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<title>Data/Vector/Internal/Check.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 : Data.Vector.Internal.Check</span>
<a name="line-3"></a><span class='hs-comment'>-- Copyright : (c) Roman Leshchinskiy 2009</span>
<a name="line-4"></a><span class='hs-comment'>-- License : BSD-style</span>
<a name="line-5"></a><span class='hs-comment'>--</span>
<a name="line-6"></a><span class='hs-comment'>-- Maintainer : Roman Leshchinskiy <rl@cse.unsw.edu.au></span>
<a name="line-7"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-8"></a><span class='hs-comment'>-- Portability : non-portable</span>
<a name="line-9"></a><span class='hs-comment'>--</span>
<a name="line-10"></a><span class='hs-comment'>-- Bounds checking infrastructure</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a>
<a name="line-13"></a><span class='hs-comment'>{-# LANGUAGE MagicHash #-}</span>
<a name="line-14"></a>
<a name="line-15"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Vector</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span><span class='hs-varop'>.</span><span class='hs-conid'>Check</span> <span class='hs-layout'>(</span>
<a name="line-16"></a> <span class='hs-conid'>Checks</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>doChecks</span><span class='hs-layout'>,</span>
<a name="line-17"></a>
<a name="line-18"></a> <span class='hs-varid'>error</span><span class='hs-layout'>,</span> <span class='hs-varid'>internalError</span><span class='hs-layout'>,</span>
<a name="line-19"></a> <span class='hs-varid'>check</span><span class='hs-layout'>,</span> <span class='hs-varid'>checkIndex</span><span class='hs-layout'>,</span> <span class='hs-varid'>checkLength</span><span class='hs-layout'>,</span> <span class='hs-varid'>checkSlice</span>
<a name="line-20"></a><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-21"></a>
<a name="line-22"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span><span class='hs-layout'>(</span> <span class='hs-conid'>Int</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-23"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Prim</span><span class='hs-layout'>(</span> <span class='hs-conid'>Int</span><span class='hs-cpp'>#</span> <span class='hs-layout'>)</span>
<a name="line-24"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span><span class='hs-layout'>(</span> <span class='hs-varid'>error</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> <span class='hs-varid'>not</span> <span class='hs-layout'>)</span>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Prelude</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>P</span>
<a name="line-26"></a>
<a name="line-27"></a><span class='hs-comment'>-- NOTE: This is a workaround for GHC's weird behaviour where it doesn't inline</span>
<a name="line-28"></a><span class='hs-comment'>-- these functions into unfoldings which makes the intermediate code size</span>
<a name="line-29"></a><span class='hs-comment'>-- explode. See <a href="http://hackage.haskell.org/trac/ghc/ticket/5539.">http://hackage.haskell.org/trac/ghc/ticket/5539.</a></span>
<a name="line-30"></a><span class='hs-keyword'>infixr</span> <span class='hs-num'>2</span> <span class='hs-varop'>||</span>
<a name="line-31"></a><span class='hs-keyword'>infixr</span> <span class='hs-num'>3</span> <span class='hs-varop'>&&</span>
<a name="line-32"></a>
<a name="line-33"></a><a name="not"></a><span class='hs-definition'>not</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-34"></a><span class='hs-comment'>{-# INLINE not #-}</span>
<a name="line-35"></a><span class='hs-definition'>not</span> <span class='hs-conid'>True</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-36"></a><span class='hs-definition'>not</span> <span class='hs-conid'>False</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-37"></a>
<a name="line-38"></a><a name="&&"></a><span class='hs-layout'>(</span><span class='hs-varop'>&&</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-39"></a><span class='hs-comment'>{-# INLINE (&&) #-}</span>
<a name="line-40"></a><span class='hs-conid'>False</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-41"></a><span class='hs-conid'>True</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-42"></a>
<a name="line-43"></a><a name="%7c%7c"></a><span class='hs-layout'>(</span><span class='hs-varop'>||</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-44"></a><span class='hs-comment'>{-# INLINE (||) #-}</span>
<a name="line-45"></a><span class='hs-conid'>True</span> <span class='hs-varop'>||</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-46"></a><span class='hs-conid'>False</span> <span class='hs-varop'>||</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-47"></a>
<a name="line-48"></a>
<a name="line-49"></a><a name="Checks"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Checks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Bounds</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Unsafe</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Internal</span> <span class='hs-keyword'>deriving</span><span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>)</span>
<a name="line-50"></a>
<a name="line-51"></a><a name="doBoundsChecks"></a><span class='hs-definition'>doBoundsChecks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span>
<a name="line-52"></a><span class='hs-cpp'>#ifdef VECTOR_BOUNDS_CHECKS</span>
<a name="line-53"></a><span class='hs-definition'>doBoundsChecks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-54"></a><span class='hs-cpp'>#else</span>
<a name="line-55"></a><span class='hs-definition'>doBoundsChecks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-56"></a><span class='hs-cpp'>#endif</span>
<a name="line-57"></a>
<a name="line-58"></a><a name="doUnsafeChecks"></a><span class='hs-definition'>doUnsafeChecks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span>
<a name="line-59"></a><span class='hs-cpp'>#ifdef VECTOR_UNSAFE_CHECKS</span>
