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% (c) The AQUA Project, Glasgow University, 1994-1998
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\section[ErrsUtils]{Utilities for error reporting}
\begin{code}
<pre><a name="line-1"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>ErrUtils</span> <span class='hs-layout'>(</span>
<a name="line-2"></a> <span class='hs-conid'>Message</span><span class='hs-layout'>,</span> <span class='hs-varid'>mkLocMessage</span><span class='hs-layout'>,</span> <span class='hs-varid'>printError</span><span class='hs-layout'>,</span>
<a name="line-3"></a> <span class='hs-conid'>Severity</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-4"></a>
<a name="line-5"></a> <span class='hs-conid'>ErrMsg</span><span class='hs-layout'>,</span> <span class='hs-conid'>WarnMsg</span><span class='hs-layout'>,</span>
<a name="line-6"></a> <span class='hs-conid'>ErrorMessages</span><span class='hs-layout'>,</span> <span class='hs-conid'>WarningMessages</span><span class='hs-layout'>,</span>
<a name="line-7"></a> <span class='hs-varid'>errMsgSpans</span><span class='hs-layout'>,</span> <span class='hs-varid'>errMsgContext</span><span class='hs-layout'>,</span> <span class='hs-varid'>errMsgShortDoc</span><span class='hs-layout'>,</span> <span class='hs-varid'>errMsgExtraInfo</span><span class='hs-layout'>,</span>
<a name="line-8"></a> <span class='hs-conid'>Messages</span><span class='hs-layout'>,</span> <span class='hs-varid'>errorsFound</span><span class='hs-layout'>,</span> <span class='hs-varid'>emptyMessages</span><span class='hs-layout'>,</span>
<a name="line-9"></a> <span class='hs-varid'>mkErrMsg</span><span class='hs-layout'>,</span> <span class='hs-varid'>mkPlainErrMsg</span><span class='hs-layout'>,</span> <span class='hs-varid'>mkLongErrMsg</span><span class='hs-layout'>,</span> <span class='hs-varid'>mkWarnMsg</span><span class='hs-layout'>,</span> <span class='hs-varid'>mkPlainWarnMsg</span><span class='hs-layout'>,</span>
<a name="line-10"></a> <span class='hs-varid'>printErrorsAndWarnings</span><span class='hs-layout'>,</span> <span class='hs-varid'>printBagOfErrors</span><span class='hs-layout'>,</span> <span class='hs-varid'>printBagOfWarnings</span><span class='hs-layout'>,</span>
<a name="line-11"></a> <span class='hs-varid'>warnIsErrorMsg</span><span class='hs-layout'>,</span> <span class='hs-varid'>mkLongWarnMsg</span><span class='hs-layout'>,</span>
<a name="line-12"></a>
<a name="line-13"></a> <span class='hs-varid'>ghcExit</span><span class='hs-layout'>,</span>
<a name="line-14"></a> <span class='hs-varid'>doIfSet</span><span class='hs-layout'>,</span> <span class='hs-varid'>doIfSet_dyn</span><span class='hs-layout'>,</span>
<a name="line-15"></a> <span class='hs-varid'>dumpIfSet</span><span class='hs-layout'>,</span> <span class='hs-varid'>dumpIf_core</span><span class='hs-layout'>,</span> <span class='hs-varid'>dumpIfSet_core</span><span class='hs-layout'>,</span> <span class='hs-varid'>dumpIfSet_dyn</span><span class='hs-layout'>,</span> <span class='hs-varid'>dumpIfSet_dyn_or</span><span class='hs-layout'>,</span>
<a name="line-16"></a> <span class='hs-varid'>mkDumpDoc</span><span class='hs-layout'>,</span> <span class='hs-varid'>dumpSDoc</span><span class='hs-layout'>,</span>
<a name="line-17"></a>
<a name="line-18"></a> <span class='hs-comment'>-- * Messages during compilation</span>
<a name="line-19"></a> <span class='hs-varid'>putMsg</span><span class='hs-layout'>,</span>
<a name="line-20"></a> <span class='hs-varid'>errorMsg</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-varid'>fatalErrorMsg</span><span class='hs-layout'>,</span>
<a name="line-22"></a> <span class='hs-varid'>compilationProgressMsg</span><span class='hs-layout'>,</span>
<a name="line-23"></a> <span class='hs-varid'>showPass</span><span class='hs-layout'>,</span>
<a name="line-24"></a> <span class='hs-varid'>debugTraceMsg</span><span class='hs-layout'>,</span>
<a name="line-25"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-26"></a>
<a name="line-27"></a><span class='hs-cpp'>#include "HsVersions.h"</span>
<a name="line-28"></a>
<a name="line-29"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Bag</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Bag</span><span class='hs-layout'>,</span> <span class='hs-varid'>bagToList</span><span class='hs-layout'>,</span> <span class='hs-varid'>isEmptyBag</span><span class='hs-layout'>,</span> <span class='hs-varid'>emptyBag</span> <span class='hs-layout'>)</span>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Util</span> <span class='hs-layout'>(</span> <span class='hs-varid'>sortLe</span> <span class='hs-layout'>)</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Outputable</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>SrcLoc</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>DynFlags</span> <span class='hs-layout'>(</span> <span class='hs-conid'>DynFlags</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>DynFlag</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'>dopt</span> <span class='hs-layout'>)</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>StaticFlags</span> <span class='hs-layout'>(</span> <span class='hs-varid'>opt_ErrorSpans</span> <span class='hs-layout'>)</span>
<a name="line-35"></a>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-37"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Exit</span> <span class='hs-layout'>(</span> <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> <span class='hs-varid'>exitWith</span> <span class='hs-layout'>)</span>
<a name="line-38"></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-39"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>IO</span>
<a name="line-40"></a>
<a name="line-41"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-42"></a><span class='hs-comment'>-- Basic error messages: just render a message with a source location.</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="Message"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>SDoc</span>
