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<pre><a name="line-1"></a><span class='hs-comment'>{-# OPTIONS_GHC -XNoImplicitPrelude -funbox-strict-fields #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# OPTIONS_HADDOCK hide #-}</span>
<a name="line-3"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-4"></a><span class='hs-comment'>-- |</span>
<a name="line-5"></a><span class='hs-comment'>-- Module : GHC.IO.Exception</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) The University of Glasgow, 2009</span>
<a name="line-7"></a><span class='hs-comment'>-- License : see libraries/base/LICENSE</span>
<a name="line-8"></a><span class='hs-comment'>-- </span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : libraries@haskell.org</span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : internal</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability : non-portable</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- IO-related Exception types and functions</span>
<a name="line-14"></a><span class='hs-comment'>--</span>
<a name="line-15"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-16"></a>
<a name="line-17"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span> <span class='hs-layout'>(</span>
<a name="line-18"></a> <span class='hs-conid'>BlockedIndefinitelyOnMVar</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'>blockedIndefinitelyOnMVar</span><span class='hs-layout'>,</span>
<a name="line-19"></a> <span class='hs-conid'>BlockedIndefinitelyOnSTM</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'>blockedIndefinitelyOnSTM</span><span class='hs-layout'>,</span>
<a name="line-20"></a> <span class='hs-conid'>Deadlock</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-conid'>AssertionFailed</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-22"></a> <span class='hs-conid'>AsyncException</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'>stackOverflow</span><span class='hs-layout'>,</span> <span class='hs-varid'>heapOverflow</span><span class='hs-layout'>,</span>
<a name="line-23"></a> <span class='hs-conid'>ArrayException</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-24"></a> <span class='hs-conid'>ExitCode</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-25"></a>
<a name="line-26"></a> <span class='hs-varid'>ioException</span><span class='hs-layout'>,</span>
<a name="line-27"></a> <span class='hs-varid'>ioError</span><span class='hs-layout'>,</span>
<a name="line-28"></a> <span class='hs-conid'>IOError</span><span class='hs-layout'>,</span>
<a name="line-29"></a> <span class='hs-conid'>IOException</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-30"></a> <span class='hs-conid'>IOErrorType</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-31"></a> <span class='hs-varid'>userError</span><span class='hs-layout'>,</span>
<a name="line-32"></a> <span class='hs-varid'>assertError</span><span class='hs-layout'>,</span>
<a name="line-33"></a> <span class='hs-varid'>unsupportedOperation</span><span class='hs-layout'>,</span>
<a name="line-34"></a> <span class='hs-varid'>untangle</span><span class='hs-layout'>,</span>
<a name="line-35"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-36"></a>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span>
<a name="line-38"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span>
<a name="line-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span>
<a name="line-40"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Show</span>
<a name="line-41"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Read</span>
<a name="line-42"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span>
<a name="line-43"></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-44"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>GHC</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Handle</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-45"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Foreign</span><span class='hs-varop'>.</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>Types</span>
<a name="line-46"></a>
<a name="line-47"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Typeable</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Typeable</span> <span class='hs-layout'>)</span>
<a name="line-48"></a>
<a name="line-49"></a><span class='hs-comment'>-- ------------------------------------------------------------------------</span>
<a name="line-50"></a><span class='hs-comment'>-- Exception datatypes and operations</span>
<a name="line-51"></a>
<a name="line-52"></a><a name="BlockedIndefinitelyOnMVar"></a><span class='hs-comment'>-- |The thread is blocked on an @MVar@, but there are no other references</span>
<a name="line-53"></a><a name="BlockedIndefinitelyOnMVar"></a><span class='hs-comment'>-- to the @MVar@ so it can't ever continue.</span>