<a name="line-60"></a><span class='hs-definition'>doUnsafeChecks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-61"></a><span class='hs-cpp'>#else</span>
<a name="line-62"></a><span class='hs-definition'>doUnsafeChecks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-63"></a><span class='hs-cpp'>#endif</span>
<a name="line-64"></a>
<a name="line-65"></a><a name="doInternalChecks"></a><span class='hs-definition'>doInternalChecks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span>
<a name="line-66"></a><span class='hs-cpp'>#ifdef VECTOR_INTERNAL_CHECKS</span>
<a name="line-67"></a><span class='hs-definition'>doInternalChecks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-68"></a><span class='hs-cpp'>#else</span>
<a name="line-69"></a><span class='hs-definition'>doInternalChecks</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-70"></a><span class='hs-cpp'>#endif</span>
<a name="line-71"></a>
<a name="line-72"></a>
<a name="line-73"></a><a name="doChecks"></a><span class='hs-definition'>doChecks</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Checks</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-74"></a><span class='hs-comment'>{-# INLINE doChecks #-}</span>
<a name="line-75"></a><span class='hs-definition'>doChecks</span> <span class='hs-conid'>Bounds</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doBoundsChecks</span>
<a name="line-76"></a><span class='hs-definition'>doChecks</span> <span class='hs-conid'>Unsafe</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doUnsafeChecks</span>
<a name="line-77"></a><span class='hs-definition'>doChecks</span> <span class='hs-conid'>Internal</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doInternalChecks</span>
<a name="line-78"></a>
<a name="line-79"></a><a name="error_msg"></a><span class='hs-definition'>error_msg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-80"></a><span class='hs-definition'>error_msg</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>file</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'>line</span> <span class='hs-varop'>++</span> <span class='hs-str'>" ("</span> <span class='hs-varop'>++</span> <span class='hs-varid'>loc</span> <span class='hs-varop'>++</span> <span class='hs-str'>"): "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>msg</span>
<a name="line-81"></a>
<a name="line-82"></a><a name="error"></a><span class='hs-definition'>error</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-83"></a><span class='hs-comment'>{-# NOINLINE error #-}</span>
<a name="line-84"></a><span class='hs-definition'>error</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>msg</span>
<a name="line-85"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-varid'>error_msg</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>msg</span>
<a name="line-86"></a>
<a name="line-87"></a><a name="internalError"></a><span class='hs-definition'>internalError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-88"></a><span class='hs-comment'>{-# NOINLINE internalError #-}</span>
<a name="line-89"></a><span class='hs-definition'>internalError</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>msg</span>
<a name="line-90"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>P</span><span class='hs-varop'>.</span><span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-varid'>unlines</span>
<a name="line-91"></a> <span class='hs-keyglyph'>[</span><span class='hs-str'>"*** Internal error in package vector ***"</span>
<a name="line-92"></a> <span class='hs-layout'>,</span><span class='hs-str'>"*** Please submit a bug report at http://trac.haskell.org/vector"</span>
<a name="line-93"></a> <span class='hs-layout'>,</span><span class='hs-varid'>error_msg</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>msg</span><span class='hs-keyglyph'>]</span>
<a name="line-94"></a>
<a name="line-95"></a>
<a name="line-96"></a><a name="checkError"></a><span class='hs-definition'>checkError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Checks</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-97"></a><span class='hs-comment'>{-# NOINLINE checkError #-}</span>
<a name="line-98"></a><span class='hs-definition'>checkError</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>kind</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>msg</span>
<a name="line-99"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>kind</span> <span class='hs-keyword'>of</span>
<a name="line-100"></a> <span class='hs-conid'>Internal</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>internalError</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>msg</span>
<a name="line-101"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>error</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>msg</span>
<a name="line-102"></a>
<a name="line-103"></a><a name="check"></a><span class='hs-definition'>check</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Checks</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-104"></a><span class='hs-comment'>{-# INLINE check #-}</span>
<a name="line-105"></a><span class='hs-definition'>check</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>kind</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>msg</span> <span class='hs-varid'>cond</span> <span class='hs-varid'>x</span>
<a name="line-106"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>doChecks</span> <span class='hs-varid'>kind</span><span class='hs-layout'>)</span> <span class='hs-varop'>||</span> <span class='hs-varid'>cond</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-107"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkError</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>kind</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>msg</span>
<a name="line-108"></a>
<a name="line-109"></a><a name="checkIndex_msg"></a><span class='hs-definition'>checkIndex_msg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-110"></a><span class='hs-comment'>{-# INLINE checkIndex_msg #-}</span>
<a name="line-111"></a><span class='hs-definition'>checkIndex_msg</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkIndex_msg</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span>