<a name="line-45"></a>
<a name="line-46"></a><a name="Severity"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Severity</span>
<a name="line-47"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>SevInfo</span>
<a name="line-48"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SevWarning</span>
<a name="line-49"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SevError</span>
<a name="line-50"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SevFatal</span>
<a name="line-51"></a>
<a name="line-52"></a><a name="mkLocMessage"></a><span class='hs-definition'>mkLocMessage</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SrcSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span>
<a name="line-53"></a><span class='hs-definition'>mkLocMessage</span> <span class='hs-varid'>locn</span> <span class='hs-varid'>msg</span>
<a name="line-54"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>opt_ErrorSpans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hang</span> <span class='hs-layout'>(</span><span class='hs-varid'>ppr</span> <span class='hs-varid'>locn</span> <span class='hs-varop'><></span> <span class='hs-varid'>colon</span><span class='hs-layout'>)</span> <span class='hs-num'>4</span> <span class='hs-varid'>msg</span>
<a name="line-55"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>hang</span> <span class='hs-layout'>(</span><span class='hs-varid'>ppr</span> <span class='hs-layout'>(</span><span class='hs-varid'>srcSpanStart</span> <span class='hs-varid'>locn</span><span class='hs-layout'>)</span> <span class='hs-varop'><></span> <span class='hs-varid'>colon</span><span class='hs-layout'>)</span> <span class='hs-num'>4</span> <span class='hs-varid'>msg</span>
<a name="line-56"></a> <span class='hs-comment'>-- always print the location, even if it is unhelpful. Error messages</span>
<a name="line-57"></a> <span class='hs-comment'>-- are supposed to be in a standard format, and one without a location</span>
<a name="line-58"></a> <span class='hs-comment'>-- would look strange. Better to say explicitly "<no location info>".</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="printError"></a><span class='hs-definition'>printError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SrcSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-61"></a><span class='hs-definition'>printError</span> <span class='hs-varid'>span</span> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>printErrs</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkLocMessage</span> <span class='hs-varid'>span</span> <span class='hs-varid'>msg</span> <span class='hs-varop'>$</span> <span class='hs-varid'>defaultErrStyle</span><span class='hs-layout'>)</span>
<a name="line-62"></a>
<a name="line-63"></a>
<a name="line-64"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-65"></a><span class='hs-comment'>-- Collecting up messages for later ordering and printing.</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="ErrMsg"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ErrMsg</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ErrMsg</span> <span class='hs-layout'>{</span>
<a name="line-68"></a> <span class='hs-varid'>errMsgSpans</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>SrcSpan</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span>
<a name="line-69"></a> <span class='hs-varid'>errMsgContext</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PrintUnqualified</span><span class='hs-layout'>,</span>
<a name="line-70"></a> <span class='hs-varid'>errMsgShortDoc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Message</span><span class='hs-layout'>,</span>
<a name="line-71"></a> <span class='hs-varid'>errMsgExtraInfo</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Message</span>
<a name="line-72"></a> <span class='hs-layout'>}</span>
<a name="line-73"></a> <span class='hs-comment'>-- The SrcSpan is used for sorting errors into line-number order</span>
<a name="line-74"></a>
<a name="line-75"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-conid'>ErrMsg</span> <span class='hs-keyword'>where</span>
<a name="line-76"></a> <span class='hs-varid'>show</span> <span class='hs-varid'>em</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showSDoc</span> <span class='hs-layout'>(</span><span class='hs-varid'>errMsgShortDoc</span> <span class='hs-varid'>em</span><span class='hs-layout'>)</span>
<a name="line-77"></a>
<a name="line-78"></a><a name="WarnMsg"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>WarnMsg</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ErrMsg</span>
<a name="line-79"></a>
<a name="line-80"></a><a name="mkErrMsg"></a><span class='hs-comment'>-- A short (one-line) error message, with context to tell us whether</span>
<a name="line-81"></a><span class='hs-comment'>-- to qualify names in the message or not.</span>
<a name="line-82"></a><span class='hs-definition'>mkErrMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SrcSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PrintUnqualified</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrMsg</span>
<a name="line-83"></a><span class='hs-definition'>mkErrMsg</span> <span class='hs-varid'>locn</span> <span class='hs-varid'>print_unqual</span> <span class='hs-varid'>msg</span>
<a name="line-84"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ErrMsg</span> <span class='hs-layout'>{</span> <span class='hs-varid'>errMsgSpans</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>locn</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-varid'>errMsgContext</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>print_unqual</span>
<a name="line-85"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>errMsgShortDoc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>msg</span><span class='hs-layout'>,</span> <span class='hs-varid'>errMsgExtraInfo</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span> <span class='hs-layout'>}</span>
<a name="line-86"></a>