<a name="line-54"></a><a name="BlockedIndefinitelyOnMVar"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>BlockedIndefinitelyOnMVar</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BlockedIndefinitelyOnMVar</span>
<a name="line-55"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Typeable</span>
<a name="line-56"></a>
<a name="line-57"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Exception</span> <span class='hs-conid'>BlockedIndefinitelyOnMVar</span>
<a name="line-58"></a>
<a name="line-59"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>BlockedIndefinitelyOnMVar</span> <span class='hs-keyword'>where</span>
<a name="line-60"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>BlockedIndefinitelyOnMVar</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"thread blocked indefinitely in an MVar operation"</span>
<a name="line-61"></a>
<a name="line-62"></a><a name="blockedIndefinitelyOnMVar"></a><span class='hs-definition'>blockedIndefinitelyOnMVar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SomeException</span> <span class='hs-comment'>-- for the RTS</span>
<a name="line-63"></a><span class='hs-definition'>blockedIndefinitelyOnMVar</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toException</span> <span class='hs-conid'>BlockedIndefinitelyOnMVar</span>
<a name="line-64"></a>
<a name="line-65"></a><span class='hs-comment'>-----</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="BlockedIndefinitelyOnSTM"></a><span class='hs-comment'>-- |The thread is waiting to retry an STM transaction, but there are no</span>
<a name="line-68"></a><a name="BlockedIndefinitelyOnSTM"></a><span class='hs-comment'>-- other references to any @TVar@s involved, so it can't ever continue.</span>
<a name="line-69"></a><a name="BlockedIndefinitelyOnSTM"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>BlockedIndefinitelyOnSTM</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>BlockedIndefinitelyOnSTM</span>
<a name="line-70"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Typeable</span>
<a name="line-71"></a>
<a name="line-72"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Exception</span> <span class='hs-conid'>BlockedIndefinitelyOnSTM</span>
<a name="line-73"></a>
<a name="line-74"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>BlockedIndefinitelyOnSTM</span> <span class='hs-keyword'>where</span>
<a name="line-75"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>BlockedIndefinitelyOnSTM</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"thread blocked indefinitely in an STM transaction"</span>
<a name="line-76"></a>
<a name="line-77"></a><a name="blockedIndefinitelyOnSTM"></a><span class='hs-definition'>blockedIndefinitelyOnSTM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SomeException</span> <span class='hs-comment'>-- for the RTS</span>
<a name="line-78"></a><span class='hs-definition'>blockedIndefinitelyOnSTM</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toException</span> <span class='hs-conid'>BlockedIndefinitelyOnSTM</span>
<a name="line-79"></a>
<a name="line-80"></a><span class='hs-comment'>-----</span>
<a name="line-81"></a>
<a name="line-82"></a><a name="Deadlock"></a><span class='hs-comment'>-- |There are no runnable threads, so the program is deadlocked.</span>
<a name="line-83"></a><a name="Deadlock"></a><span class='hs-comment'>-- The @Deadlock@ exception is raised in the main thread only.</span>
<a name="line-84"></a><a name="Deadlock"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Deadlock</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Deadlock</span>
<a name="line-85"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Typeable</span>
<a name="line-86"></a>
<a name="line-87"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Exception</span> <span class='hs-conid'>Deadlock</span>
<a name="line-88"></a>
<a name="line-89"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>Deadlock</span> <span class='hs-keyword'>where</span>
<a name="line-90"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Deadlock</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"<<deadlock>>"</span>
<a name="line-91"></a>
<a name="line-92"></a><span class='hs-comment'>-----</span>
<a name="line-93"></a>
<a name="line-94"></a><a name="AssertionFailed"></a><span class='hs-comment'>-- |'assert' was applied to 'False'.</span>
<a name="line-95"></a><a name="AssertionFailed"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>AssertionFailed</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AssertionFailed</span> <span class='hs-conid'>String</span>
<a name="line-96"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Typeable</span>
<a name="line-97"></a>
<a name="line-98"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Exception</span> <span class='hs-conid'>AssertionFailed</span>
<a name="line-99"></a>
