' is an injective function into the set of module</span>
<a name="line-35"></a><span class='hs-comment'>-- names defined by @modid@. The function preserves @.@s, and it also</span>
<a name="line-36"></a><span class='hs-comment'>-- preserves module names whose first name part is not 'mazstr'.</span>
<a name="line-37"></a><span class='hs-comment'>--</span>
<a name="line-38"></a><span class='hs-comment'>-- Precondition: The input must not start or end with @.@, and no two</span>
<a name="line-39"></a><span class='hs-comment'>-- @.@s may be adjacent.</span>
<a name="line-40"></a>
<a name="line-41"></a><a name="encodeModuleName"></a><span class='hs-definition'>encodeModuleName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>HS</span><span class='hs-varop'>.</span><span class='hs-conid'>ModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>HS</span><span class='hs-varop'>.</span><span class='hs-conid'>ModuleName</span>
<a name="line-42"></a><span class='hs-definition'>encodeModuleName</span> <span class='hs-layout'>(</span><span class='hs-conid'>HS</span><span class='hs-varop'>.</span><span class='hs-conid'>ModuleName</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>HS</span><span class='hs-varop'>.</span><span class='hs-conid'>ModuleName</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>splitUp</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-43"></a> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>mazstr'</span> <span class='hs-varop'>`isPrefixOf`</span> <span class='hs-varid'>ps</span> <span class='hs-keyglyph'>-></span>
<a name="line-44"></a> <span class='hs-varid'>concat</span> <span class='hs-layout'>(</span><span class='hs-varid'>mazstr'</span> <span class='hs-varop'>++</span> <span class='hs-varid'>map</span> <span class='hs-varid'>encNamePart</span> <span class='hs-layout'>(</span><span class='hs-varid'>drop</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>mazstr'</span><span class='hs-layout'>)</span> <span class='hs-varid'>ps</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-45"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span>
<a name="line-46"></a> <span class='hs-keyword'>where</span>
<a name="line-47"></a> <span class='hs-comment'>-- splitUp ".apa.bepa." == [".","apa",".","bepa","."]</span>
<a name="line-48"></a> <span class='hs-varid'>splitUp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>groupBy</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>&&</span><span class='hs-layout'>)</span> <span class='hs-varop'>`on`</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>
<a name="line-49"></a>
<a name="line-50"></a> <span class='hs-varid'>mazstr'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitUp</span> <span class='hs-varid'>mazstr</span>
<a name="line-51"></a>
<a name="line-52"></a> <span class='hs-varid'>encNamePart</span> <span class='hs-str'>"."</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"."</span>
<a name="line-53"></a> <span class='hs-varid'>encNamePart</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ensureFirstCharLarge</span> <span class='hs-varid'>s</span> <span class='hs-varop'>++</span> <span class='hs-varid'>concatMap</span> <span class='hs-varid'>enc</span> <span class='hs-varid'>s</span>
<a name="line-54"></a>
<a name="line-55"></a> <span class='hs-varid'>ensureFirstCharLarge</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-56"></a> <span class='hs-varid'>c</span> <span class='hs-conop'>:</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isUpper</span> <span class='hs-varid'>c</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>c</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>largeChar</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>""</span>
<a name="line-57"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>largeChar</span><span class='hs-keyglyph'>]</span>
<a name="line-58"></a>
<a name="line-59"></a> <span class='hs-varid'>largeChar</span> <span class='hs-keyglyph'>=</span> <span class='hs-chr'>'Q'</span>
<a name="line-60"></a> <span class='hs-varid'>escapeChar</span> <span class='hs-keyglyph'>=</span> <span class='hs-chr'>'Z'</span>
<a name="line-61"></a>
<a name="line-62"></a> <span class='hs-varid'>isOK</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span> <span class='hs-varop'>/=</span> <span class='hs-varid'>escapeChar</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isModChar</span> <span class='hs-varid'>c</span>
<a name="line-63"></a>
<a name="line-64"></a> <span class='hs-varid'>enc</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isOK</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>c</span><span class='hs-keyglyph'>]</span>