<a name="line-87"></a><a name="mkPlainErrMsg"></a><span class='hs-comment'>-- Variant that doesn't care about qualified/unqualified names</span>
<a name="line-88"></a><span class='hs-definition'>mkPlainErrMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SrcSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrMsg</span>
<a name="line-89"></a><span class='hs-definition'>mkPlainErrMsg</span> <span class='hs-varid'>locn</span> <span class='hs-varid'>msg</span>
<a name="line-90"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ErrMsg</span> <span class='hs-layout'>{</span> <span class='hs-varid'>errMsgSpans</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>locn</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-varid'>errMsgContext</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>alwaysQualify</span>
<a name="line-91"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>errMsgShortDoc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>msg</span><span class='hs-layout'>,</span> <span class='hs-varid'>errMsgExtraInfo</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>empty</span> <span class='hs-layout'>}</span>
<a name="line-92"></a>
<a name="line-93"></a><a name="mkLongErrMsg"></a><span class='hs-comment'>-- A long (multi-line) error message, with context to tell us whether</span>
<a name="line-94"></a><span class='hs-comment'>-- to qualify names in the message or not.</span>
<a name="line-95"></a><span class='hs-definition'>mkLongErrMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SrcSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PrintUnqualified</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrMsg</span>
<a name="line-96"></a><span class='hs-definition'>mkLongErrMsg</span> <span class='hs-varid'>locn</span> <span class='hs-varid'>print_unqual</span> <span class='hs-varid'>msg</span> <span class='hs-varid'>extra</span>
<a name="line-97"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ErrMsg</span> <span class='hs-layout'>{</span> <span class='hs-varid'>errMsgSpans</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>locn</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-varid'>errMsgContext</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>print_unqual</span>
<a name="line-98"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>errMsgShortDoc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>msg</span><span class='hs-layout'>,</span> <span class='hs-varid'>errMsgExtraInfo</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>extra</span> <span class='hs-layout'>}</span>
<a name="line-99"></a>
<a name="line-100"></a><a name="mkWarnMsg"></a><span class='hs-definition'>mkWarnMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SrcSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PrintUnqualified</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>WarnMsg</span>
<a name="line-101"></a><span class='hs-definition'>mkWarnMsg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkErrMsg</span>
<a name="line-102"></a>
<a name="line-103"></a><a name="mkLongWarnMsg"></a><span class='hs-definition'>mkLongWarnMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SrcSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PrintUnqualified</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrMsg</span>
<a name="line-104"></a><span class='hs-definition'>mkLongWarnMsg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkLongErrMsg</span>
<a name="line-105"></a>
<a name="line-106"></a><a name="mkPlainWarnMsg"></a><span class='hs-comment'>-- Variant that doesn't care about qualified/unqualified names</span>
<a name="line-107"></a><span class='hs-definition'>mkPlainWarnMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>SrcSpan</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ErrMsg</span>
<a name="line-108"></a><span class='hs-definition'>mkPlainWarnMsg</span> <span class='hs-varid'>locn</span> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkWarnMsg</span> <span class='hs-varid'>locn</span> <span class='hs-varid'>alwaysQualify</span> <span class='hs-varid'>msg</span>
<a name="line-109"></a>
<a name="line-110"></a><a name="Messages"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Messages</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bag</span> <span class='hs-conid'>WarnMsg</span><span class='hs-layout'>,</span> <span class='hs-conid'>Bag</span> <span class='hs-conid'>ErrMsg</span><span class='hs-layout'>)</span>
<a name="line-111"></a>
<a name="line-112"></a><a name="WarningMessages"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>WarningMessages</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Bag</span> <span class='hs-conid'>WarnMsg</span>
<a name="line-113"></a><a name="ErrorMessages"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ErrorMessages</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Bag</span> <span class='hs-conid'>ErrMsg</span>
<a name="line-114"></a>
<a name="line-115"></a><a name="emptyMessages"></a><span class='hs-definition'>emptyMessages</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Messages</span>
<a name="line-116"></a><span class='hs-definition'>emptyMessages</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>emptyBag</span><span class='hs-layout'>,</span> <span class='hs-varid'>emptyBag</span><span class='hs-layout'>)</span>
<a name="line-117"></a>
<a name="line-118"></a><a name="warnIsErrorMsg"></a><span class='hs-definition'>warnIsErrorMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ErrMsg</span>
<a name="line-119"></a><span class='hs-definition'>warnIsErrorMsg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkPlainErrMsg</span> <span class='hs-varid'>noSrcSpan</span> <span class='hs-layout'>(</span><span class='hs-varid'>text</span> <span class='hs-str'>"\nFailing due to -Werror.\n"</span><span class='hs-layout'>)</span>
<a name="line-120"></a>
<a name="line-121"></a><a name="errorsFound"></a><span class='hs-definition'>errorsFound</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Messages</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-122"></a><span class='hs-comment'>-- The dyn-flags are used to see if the user has specified</span>