<a name="line-100"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>AssertionFailed</span> <span class='hs-keyword'>where</span>
<a name="line-101"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>AssertionFailed</span> <span class='hs-varid'>err</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-varid'>err</span>
<a name="line-102"></a>
<a name="line-103"></a><span class='hs-comment'>-----</span>
<a name="line-104"></a>
<a name="line-105"></a><a name="AsyncException"></a><span class='hs-comment'>-- |Asynchronous exceptions.</span>
<a name="line-106"></a><a name="AsyncException"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>AsyncException</span>
<a name="line-107"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>StackOverflow</span>
<a name="line-108"></a> <span class='hs-comment'>-- ^The current thread\'s stack exceeded its limit.</span>
<a name="line-109"></a> <span class='hs-comment'>-- Since an exception has been raised, the thread\'s stack</span>
<a name="line-110"></a> <span class='hs-comment'>-- will certainly be below its limit again, but the</span>
<a name="line-111"></a> <span class='hs-comment'>-- programmer should take remedial action</span>
<a name="line-112"></a> <span class='hs-comment'>-- immediately.</span>
<a name="line-113"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HeapOverflow</span>
<a name="line-114"></a> <span class='hs-comment'>-- ^The program\'s heap is reaching its limit, and</span>
<a name="line-115"></a> <span class='hs-comment'>-- the program should take action to reduce the amount of</span>
<a name="line-116"></a> <span class='hs-comment'>-- live data it has. Notes:</span>
<a name="line-117"></a> <span class='hs-comment'>--</span>
<a name="line-118"></a> <span class='hs-comment'>-- * It is undefined which thread receives this exception.</span>
<a name="line-119"></a> <span class='hs-comment'>--</span>
<a name="line-120"></a> <span class='hs-comment'>-- * GHC currently does not throw 'HeapOverflow' exceptions.</span>
<a name="line-121"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ThreadKilled</span>
<a name="line-122"></a> <span class='hs-comment'>-- ^This exception is raised by another thread</span>
<a name="line-123"></a> <span class='hs-comment'>-- calling 'Control.Concurrent.killThread', or by the system</span>
<a name="line-124"></a> <span class='hs-comment'>-- if it needs to terminate the thread for some</span>
<a name="line-125"></a> <span class='hs-comment'>-- reason.</span>
<a name="line-126"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>UserInterrupt</span>
<a name="line-127"></a> <span class='hs-comment'>-- ^This exception is raised by default in the main thread of</span>
<a name="line-128"></a> <span class='hs-comment'>-- the program when the user requests to terminate the program</span>
<a name="line-129"></a> <span class='hs-comment'>-- via the usual mechanism(s) (e.g. Control-C in the console).</span>
<a name="line-130"></a> <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'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span><span class='hs-layout'>)</span>
<a name="line-131"></a>
<a name="line-132"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Exception</span> <span class='hs-conid'>AsyncException</span>
<a name="line-133"></a>
<a name="line-134"></a><a name="ArrayException"></a><span class='hs-comment'>-- | Exceptions generated by array operations</span>
<a name="line-135"></a><a name="ArrayException"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ArrayException</span>
<a name="line-136"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IndexOutOfBounds</span> <span class='hs-conid'>String</span>
<a name="line-137"></a> <span class='hs-comment'>-- ^An attempt was made to index an array outside</span>
<a name="line-138"></a> <span class='hs-comment'>-- its declared bounds.</span>
<a name="line-139"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>UndefinedElement</span> <span class='hs-conid'>String</span>
<a name="line-140"></a> <span class='hs-comment'>-- ^An attempt was made to evaluate an element of an</span>
<a name="line-141"></a> <span class='hs-comment'>-- array that had not been initialized.</span>
<a name="line-142"></a> <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'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span><span class='hs-layout'>)</span>
<a name="line-143"></a>
<a name="line-144"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Exception</span> <span class='hs-conid'>ArrayException</span>
<a name="line-145"></a>
<a name="line-146"></a><a name="stackOverflow"></a><span class='hs-definition'>stackOverflow</span><span class='hs-layout'>,</span> <span class='hs-varid'>heapOverflow</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SomeException</span> <span class='hs-comment'>-- for the RTS</span>
<a name="line-147"></a><span class='hs-definition'>stackOverflow</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toException</span> <span class='hs-conid'>StackOverflow</span>