<a name="line-65"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>escapeChar</span><span class='hs-keyglyph'>]</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromEnum</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varop'>++</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>escapeChar</span><span class='hs-keyglyph'>]</span>
<a name="line-66"></a>
<a name="line-67"></a><span class='hs-comment'>-- Note: This injectivity test is quite weak. A better, dedicated</span>
<a name="line-68"></a><span class='hs-comment'>-- generator could strengthen it.</span>
<a name="line-69"></a>
<a name="line-70"></a><a name="prop_encodeModuleName_injective"></a><span class='hs-definition'>prop_encodeModuleName_injective</span> <span class='hs-layout'>(</span><span class='hs-conid'>M</span> <span class='hs-varid'>s1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>M</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-71"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>encodeModuleName</span> <span class='hs-layout'>(</span><span class='hs-conid'>HS</span><span class='hs-varop'>.</span><span class='hs-conid'>ModuleName</span> <span class='hs-varid'>s1</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span>
<a name="line-72"></a> <span class='hs-varid'>encodeModuleName</span> <span class='hs-layout'>(</span><span class='hs-conid'>HS</span><span class='hs-varop'>.</span><span class='hs-conid'>ModuleName</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span>
<a name="line-73"></a> <span class='hs-varid'>s1</span> <span class='hs-varop'>==</span> <span class='hs-varid'>s2</span>
<a name="line-74"></a> <span class='hs-keyword'>else</span>
<a name="line-75"></a> <span class='hs-conid'>True</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="prop_encodeModuleName_OK"></a><span class='hs-definition'>prop_encodeModuleName_OK</span> <span class='hs-layout'>(</span><span class='hs-conid'>M</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-78"></a> <span class='hs-varid'>s</span> <span class='hs-varop'>~=</span> <span class='hs-varid'>unM</span> <span class='hs-layout'>(</span><span class='hs-varid'>encodeModuleName</span> <span class='hs-layout'>(</span><span class='hs-conid'>HS</span><span class='hs-varop'>.</span><span class='hs-conid'>ModuleName</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-79"></a> <span class='hs-keyword'>where</span>
<a name="line-80"></a> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mazstr</span> <span class='hs-varop'>++</span> <span class='hs-str'>"."</span> <span class='hs-varop'>++</span> <span class='hs-varid'>s'</span>
<a name="line-81"></a>
<a name="line-82"></a> <span class='hs-str'>""</span> <span class='hs-varop'>~=</span> <span class='hs-str'>""</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-83"></a> <span class='hs-layout'>(</span><span class='hs-chr'>'.'</span> <span class='hs-conop'>:</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-varop'>~=</span> <span class='hs-layout'>(</span><span class='hs-chr'>'.'</span> <span class='hs-conop'>:</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span> <span class='hs-varop'>~=</span> <span class='hs-varid'>s'</span>
<a name="line-84"></a> <span class='hs-varid'>s</span> <span class='hs-varop'>~=</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-conop'>:</span> <span class='hs-varid'>s'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isUpper</span> <span class='hs-varid'>c</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>all</span> <span class='hs-varid'>isModChar</span> <span class='hs-varid'>s1'</span> <span class='hs-varop'>&&</span>
<a name="line-85"></a> <span class='hs-varid'>dropWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-chr'>'.'</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-varop'>~=</span> <span class='hs-varid'>s2'</span>
<a name="line-86"></a> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>s1'</span><span class='hs-layout'>,</span> <span class='hs-varid'>s2'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-chr'>'.'</span><span class='hs-layout'>)</span> <span class='hs-varid'>s'</span>
<a name="line-87"></a> <span class='hs-keyword'>_</span> <span class='hs-varop'>~=</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-88"></a>
<a name="line-89"></a> <span class='hs-varid'>unM</span> <span class='hs-layout'>(</span><span class='hs-conid'>HS</span><span class='hs-varop'>.</span><span class='hs-conid'>ModuleName</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="prop_encodeModuleName_preserved"></a><span class='hs-definition'>prop_encodeModuleName_preserved</span> <span class='hs-layout'>(</span><span class='hs-conid'>M</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-92"></a> <span class='hs-varid'>shouldBePreserved</span> <span class='hs-varid'>m</span> <span class='hs-varop'>==></span>
