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<pre><a name="line-1"></a><span class='hs-comment'>{- |
<a name="line-2"></a>Files with text content.
<a name="line-3"></a>-}</span>
<a name="line-4"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</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-varop'>.</span><span class='hs-conid'>TextFile</span> <span class='hs-keyword'>where</span>
<a name="line-5"></a>
<a name="line-6"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</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-varop'>.</span><span class='hs-conid'>File</span> <span class='hs-layout'>(</span><span class='hs-conid'>EIO</span><span class='hs-layout'>,</span> <span class='hs-varid'>close</span><span class='hs-layout'>,</span> <span class='hs-layout'>)</span>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span><span class='hs-varop'>.</span><span class='hs-conid'>Synchronous</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Sync</span>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span><span class='hs-varop'>.</span><span class='hs-conid'>Asynchronous</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Async</span>
<a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span><span class='hs-varop'>.</span><span class='hs-conid'>Synchronous</span> <span class='hs-layout'>(</span><span class='hs-varid'>bracketT</span><span class='hs-layout'>,</span> <span class='hs-layout'>)</span>
<a name="line-10"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Straight</span> <span class='hs-layout'>(</span><span class='hs-conid'>SIO</span><span class='hs-layout'>,</span> <span class='hs-varid'>ioToExceptionalSIO</span><span class='hs-layout'>,</span> <span class='hs-varid'>unsafeInterleaveSIO</span><span class='hs-layout'>,</span> <span class='hs-layout'>)</span>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Handle</span><span class='hs-layout'>,</span> <span class='hs-conid'>IOMode</span><span class='hs-layout'>,</span> <span class='hs-layout'>)</span>
<a name="line-12"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>IO</span>
<a name="line-13"></a>
<a name="line-14"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span> <span class='hs-layout'>(</span><span class='hs-varid'>isEOFError</span><span class='hs-layout'>,</span> <span class='hs-layout'>)</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span> <span class='hs-layout'>(</span><span class='hs-conid'>IOException</span><span class='hs-layout'>)</span>
<a name="line-16"></a>
<a name="line-17"></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'>getChar</span><span class='hs-layout'>)</span>
<a name="line-18"></a>
<a name="line-19"></a>
<a name="line-20"></a><a name="open"></a><span class='hs-definition'>open</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IOMode</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EIO</span> <span class='hs-conid'>Handle</span>
<a name="line-21"></a><span class='hs-definition'>open</span> <span class='hs-varid'>name</span> <span class='hs-varid'>mode</span> <span class='hs-keyglyph'>=</span>
<a name="line-22"></a> <span class='hs-varid'>ioToExceptionalSIO</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-varid'>openFile</span> <span class='hs-varid'>name</span> <span class='hs-varid'>mode</span>
<a name="line-23"></a>
<a name="line-24"></a><a name="with"></a><span class='hs-definition'>with</span> <span class='hs-keyglyph'>::</span>
<a name="line-25"></a> <span class='hs-conid'>FilePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IOMode</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Handle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EIO</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EIO</span> <span class='hs-varid'>r</span>
<a name="line-26"></a><span class='hs-definition'>with</span> <span class='hs-varid'>name</span> <span class='hs-varid'>mode</span> <span class='hs-keyglyph'>=</span>
<a name="line-27"></a> <span class='hs-varid'>bracketT</span> <span class='hs-layout'>(</span><span class='hs-varid'>open</span> <span class='hs-varid'>name</span> <span class='hs-varid'>mode</span><span class='hs-layout'>)</span> <span class='hs-varid'>close</span>
<a name="line-28"></a>
<a name="line-29"></a><a name="getChar"></a><span class='hs-definition'>getChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Handle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EIO</span> <span class='hs-conid'>Char</span>
<a name="line-30"></a><span class='hs-definition'>getChar</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span>
<a name="line-31"></a> <span class='hs-varid'>ioToExceptionalSIO</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-varid'>hGetChar</span> <span class='hs-varid'>h</span>
<a name="line-32"></a>
<a name="line-33"></a><a name="getContentsSynchronous"></a><span class='hs-definition'>getContentsSynchronous</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Handle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EIO</span> <span class='hs-conid'>String</span>
<a name="line-34"></a><span class='hs-definition'>getContentsSynchronous</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span>
<a name="line-35"></a> <span class='hs-conid'>Sync</span><span class='hs-varop'>.</span><span class='hs-varid'>manyT</span>
<a name="line-36"></a> <span class='hs-comment'>-- candidate for toMaybe from utility-ht</span>
<a name="line-37"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isEOFError</span> <span class='hs-varid'>e</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-38"></a> <span class='hs-layout'>(</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-varid'>getChar</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-39"></a>
<a name="line-40"></a><a name="getContentsAsynchronous"></a><span class='hs-comment'>{- |
<a name="line-41"></a>This calls 'unsafeInterleaveIO'.
<a name="line-42"></a>Maybe we should also attach 'unsafe' to this function name?
<a name="line-43"></a>We should use the LazyIO type and manyT here.
<a name="line-44"></a>-}</span>
<a name="line-45"></a><span class='hs-definition'>getContentsAsynchronous</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Handle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SIO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Async</span><span class='hs-varop'>.</span><span class='hs-conid'>Exceptional</span> <span class='hs-conid'>IOException</span> <span class='hs-conid'>String</span><span class='hs-layout'>)</span>
<a name="line-46"></a><span class='hs-definition'>getContentsAsynchronous</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span>
<a name="line-47"></a> <span class='hs-conid'>Async</span><span class='hs-varop'>.</span><span class='hs-varid'>manySynchronousT</span> <span class='hs-varid'>unsafeInterleaveSIO</span> <span class='hs-layout'>(</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-varid'>getChar</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-48"></a>
<a name="line-49"></a><a name="putChar"></a><span class='hs-definition'>putChar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Handle</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Char</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EIO</span> <span class='hs-conid'>()</span>
<a name="line-50"></a><span class='hs-definition'>putChar</span> <span class='hs-varid'>h</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span>
<a name="line-51"></a> <span class='hs-varid'>ioToExceptionalSIO</span> <span class='hs-varop'>$</span> <span class='hs-conid'>IO</span><span class='hs-varop'>.</span><span class='hs-varid'>hPutChar</span> <span class='hs-varid'>h</span> <span class='hs-varid'>c</span>
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