<a name="line-148"></a><a name="heapOverflow"></a><span class='hs-definition'>heapOverflow</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>toException</span> <span class='hs-conid'>HeapOverflow</span>
<a name="line-149"></a>
<a name="line-150"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>AsyncException</span> <span class='hs-keyword'>where</span>
<a name="line-151"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>StackOverflow</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"stack overflow"</span>
<a name="line-152"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>HeapOverflow</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"heap overflow"</span>
<a name="line-153"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>ThreadKilled</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"thread killed"</span>
<a name="line-154"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>UserInterrupt</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"user interrupt"</span>
<a name="line-155"></a>
<a name="line-156"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>ArrayException</span> <span class='hs-keyword'>where</span>
<a name="line-157"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>IndexOutOfBounds</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-158"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"array index out of range"</span>
<a name="line-159"></a> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>null</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>showString</span> <span class='hs-str'>": "</span> <span class='hs-varop'>.</span> <span class='hs-varid'>showString</span> <span class='hs-varid'>s</span>
<a name="line-160"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span>
<a name="line-161"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>UndefinedElement</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-162"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showString</span> <span class='hs-str'>"undefined array element"</span>
<a name="line-163"></a> <span class='hs-varop'>.</span> <span class='hs-layout'>(</span><span class='hs-keyword'>if</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>null</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>showString</span> <span class='hs-str'>": "</span> <span class='hs-varop'>.</span> <span class='hs-varid'>showString</span> <span class='hs-varid'>s</span>
<a name="line-164"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>id</span><span class='hs-layout'>)</span>
<a name="line-165"></a>
<a name="line-166"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-167"></a><span class='hs-comment'>-- The ExitCode type</span>
<a name="line-168"></a>
<a name="line-169"></a><span class='hs-comment'>-- We need it here because it is used in ExitException in the</span>
<a name="line-170"></a><span class='hs-comment'>-- Exception datatype (above).</span>
<a name="line-171"></a>
<a name="line-172"></a><a name="ExitCode"></a><span class='hs-comment'>-- | Defines the exit codes that a program can return.</span>
<a name="line-173"></a><a name="ExitCode"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ExitCode</span>
<a name="line-174"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ExitSuccess</span> <span class='hs-comment'>-- ^ indicates successful termination;</span>
<a name="line-175"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ExitFailure</span> <span class='hs-conid'>Int</span>
<a name="line-176"></a> <span class='hs-comment'>-- ^ indicates program failure with an exit code.</span>
<a name="line-177"></a> <span class='hs-comment'>-- The exact interpretation of the code is</span>
<a name="line-178"></a> <span class='hs-comment'>-- operating-system dependent. In particular, some values</span>
<a name="line-179"></a> <span class='hs-comment'>-- may be prohibited (e.g. 0 on a POSIX-compliant system).</span>
<a name="line-180"></a> <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'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Typeable</span><span class='hs-layout'>)</span>
<a name="line-181"></a>
<a name="line-182"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Exception</span> <span class='hs-conid'>ExitCode</span>
<a name="line-183"></a>
<a name="line-184"></a><a name="ioException"></a><span class='hs-definition'>ioException</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IOException</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-185"></a><span class='hs-definition'>ioException</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>throwIO</span> <span class='hs-varid'>err</span>
<a name="line-186"></a>
<a name="line-187"></a><a name="ioError"></a><span class='hs-comment'>-- | Raise an 'IOError' in the 'IO' monad.</span>