<a name="line-123"></a><span class='hs-comment'>-- -Werror, which says that warnings should be fatal</span>
<a name="line-124"></a><span class='hs-definition'>errorsFound</span> <span class='hs-varid'>dflags</span> <span class='hs-layout'>(</span><span class='hs-varid'>warns</span><span class='hs-layout'>,</span> <span class='hs-varid'>errs</span><span class='hs-layout'>)</span>
<a name="line-125"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>dopt</span> <span class='hs-conid'>Opt_WarnIsError</span> <span class='hs-varid'>dflags</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>isEmptyBag</span> <span class='hs-varid'>errs</span><span class='hs-layout'>)</span> <span class='hs-varop'>||</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>isEmptyBag</span> <span class='hs-varid'>warns</span><span class='hs-layout'>)</span>
<a name="line-126"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>not</span> <span class='hs-layout'>(</span><span class='hs-varid'>isEmptyBag</span> <span class='hs-varid'>errs</span><span class='hs-layout'>)</span>
<a name="line-127"></a>
<a name="line-128"></a><a name="printErrorsAndWarnings"></a><span class='hs-definition'>printErrorsAndWarnings</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Messages</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-129"></a><span class='hs-definition'>printErrorsAndWarnings</span> <span class='hs-varid'>dflags</span> <span class='hs-layout'>(</span><span class='hs-varid'>warns</span><span class='hs-layout'>,</span> <span class='hs-varid'>errs</span><span class='hs-layout'>)</span>
<a name="line-130"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>no_errs</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>no_warns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-131"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>no_errs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>printBagOfWarnings</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>warns</span>
<a name="line-132"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>dopt</span> <span class='hs-conid'>Opt_WarnIsError</span> <span class='hs-varid'>dflags</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-133"></a> <span class='hs-varid'>errorMsg</span> <span class='hs-varid'>dflags</span> <span class='hs-varop'>$</span>
<a name="line-134"></a> <span class='hs-varid'>text</span> <span class='hs-str'>"\nFailing due to -Werror.\n"</span>
<a name="line-135"></a> <span class='hs-comment'>-- Don't print any warnings if there are errors</span>
<a name="line-136"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>printBagOfErrors</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>errs</span>
<a name="line-137"></a> <span class='hs-keyword'>where</span>
<a name="line-138"></a> <span class='hs-varid'>no_warns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isEmptyBag</span> <span class='hs-varid'>warns</span>
<a name="line-139"></a> <span class='hs-varid'>no_errs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isEmptyBag</span> <span class='hs-varid'>errs</span>
<a name="line-140"></a>
<a name="line-141"></a><a name="printBagOfErrors"></a><span class='hs-definition'>printBagOfErrors</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bag</span> <span class='hs-conid'>ErrMsg</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-142"></a><span class='hs-definition'>printBagOfErrors</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>bag_of_errors</span>
<a name="line-143"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sequence_</span> <span class='hs-keyglyph'>[</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>style</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkErrStyle</span> <span class='hs-varid'>unqual</span>
<a name="line-144"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>log_action</span> <span class='hs-varid'>dflags</span> <span class='hs-conid'>SevError</span> <span class='hs-varid'>s</span> <span class='hs-varid'>style</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span> <span class='hs-varop'>$$</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-145"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ErrMsg</span> <span class='hs-layout'>{</span> <span class='hs-varid'>errMsgSpans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span>
<a name="line-146"></a> <span class='hs-varid'>errMsgShortDoc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span><span class='hs-layout'>,</span>
<a name="line-147"></a> <span class='hs-varid'>errMsgExtraInfo</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>e</span><span class='hs-layout'>,</span>
<a name="line-148"></a> <span class='hs-varid'>errMsgContext</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unqual</span> <span class='hs-layout'>}</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>sorted_errs</span> <span class='hs-keyglyph'>]</span>
<a name="line-149"></a> <span class='hs-keyword'>where</span>
<a name="line-150"></a> <span class='hs-varid'>bag_ls</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bagToList</span> <span class='hs-varid'>bag_of_errors</span>
<a name="line-151"></a> <span class='hs-varid'>sorted_errs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sortLe</span> <span class='hs-varid'>occ'ed_before</span> <span class='hs-varid'>bag_ls</span>
<a name="line-152"></a>
<a name="line-153"></a> <span class='hs-varid'>occ'ed_before</span> <span class='hs-varid'>err1</span> <span class='hs-varid'>err2</span> <span class='hs-keyglyph'>=</span>
<a name="line-154"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>compare</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-layout'>(</span><span class='hs-varid'>errMsgSpans</span> <span class='hs-varid'>err1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-layout'>(</span><span class='hs-varid'>errMsgSpans</span> <span class='hs-varid'>err2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-155"></a> <span class='hs-conid'>LT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-156"></a> <span class='hs-conid'>EQ</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-157"></a> <span class='hs-conid'>GT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>False</span>