<a name="line-93"></a> <span class='hs-varid'>encodeModuleName</span> <span class='hs-layout'>(</span><span class='hs-conid'>HS</span><span class='hs-varop'>.</span><span class='hs-conid'>ModuleName</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-conid'>HS</span><span class='hs-varop'>.</span><span class='hs-conid'>ModuleName</span> <span class='hs-varid'>m</span>
<a name="line-94"></a> <span class='hs-keyword'>where</span>
<a name="line-95"></a> <span class='hs-varid'>shouldBePreserved</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-96"></a> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varop'>==</span> <span class='hs-varid'>mazstr</span> <span class='hs-varop'>||</span> <span class='hs-layout'>(</span><span class='hs-varid'>mazstr</span> <span class='hs-varop'>++</span> <span class='hs-str'>"."</span><span class='hs-layout'>)</span> <span class='hs-varop'>`isPrefixOf`</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-97"></a>
<a name="line-98"></a><span class='hs-comment'>-- | Agda module names. Used to test 'encodeModuleName'.</span>
<a name="line-99"></a>
<a name="line-100"></a><a name="M"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>M</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>M</span> <span class='hs-conid'>String</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-101"></a>
<a name="line-102"></a><a name="instance%20Arbitrary%20M"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Arbitrary</span> <span class='hs-conid'>M</span> <span class='hs-keyword'>where</span>
<a name="line-103"></a> <span class='hs-varid'>arbitrary</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-104"></a> <span class='hs-varid'>ms</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>choose</span> <span class='hs-layout'>(</span><span class='hs-num'>0</span><span class='hs-layout'>,</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span>
<a name="line-105"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>vectorOf</span> <span class='hs-varid'>ms</span> <span class='hs-varid'>namePart</span>
<a name="line-106"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>M</span> <span class='hs-layout'>(</span><span class='hs-varid'>intercalate</span> <span class='hs-str'>"."</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-107"></a> <span class='hs-keyword'>where</span>
<a name="line-108"></a> <span class='hs-varid'>namePart</span> <span class='hs-keyglyph'>=</span>
<a name="line-109"></a> <span class='hs-varid'>oneof</span> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>return</span> <span class='hs-varid'>mazstr</span>
<a name="line-110"></a> <span class='hs-layout'>,</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>cs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>choose</span> <span class='hs-layout'>(</span><span class='hs-num'>1</span><span class='hs-layout'>,</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span>
<a name="line-111"></a> <span class='hs-varid'>vectorOf</span> <span class='hs-varid'>cs</span> <span class='hs-layout'>(</span><span class='hs-varid'>elements</span> <span class='hs-str'>"a_AQZ0'-∀"</span><span class='hs-layout'>)</span>
<a name="line-112"></a> <span class='hs-keyglyph'>]</span>
<a name="line-113"></a>
<a name="line-114"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-115"></a><span class='hs-comment'>-- All tests</span>
<a name="line-116"></a>
<a name="line-117"></a><span class='hs-comment'>-- | All the properties.</span>
<a name="line-118"></a>
<a name="line-119"></a><a name="tests"></a><span class='hs-definition'>tests</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IO</span> <span class='hs-conid'>Bool</span>
<a name="line-120"></a><span class='hs-definition'>tests</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runTests</span> <span class='hs-str'>"Agda.Compiler.MAlonzo.Encode"</span>
<a name="line-121"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>quickCheck'</span> <span class='hs-varid'>prop_encodeModuleName_injective</span>
<a name="line-122"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>quickCheck'</span> <span class='hs-varid'>prop_encodeModuleName_OK</span>
<a name="line-123"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>quickCheck'</span> <span class='hs-varid'>prop_encodeModuleName_preserved</span>
<a name="line-124"></a> <span class='hs-keyglyph'>]</span>
</pre></body>
</html>