<a name="line-188"></a><span class='hs-definition'>ioError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IOError</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-varid'>a</span>
<a name="line-189"></a><span class='hs-definition'>ioError</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ioException</span>
<a name="line-190"></a>
<a name="line-191"></a><span class='hs-comment'>-- ---------------------------------------------------------------------------</span>
<a name="line-192"></a><span class='hs-comment'>-- IOError type</span>
<a name="line-193"></a>
<a name="line-194"></a><a name="IOError"></a><span class='hs-comment'>-- | The Haskell 98 type for exceptions in the 'IO' monad.</span>
<a name="line-195"></a><a name="IOError"></a><span class='hs-comment'>-- Any I\/O operation may raise an 'IOError' instead of returning a result.</span>
<a name="line-196"></a><a name="IOError"></a><span class='hs-comment'>-- For a more general type of exception, including also those that arise</span>
<a name="line-197"></a><a name="IOError"></a><span class='hs-comment'>-- in pure code, see "Control.Exception.Exception".</span>
<a name="line-198"></a><a name="IOError"></a><span class='hs-comment'>--</span>
<a name="line-199"></a><a name="IOError"></a><span class='hs-comment'>-- In Haskell 98, this is an opaque type.</span>
<a name="line-200"></a><a name="IOError"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>IOError</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IOException</span>
<a name="line-201"></a>
<a name="line-202"></a><a name="IOException"></a><span class='hs-comment'>-- |Exceptions that occur in the @IO@ monad.</span>
<a name="line-203"></a><a name="IOException"></a><span class='hs-comment'>-- An @IOException@ records a more specific error type, a descriptive</span>
<a name="line-204"></a><a name="IOException"></a><span class='hs-comment'>-- string and maybe the handle that was used when the error was</span>
<a name="line-205"></a><a name="IOException"></a><span class='hs-comment'>-- flagged.</span>
<a name="line-206"></a><a name="IOException"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>IOException</span>
<a name="line-207"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IOError</span> <span class='hs-layout'>{</span>
<a name="line-208"></a> <span class='hs-varid'>ioe_handle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Handle</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- the handle used by the action flagging </span>
<a name="line-209"></a> <span class='hs-comment'>-- the error.</span>
<a name="line-210"></a> <span class='hs-varid'>ioe_type</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IOErrorType</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- what it was.</span>
<a name="line-211"></a> <span class='hs-varid'>ioe_location</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- location.</span>
<a name="line-212"></a> <span class='hs-varid'>ioe_description</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- error type specific information.</span>
<a name="line-213"></a> <span class='hs-varid'>ioe_errno</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>CInt</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- errno leading to this error, if any.</span>
<a name="line-214"></a> <span class='hs-varid'>ioe_filename</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>FilePath</span> <span class='hs-comment'>-- filename the error is related to.</span>
<a name="line-215"></a> <span class='hs-layout'>}</span>
<a name="line-216"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Typeable</span>
<a name="line-217"></a>
<a name="line-218"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Exception</span> <span class='hs-conid'>IOException</span>
<a name="line-219"></a>
<a name="line-220"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-conid'>IOException</span> <span class='hs-keyword'>where</span>
<a name="line-221"></a> <span class='hs-layout'>(</span><span class='hs-conid'>IOError</span> <span class='hs-varid'>h1</span> <span class='hs-varid'>e1</span> <span class='hs-varid'>loc1</span> <span class='hs-varid'>str1</span> <span class='hs-varid'>en1</span> <span class='hs-varid'>fn1</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-layout'>(</span><span class='hs-conid'>IOError</span> <span class='hs-varid'>h2</span> <span class='hs-varid'>e2</span> <span class='hs-varid'>loc2</span> <span class='hs-varid'>str2</span> <span class='hs-varid'>en2</span> <span class='hs-varid'>fn2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-222"></a> <span class='hs-varid'>e1</span><span class='hs-varop'>==</span><span class='hs-varid'>e2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>str1</span><span class='hs-varop'>==</span><span class='hs-varid'>str2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>h1</span><span class='hs-varop'>==</span><span class='hs-varid'>h2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>loc1</span><span class='hs-varop'>==</span><span class='hs-varid'>loc2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>en1</span><span class='hs-varop'>==</span><span class='hs-varid'>en2</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>fn1</span><span class='hs-varop'>==</span><span class='hs-varid'>fn2</span>