<a name="line-158"></a>
<a name="line-159"></a><a name="printBagOfWarnings"></a><span class='hs-definition'>printBagOfWarnings</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bag</span> <span class='hs-conid'>ErrMsg</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-160"></a><span class='hs-definition'>printBagOfWarnings</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>bag_of_warns</span>
<a name="line-161"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sequence_</span> <span class='hs-keyglyph'>[</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>style</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkErrStyle</span> <span class='hs-varid'>unqual</span>
<a name="line-162"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>log_action</span> <span class='hs-varid'>dflags</span> <span class='hs-conid'>SevWarning</span> <span class='hs-varid'>s</span> <span class='hs-varid'>style</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span> <span class='hs-varop'>$$</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-163"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>ErrMsg</span> <span class='hs-layout'>{</span> <span class='hs-varid'>errMsgSpans</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span><span class='hs-conop'>:</span><span class='hs-keyword'>_</span><span class='hs-layout'>,</span>
<a name="line-164"></a> <span class='hs-varid'>errMsgShortDoc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>d</span><span class='hs-layout'>,</span>
<a name="line-165"></a> <span class='hs-varid'>errMsgExtraInfo</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>e</span><span class='hs-layout'>,</span>
<a name="line-166"></a> <span class='hs-varid'>errMsgContext</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unqual</span> <span class='hs-layout'>}</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>sorted_errs</span> <span class='hs-keyglyph'>]</span>
<a name="line-167"></a> <span class='hs-keyword'>where</span>
<a name="line-168"></a> <span class='hs-varid'>bag_ls</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>bagToList</span> <span class='hs-varid'>bag_of_warns</span>
<a name="line-169"></a> <span class='hs-varid'>sorted_errs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sortLe</span> <span class='hs-varid'>occ'ed_before</span> <span class='hs-varid'>bag_ls</span>
<a name="line-170"></a>
<a name="line-171"></a> <span class='hs-varid'>occ'ed_before</span> <span class='hs-varid'>err1</span> <span class='hs-varid'>err2</span> <span class='hs-keyglyph'>=</span>
<a name="line-172"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>compare</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-layout'>(</span><span class='hs-varid'>errMsgSpans</span> <span class='hs-varid'>err1</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-layout'>(</span><span class='hs-varid'>errMsgSpans</span> <span class='hs-varid'>err2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyword'>of</span>
<a name="line-173"></a> <span class='hs-conid'>LT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-174"></a> <span class='hs-conid'>EQ</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-175"></a> <span class='hs-conid'>GT</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>False</span>
<a name="line-176"></a>
<a name="line-177"></a><a name="ghcExit"></a><span class='hs-definition'>ghcExit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-178"></a><span class='hs-definition'>ghcExit</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>val</span>
<a name="line-179"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>val</span> <span class='hs-varop'>==</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>exitWith</span> <span class='hs-conid'>ExitSuccess</span>
<a name="line-180"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>errorMsg</span> <span class='hs-varid'>dflags</span> <span class='hs-layout'>(</span><span class='hs-varid'>text</span> <span class='hs-str'>"\nCompilation had errors\n\n"</span><span class='hs-layout'>)</span>
<a name="line-181"></a> <span class='hs-varid'>exitWith</span> <span class='hs-layout'>(</span><span class='hs-conid'>ExitFailure</span> <span class='hs-varid'>val</span><span class='hs-layout'>)</span>
<a name="line-182"></a>
<a name="line-183"></a><a name="doIfSet"></a><span class='hs-definition'>doIfSet</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-184"></a><span class='hs-definition'>doIfSet</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>flag</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>action</span>
<a name="line-185"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-186"></a>
<a name="line-187"></a><a name="doIfSet_dyn"></a><span class='hs-definition'>doIfSet_dyn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DynFlag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span><span class='hs-conid'>()</span>
<a name="line-188"></a><span class='hs-definition'>doIfSet_dyn</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>action</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>dopt</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>dflags</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>action</span>
<a name="line-189"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</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'>-- Dumping</span>
<a name="line-193"></a>
<a name="line-194"></a><a name="dumpIfSet"></a><span class='hs-definition'>dumpIfSet</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SDoc</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-195"></a><span class='hs-definition'>dumpIfSet</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span>