<a name="line-112"></a>
<a name="line-113"></a><span class='hs-definition'>checkIndex_msg</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-114"></a><span class='hs-comment'>{-# NOINLINE checkIndex_msg# #-}</span>
<a name="line-115"></a><span class='hs-definition'>checkIndex_msg</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"index out of bounds "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-cpp'>#</span><span class='hs-layout'>,</span> <span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span>
<a name="line-116"></a>
<a name="line-117"></a><a name="checkIndex"></a><span class='hs-definition'>checkIndex</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Checks</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-118"></a><span class='hs-comment'>{-# INLINE checkIndex #-}</span>
<a name="line-119"></a><span class='hs-definition'>checkIndex</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>kind</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>i</span> <span class='hs-varid'>n</span> <span class='hs-varid'>x</span>
<a name="line-120"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>check</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>kind</span> <span class='hs-varid'>loc</span> <span class='hs-layout'>(</span><span class='hs-varid'>checkIndex_msg</span> <span class='hs-varid'>i</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>i</span><span class='hs-varop'><</span><span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-121"></a>
<a name="line-122"></a>
<a name="line-123"></a><a name="checkLength_msg"></a><span class='hs-definition'>checkLength_msg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-124"></a><span class='hs-comment'>{-# INLINE checkLength_msg #-}</span>
<a name="line-125"></a><span class='hs-definition'>checkLength_msg</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkLength_msg</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span>
<a name="line-126"></a>
<a name="line-127"></a><span class='hs-definition'>checkLength_msg</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-128"></a><span class='hs-comment'>{-# NOINLINE checkLength_msg# #-}</span>
<a name="line-129"></a><span class='hs-definition'>checkLength_msg</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"negative length "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span>
<a name="line-130"></a>
<a name="line-131"></a><a name="checkLength"></a><span class='hs-definition'>checkLength</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Checks</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-132"></a><span class='hs-comment'>{-# INLINE checkLength #-}</span>
<a name="line-133"></a><span class='hs-definition'>checkLength</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>kind</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>n</span> <span class='hs-varid'>x</span>
<a name="line-134"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>check</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>kind</span> <span class='hs-varid'>loc</span> <span class='hs-layout'>(</span><span class='hs-varid'>checkLength_msg</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-135"></a>
<a name="line-136"></a>
<a name="line-137"></a><a name="checkSlice_msg"></a><span class='hs-definition'>checkSlice_msg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-138"></a><span class='hs-comment'>{-# INLINE checkSlice_msg #-}</span>
<a name="line-139"></a><span class='hs-definition'>checkSlice_msg</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>m</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>checkSlice_msg</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-cpp'>#</span> <span class='hs-varid'>m</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span>
<a name="line-140"></a>
<a name="line-141"></a><span class='hs-definition'>checkSlice_msg</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-142"></a><span class='hs-comment'>{-# NOINLINE checkSlice_msg# #-}</span>
<a name="line-143"></a><span class='hs-definition'>checkSlice_msg</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-cpp'>#</span> <span class='hs-varid'>m</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"invalid slice "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>i</span><span class='hs-cpp'>#</span><span class='hs-layout'>,</span> <span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>m</span><span class='hs-cpp'>#</span><span class='hs-layout'>,</span> <span class='hs-conid'>I</span><span class='hs-cpp'>#</span> <span class='hs-varid'>n</span><span class='hs-cpp'>#</span><span class='hs-layout'>)</span>
<a name="line-144"></a>
<a name="line-145"></a><a name="checkSlice"></a><span class='hs-definition'>checkSlice</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Checks</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-146"></a><span class='hs-comment'>{-# INLINE checkSlice #-}</span>
<a name="line-147"></a><span class='hs-definition'>checkSlice</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>kind</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>i</span> <span class='hs-varid'>m</span> <span class='hs-varid'>n</span> <span class='hs-varid'>x</span>
<a name="line-148"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>check</span> <span class='hs-varid'>file</span> <span class='hs-varid'>line</span> <span class='hs-varid'>kind</span> <span class='hs-varid'>loc</span> <span class='hs-layout'>(</span><span class='hs-varid'>checkSlice_msg</span> <span class='hs-varid'>i</span> <span class='hs-varid'>m</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span>
<a name="line-149"></a> <span class='hs-layout'>(</span><span class='hs-varid'>i</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>m</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>i</span><span class='hs-varop'>+</span><span class='hs-varid'>m</span> <span class='hs-varop'><=</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-150"></a>
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