<a name="line-223"></a>
<a name="line-224"></a><a name="IOErrorType"></a><span class='hs-comment'>-- | An abstract type that contains a value for each variant of 'IOError'.</span>
<a name="line-225"></a><a name="IOErrorType"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>IOErrorType</span>
<a name="line-226"></a> <span class='hs-comment'>-- Haskell 98:</span>
<a name="line-227"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>AlreadyExists</span>
<a name="line-228"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NoSuchThing</span>
<a name="line-229"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ResourceBusy</span>
<a name="line-230"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ResourceExhausted</span>
<a name="line-231"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>EOF</span>
<a name="line-232"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>IllegalOperation</span>
<a name="line-233"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PermissionDenied</span>
<a name="line-234"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>UserError</span>
<a name="line-235"></a> <span class='hs-comment'>-- GHC only:</span>
<a name="line-236"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>UnsatisfiedConstraints</span>
<a name="line-237"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SystemError</span>
<a name="line-238"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ProtocolError</span>
<a name="line-239"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OtherError</span>
<a name="line-240"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>InvalidArgument</span>
<a name="line-241"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>InappropriateType</span>
<a name="line-242"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HardwareFault</span>
<a name="line-243"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>UnsupportedOperation</span>
<a name="line-244"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>TimeExpired</span>
<a name="line-245"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ResourceVanished</span>
<a name="line-246"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Interrupted</span>
<a name="line-247"></a>
<a name="line-248"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-conid'>IOErrorType</span> <span class='hs-keyword'>where</span>
<a name="line-249"></a> <span class='hs-varid'>x</span> <span class='hs-varop'>==</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getTag</span> <span class='hs-varid'>x</span> <span class='hs-varop'>==#</span> <span class='hs-varid'>getTag</span> <span class='hs-varid'>y</span>
<a name="line-250"></a>
<a name="line-251"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>IOErrorType</span> <span class='hs-keyword'>where</span>
<a name="line-252"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span>
<a name="line-253"></a> <span class='hs-varid'>showString</span> <span class='hs-varop'>$</span>
<a name="line-254"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>of</span>
<a name="line-255"></a> <span class='hs-conid'>AlreadyExists</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"already exists"</span>
<a name="line-256"></a> <span class='hs-conid'>NoSuchThing</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"does not exist"</span>
<a name="line-257"></a> <span class='hs-conid'>ResourceBusy</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"resource busy"</span>
<a name="line-258"></a> <span class='hs-conid'>ResourceExhausted</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"resource exhausted"</span>
<a name="line-259"></a> <span class='hs-conid'>EOF</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"end of file"</span>
<a name="line-260"></a> <span class='hs-conid'>IllegalOperation</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"illegal operation"</span>
<a name="line-261"></a> <span class='hs-conid'>PermissionDenied</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"permission denied"</span>
<a name="line-262"></a> <span class='hs-conid'>UserError</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"user error"</span>
<a name="line-263"></a> <span class='hs-conid'>HardwareFault</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"hardware fault"</span>
<a name="line-264"></a> <span class='hs-conid'>InappropriateType</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"inappropriate type"</span>
<a name="line-265"></a> <span class='hs-conid'>Interrupted</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"interrupted"</span>