<a name="line-196"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>not</span> <span class='hs-varid'>flag</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-197"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>printDump</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkDumpDoc</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span><span class='hs-layout'>)</span>
<a name="line-198"></a>
<a name="line-199"></a><a name="dumpIf_core"></a><span class='hs-definition'>dumpIf_core</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DynFlag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SDoc</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-200"></a><span class='hs-definition'>dumpIf_core</span> <span class='hs-varid'>cond</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>dflag</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span>
<a name="line-201"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>cond</span>
<a name="line-202"></a> <span class='hs-varop'>||</span> <span class='hs-varid'>verbosity</span> <span class='hs-varid'>dflags</span> <span class='hs-varop'>>=</span> <span class='hs-num'>4</span>
<a name="line-203"></a> <span class='hs-varop'>||</span> <span class='hs-varid'>dopt</span> <span class='hs-conid'>Opt_D_verbose_core2core</span> <span class='hs-varid'>dflags</span>
<a name="line-204"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dumpSDoc</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>dflag</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span>
<a name="line-205"></a>
<a name="line-206"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-207"></a>
<a name="line-208"></a><a name="dumpIfSet_core"></a><span class='hs-definition'>dumpIfSet_core</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DynFlag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SDoc</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-209"></a><span class='hs-definition'>dumpIfSet_core</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span>
<a name="line-210"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dumpIf_core</span> <span class='hs-layout'>(</span><span class='hs-varid'>dopt</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>dflags</span><span class='hs-layout'>)</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span>
<a name="line-211"></a>
<a name="line-212"></a><a name="dumpIfSet_dyn"></a><span class='hs-definition'>dumpIfSet_dyn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DynFlag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SDoc</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-213"></a><span class='hs-definition'>dumpIfSet_dyn</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span>
<a name="line-214"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>dopt</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>dflags</span> <span class='hs-varop'>||</span> <span class='hs-varid'>verbosity</span> <span class='hs-varid'>dflags</span> <span class='hs-varop'>>=</span> <span class='hs-num'>4</span>
<a name="line-215"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dumpSDoc</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span>
<a name="line-216"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span>
<a name="line-217"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-218"></a>
<a name="line-219"></a><a name="dumpIfSet_dyn_or"></a><span class='hs-definition'>dumpIfSet_dyn_or</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>DynFlag</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SDoc</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-220"></a><span class='hs-definition'>dumpIfSet_dyn_or</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>flags</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span>
<a name="line-221"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>or</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>dopt</span> <span class='hs-varid'>flag</span> <span class='hs-varid'>dflags</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>flag</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>flags</span><span class='hs-keyglyph'>]</span>
<a name="line-222"></a> <span class='hs-varop'>||</span> <span class='hs-varid'>verbosity</span> <span class='hs-varid'>dflags</span> <span class='hs-varop'>>=</span> <span class='hs-num'>4</span>
<a name="line-223"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>printDump</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkDumpDoc</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span><span class='hs-layout'>)</span>
<a name="line-224"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-225"></a>
<a name="line-226"></a><a name="mkDumpDoc"></a><span class='hs-definition'>mkDumpDoc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SDoc</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SDoc</span>
<a name="line-227"></a><span class='hs-definition'>mkDumpDoc</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span>
<a name="line-228"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vcat</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>text</span> <span class='hs-str'>""</span><span class='hs-layout'>,</span>
<a name="line-229"></a> <span class='hs-varid'>line</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-varid'>hdr</span> <span class='hs-varop'><+></span> <span class='hs-varid'>line</span><span class='hs-layout'>,</span>
<a name="line-230"></a> <span class='hs-varid'>doc</span><span class='hs-layout'>,</span>
<a name="line-231"></a> <span class='hs-varid'>text</span> <span class='hs-str'>""</span><span class='hs-keyglyph'>]</span>
<a name="line-232"></a> <span class='hs-keyword'>where</span>
<a name="line-233"></a> <span class='hs-varid'>line</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>text</span> <span class='hs-layout'>(</span><span class='hs-varid'>replicate</span> <span class='hs-num'>20</span> <span class='hs-chr'>'='</span><span class='hs-layout'>)</span>
<a name="line-234"></a>
<a name="line-235"></a>
<a name="line-236"></a><a name="dumpSDoc"></a><span class='hs-comment'>-- | Write out a dump.</span>
<a name="line-237"></a><span class='hs-comment'>-- If --dump-to-file is set then this goes to a file.</span>
<a name="line-238"></a><span class='hs-comment'>-- otherwise emit to stdout.</span>
<a name="line-239"></a><span class='hs-definition'>dumpSDoc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DynFlag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>SDoc</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-240"></a><span class='hs-definition'>dumpSDoc</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>dflag</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span>
<a name="line-241"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>mFile</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>chooseDumpFile</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>dflag</span>
<a name="line-242"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mFile</span> <span class='hs-keyword'>of</span>
<a name="line-243"></a> <span class='hs-comment'>-- write the dump to a file</span>
<a name="line-244"></a> <span class='hs-comment'>-- don't add the header in this case, we can see what kind</span>
<a name="line-245"></a> <span class='hs-comment'>-- of dump it is from the filename.</span>
<a name="line-246"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>fileName</span>
<a name="line-247"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>handle</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>openFile</span> <span class='hs-varid'>fileName</span> <span class='hs-conid'>AppendMode</span>
<a name="line-248"></a> <span class='hs-varid'>hPrintDump</span> <span class='hs-varid'>handle</span> <span class='hs-varid'>doc</span>
<a name="line-249"></a> <span class='hs-varid'>hClose</span> <span class='hs-varid'>handle</span>
<a name="line-250"></a>
<a name="line-251"></a> <span class='hs-comment'>-- write the dump to stdout</span>
<a name="line-252"></a> <span class='hs-conid'>Nothing</span>
<a name="line-253"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span> <span class='hs-varid'>printDump</span> <span class='hs-layout'>(</span><span class='hs-varid'>mkDumpDoc</span> <span class='hs-varid'>hdr</span> <span class='hs-varid'>doc</span><span class='hs-layout'>)</span>
<a name="line-254"></a>
<a name="line-255"></a>
<a name="line-256"></a><a name="chooseDumpFile"></a><span class='hs-comment'>-- | Choose where to put a dump file based on DynFlags</span>
<a name="line-257"></a><span class='hs-comment'>--</span>
<a name="line-258"></a><span class='hs-definition'>chooseDumpFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>DynFlag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>String</span>
<a name="line-259"></a><span class='hs-definition'>chooseDumpFile</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>dflag</span>
<a name="line-260"></a>
<a name="line-261"></a> <span class='hs-comment'>-- dump file location is being forced</span>
<a name="line-262"></a> <span class='hs-comment'>-- by the --ddump-file-prefix flag.</span>
<a name="line-263"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>dumpToFile</span>
<a name="line-264"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>prefix</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>dumpPrefixForce</span> <span class='hs-varid'>dflags</span>
<a name="line-265"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>prefix</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>beautifyDumpName</span> <span class='hs-varid'>dflag</span><span class='hs-layout'>)</span>
<a name="line-266"></a>
<a name="line-267"></a> <span class='hs-comment'>-- dump file location chosen by DriverPipeline.runPipeline</span>
<a name="line-268"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>dumpToFile</span>
<a name="line-269"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>prefix</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>dumpPrefix</span> <span class='hs-varid'>dflags</span>
<a name="line-270"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varop'>$</span> <span class='hs-varid'>prefix</span> <span class='hs-varop'>++</span> <span class='hs-layout'>(</span><span class='hs-varid'>beautifyDumpName</span> <span class='hs-varid'>dflag</span><span class='hs-layout'>)</span>
<a name="line-271"></a>
<a name="line-272"></a> <span class='hs-comment'>-- we haven't got a place to put a dump file.</span>
<a name="line-273"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span>
<a name="line-274"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-275"></a>
<a name="line-276"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>dumpToFile</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>dopt</span> <span class='hs-conid'>Opt_DumpToFile</span> <span class='hs-varid'>dflags</span>
<a name="line-277"></a>
<a name="line-278"></a>
<a name="line-279"></a><a name="beautifyDumpName"></a><span class='hs-comment'>-- | Build a nice file name from name of a DynFlag constructor</span>
<a name="line-280"></a><span class='hs-definition'>beautifyDumpName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlag</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-281"></a><span class='hs-definition'>beautifyDumpName</span> <span class='hs-varid'>dflag</span>
<a name="line-282"></a> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>let</span> <span class='hs-varid'>str</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>show</span> <span class='hs-varid'>dflag</span>
<a name="line-283"></a> <span class='hs-varid'>cut</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>isPrefixOf</span> <span class='hs-str'>"Opt_D_"</span> <span class='hs-varid'>str</span>
<a name="line-284"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>drop</span> <span class='hs-num'>6</span> <span class='hs-varid'>str</span>
<a name="line-285"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>str</span>
<a name="line-286"></a> <span class='hs-varid'>dash</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>c</span> <span class='hs-keyword'>of</span>