<a name="line-266"></a> <span class='hs-conid'>InvalidArgument</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"invalid argument"</span>
<a name="line-267"></a> <span class='hs-conid'>OtherError</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"failed"</span>
<a name="line-268"></a> <span class='hs-conid'>ProtocolError</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"protocol error"</span>
<a name="line-269"></a> <span class='hs-conid'>ResourceVanished</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"resource vanished"</span>
<a name="line-270"></a> <span class='hs-conid'>SystemError</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"system error"</span>
<a name="line-271"></a> <span class='hs-conid'>TimeExpired</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"timeout"</span>
<a name="line-272"></a> <span class='hs-conid'>UnsatisfiedConstraints</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"unsatisified constraints"</span> <span class='hs-comment'>-- ultra-precise!</span>
<a name="line-273"></a> <span class='hs-conid'>UnsupportedOperation</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>"unsupported operation"</span>
<a name="line-274"></a>
<a name="line-275"></a><a name="userError"></a><span class='hs-comment'>-- | Construct an 'IOError' value with a string describing the error.</span>
<a name="line-276"></a><span class='hs-comment'>-- The 'fail' method of the 'IO' instance of the 'Monad' class raises a</span>
<a name="line-277"></a><span class='hs-comment'>-- 'userError', thus:</span>
<a name="line-278"></a><span class='hs-comment'>--</span>
<a name="line-279"></a><span class='hs-comment'>-- > instance Monad IO where </span>
<a name="line-280"></a><span class='hs-comment'>-- > ...</span>
<a name="line-281"></a><span class='hs-comment'>-- > fail s = ioError (userError s)</span>
<a name="line-282"></a><span class='hs-comment'>--</span>
<a name="line-283"></a><span class='hs-definition'>userError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IOError</span>
<a name="line-284"></a><span class='hs-definition'>userError</span> <span class='hs-varid'>str</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IOError</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>UserError</span> <span class='hs-str'>""</span> <span class='hs-varid'>str</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span>
<a name="line-285"></a>
<a name="line-286"></a><span class='hs-comment'>-- ---------------------------------------------------------------------------</span>
<a name="line-287"></a><span class='hs-comment'>-- Showing IOErrors</span>
<a name="line-288"></a>
<a name="line-289"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>IOException</span> <span class='hs-keyword'>where</span>
<a name="line-290"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-conid'>IOError</span> <span class='hs-varid'>hdl</span> <span class='hs-varid'>iot</span> <span class='hs-varid'>loc</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>fn</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-291"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>case</span> <span class='hs-varid'>fn</span> <span class='hs-keyword'>of</span>
<a name="line-292"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>hdl</span> <span class='hs-keyword'>of</span>
<a name="line-293"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>id</span>
<a name="line-294"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>p</span> <span class='hs-varid'>h</span> <span class='hs-varop'>.</span> <span class='hs-varid'>showString</span> <span class='hs-str'>": "</span>
<a name="line-295"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>showString</span> <span class='hs-varid'>name</span> <span class='hs-varop'>.</span> <span class='hs-varid'>showString</span> <span class='hs-str'>": "</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span>
<a name="line-296"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>case</span> <span class='hs-varid'>loc</span> <span class='hs-keyword'>of</span>
<a name="line-297"></a> <span class='hs-str'>""</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>id</span>
<a name="line-298"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>showString</span> <span class='hs-varid'>loc</span> <span class='hs-varop'>.</span> <span class='hs-varid'>showString</span> <span class='hs-str'>": "</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span>
<a name="line-299"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>p</span> <span class='hs-varid'>iot</span> <span class='hs-varop'>.</span>
<a name="line-300"></a> <span class='hs-layout'>(</span><span class='hs-keyword'>case</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-301"></a> <span class='hs-str'>""</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>id</span>