<a name="line-287"></a> <span class='hs-chr'>'_'</span> <span class='hs-keyglyph'>-></span> <span class='hs-chr'>'-'</span>
<a name="line-288"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-289"></a> <span class='hs-varid'>cut</span>
<a name="line-290"></a> <span class='hs-keyword'>in</span> <span class='hs-varid'>dash</span>
<a name="line-291"></a>
<a name="line-292"></a>
<a name="line-293"></a><span class='hs-comment'>-- -----------------------------------------------------------------------------</span>
<a name="line-294"></a><span class='hs-comment'>-- Outputting messages from the compiler</span>
<a name="line-295"></a>
<a name="line-296"></a><span class='hs-comment'>-- We want all messages to go through one place, so that we can</span>
<a name="line-297"></a><span class='hs-comment'>-- redirect them if necessary. For example, when GHC is used as a</span>
<a name="line-298"></a><span class='hs-comment'>-- library we might want to catch all messages that GHC tries to</span>
<a name="line-299"></a><span class='hs-comment'>-- output and do something else with them.</span>
<a name="line-300"></a>
<a name="line-301"></a><a name="ifVerbose"></a><span class='hs-definition'>ifVerbose</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-302"></a><span class='hs-definition'>ifVerbose</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>val</span> <span class='hs-varid'>act</span>
<a name="line-303"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>verbosity</span> <span class='hs-varid'>dflags</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>val</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>act</span>
<a name="line-304"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-305"></a>
<a name="line-306"></a><a name="putMsg"></a><span class='hs-definition'>putMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-307"></a><span class='hs-definition'>putMsg</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>log_action</span> <span class='hs-varid'>dflags</span> <span class='hs-conid'>SevInfo</span> <span class='hs-varid'>noSrcSpan</span> <span class='hs-varid'>defaultUserStyle</span> <span class='hs-varid'>msg</span>
<a name="line-308"></a>
<a name="line-309"></a><a name="errorMsg"></a><span class='hs-definition'>errorMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-310"></a><span class='hs-definition'>errorMsg</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>log_action</span> <span class='hs-varid'>dflags</span> <span class='hs-conid'>SevError</span> <span class='hs-varid'>noSrcSpan</span> <span class='hs-varid'>defaultErrStyle</span> <span class='hs-varid'>msg</span>
<a name="line-311"></a>
<a name="line-312"></a><a name="fatalErrorMsg"></a><span class='hs-definition'>fatalErrorMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-313"></a><span class='hs-definition'>fatalErrorMsg</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>msg</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>log_action</span> <span class='hs-varid'>dflags</span> <span class='hs-conid'>SevFatal</span> <span class='hs-varid'>noSrcSpan</span> <span class='hs-varid'>defaultErrStyle</span> <span class='hs-varid'>msg</span>
<a name="line-314"></a>
<a name="line-315"></a><a name="compilationProgressMsg"></a><span class='hs-definition'>compilationProgressMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-316"></a><span class='hs-definition'>compilationProgressMsg</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>msg</span>
<a name="line-317"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ifVerbose</span> <span class='hs-varid'>dflags</span> <span class='hs-num'>1</span> <span class='hs-layout'>(</span><span class='hs-varid'>log_action</span> <span class='hs-varid'>dflags</span> <span class='hs-conid'>SevInfo</span> <span class='hs-varid'>noSrcSpan</span> <span class='hs-varid'>defaultUserStyle</span> <span class='hs-layout'>(</span><span class='hs-varid'>text</span> <span class='hs-varid'>msg</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-318"></a>
<a name="line-319"></a><a name="showPass"></a><span class='hs-definition'>showPass</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-320"></a><span class='hs-definition'>showPass</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>what</span>
<a name="line-321"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ifVerbose</span> <span class='hs-varid'>dflags</span> <span class='hs-num'>2</span> <span class='hs-layout'>(</span><span class='hs-varid'>log_action</span> <span class='hs-varid'>dflags</span> <span class='hs-conid'>SevInfo</span> <span class='hs-varid'>noSrcSpan</span> <span class='hs-varid'>defaultUserStyle</span> <span class='hs-layout'>(</span><span class='hs-varid'>text</span> <span class='hs-str'>"***"</span> <span class='hs-varop'><+></span> <span class='hs-varid'>text</span> <span class='hs-varid'>what</span> <span class='hs-varop'><></span> <span class='hs-varid'>colon</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-322"></a>
<a name="line-323"></a><a name="debugTraceMsg"></a><span class='hs-definition'>debugTraceMsg</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DynFlags</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Message</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-conid'>()</span>
<a name="line-324"></a><span class='hs-definition'>debugTraceMsg</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>val</span> <span class='hs-varid'>msg</span>
<a name="line-325"></a> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ifVerbose</span> <span class='hs-varid'>dflags</span> <span class='hs-varid'>val</span> <span class='hs-layout'>(</span><span class='hs-varid'>log_action</span> <span class='hs-varid'>dflags</span> <span class='hs-conid'>SevInfo</span> <span class='hs-varid'>noSrcSpan</span> <span class='hs-varid'>defaultDumpStyle</span> <span class='hs-varid'>msg</span><span class='hs-layout'>)</span>
<a name="line-326"></a>
</pre>\end{code}
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