<a name="line-302"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>showString</span> <span class='hs-str'>" ("</span> <span class='hs-varop'>.</span> <span class='hs-varid'>showString</span> <span class='hs-varid'>s</span> <span class='hs-varop'>.</span> <span class='hs-varid'>showString</span> <span class='hs-str'>")"</span><span class='hs-layout'>)</span>
<a name="line-303"></a>
<a name="line-304"></a><a name="assertError"></a><span class='hs-definition'>assertError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Addr</span><span class='hs-cpp'>#</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-305"></a><span class='hs-definition'>assertError</span> <span class='hs-varid'>str</span> <span class='hs-varid'>predicate</span> <span class='hs-varid'>v</span>
<a name="line-306"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>predicate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>v</span>
<a name="line-307"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>throw</span> <span class='hs-layout'>(</span><span class='hs-conid'>AssertionFailed</span> <span class='hs-layout'>(</span><span class='hs-varid'>untangle</span> <span class='hs-varid'>str</span> <span class='hs-str'>"Assertion failed"</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-308"></a>
<a name="line-309"></a><a name="unsupportedOperation"></a><span class='hs-definition'>unsupportedOperation</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IOError</span>
<a name="line-310"></a><span class='hs-definition'>unsupportedOperation</span> <span class='hs-keyglyph'>=</span>
<a name="line-311"></a> <span class='hs-layout'>(</span><span class='hs-conid'>IOError</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>UnsupportedOperation</span> <span class='hs-str'>""</span>
<a name="line-312"></a> <span class='hs-str'>"Operation is not supported"</span> <span class='hs-conid'>Nothing</span> <span class='hs-conid'>Nothing</span><span class='hs-layout'>)</span>
<a name="line-313"></a>
<a name="line-314"></a><a name="untangle"></a><span class='hs-comment'>{-
<a name="line-315"></a>(untangle coded message) expects "coded" to be of the form
<a name="line-316"></a> "location|details"
<a name="line-317"></a>It prints
<a name="line-318"></a> location message details
<a name="line-319"></a>-}</span>
<a name="line-320"></a><span class='hs-definition'>untangle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Addr</span><span class='hs-cpp'>#</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-321"></a><span class='hs-definition'>untangle</span> <span class='hs-varid'>coded</span> <span class='hs-varid'>message</span>
<a name="line-322"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>location</span>
<a name="line-323"></a> <span class='hs-varop'>++</span> <span class='hs-str'>": "</span>
<a name="line-324"></a> <span class='hs-varop'>++</span> <span class='hs-varid'>message</span>
<a name="line-325"></a> <span class='hs-varop'>++</span> <span class='hs-varid'>details</span>
<a name="line-326"></a> <span class='hs-varop'>++</span> <span class='hs-str'>"\n"</span>
<a name="line-327"></a> <span class='hs-keyword'>where</span>
<a name="line-328"></a> <span class='hs-varid'>coded_str</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unpackCStringUtf8</span><span class='hs-cpp'>#</span> <span class='hs-varid'>coded</span>
<a name="line-329"></a>
<a name="line-330"></a> <span class='hs-layout'>(</span><span class='hs-varid'>location</span><span class='hs-layout'>,</span> <span class='hs-varid'>details</span><span class='hs-layout'>)</span>
<a name="line-331"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>span</span> <span class='hs-varid'>not_bar</span> <span class='hs-varid'>coded_str</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span> <span class='hs-layout'>{</span> <span class='hs-layout'>(</span><span class='hs-varid'>loc</span><span class='hs-layout'>,</span> <span class='hs-varid'>rest</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-332"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>rest</span> <span class='hs-keyword'>of</span>
<a name="line-333"></a> <span class='hs-layout'>(</span><span class='hs-chr'>'|'</span><span class='hs-conop'>:</span><span class='hs-varid'>det</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>loc</span><span class='hs-layout'>,</span> <span class='hs-chr'>' '</span> <span class='hs-conop'>:</span> <span class='hs-varid'>det</span><span class='hs-layout'>)</span>
<a name="line-334"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>loc</span><span class='hs-layout'>,</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span>
<a name="line-335"></a> <span class='hs-layout'>}</span>
<a name="line-336"></a> <span class='hs-varid'>not_bar</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-chr'>'|'</span>
</pre></body>
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