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<title>src/full/Agda/Interaction/FindFile.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- | Functions which map between module names and file names.</span>
<a name="line-3"></a><span class='hs-comment'>--</span>
<a name="line-4"></a><span class='hs-comment'>-- Note that file name lookups are cached in the 'TCState'. The code</span>
<a name="line-5"></a><span class='hs-comment'>-- assumes that no Agda source files are added or removed from the</span>
<a name="line-6"></a><span class='hs-comment'>-- include directories while the code is being type checked.</span>
<a name="line-7"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-8"></a>
<a name="line-9"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Interaction</span><span class='hs-varop'>.</span><span class='hs-conid'>FindFile</span>
<a name="line-10"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>toIFile</span>
<a name="line-11"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>FindError</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'>findErrorToTypeError</span>
<a name="line-12"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>findFile</span><span class='hs-layout'>,</span> <span class='hs-varid'>findFile'</span><span class='hs-layout'>,</span> <span class='hs-varid'>findFile''</span>
<a name="line-13"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>findInterfaceFile</span>
<a name="line-14"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>checkModuleName</span>
<a name="line-15"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>moduleName'</span><span class='hs-layout'>,</span> <span class='hs-varid'>moduleName</span>
<a name="line-16"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ModuleToSource</span>
<a name="line-17"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>SourceToModule</span><span class='hs-layout'>,</span> <span class='hs-varid'>sourceToModule</span>
<a name="line-18"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>tests</span>
<a name="line-19"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-20"></a>
<a name="line-21"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span>
<a name="line-22"></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-23"></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'>State</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span>
<a name="line-24"></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'>Trans</span>
<a name="line-25"></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-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Map</span> <span class='hs-layout'>(</span><span class='hs-conid'>Map</span><span class='hs-layout'>)</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Map</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Map</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>FilePath</span>
<a name="line-29"></a>
<a name="line-30"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Concrete</span>
<a name="line-31"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span><span class='hs-varop'>.</span><span class='hs-conid'>Parser</span>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Base</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-comment'>{-# SOURCE #-}</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>TypeChecking</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Options</span> <span class='hs-layout'>(</span><span class='hs-varid'>getIncludeDirs</span><span class='hs-layout'>)</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Agda</span><span class='hs-varop'>.</span><span class='hs-conid'>Utils</span><span class='hs-varop'>.</span><span class='hs-conid'>FileName</span>
<a name="line-35"></a>
<a name="line-36"></a><span class='hs-comment'>-- | Converts an Agda file name to the corresponding interface file</span>
<a name="line-37"></a><span class='hs-comment'>-- name.</span>
<a name="line-38"></a>
<a name="line-39"></a><a name="toIFile"></a><span class='hs-definition'>toIFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AbsolutePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>AbsolutePath</span>
<a name="line-40"></a><span class='hs-definition'>toIFile</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mkAbsolute</span> <span class='hs-layout'>(</span><span class='hs-varid'>replaceExtension</span> <span class='hs-layout'>(</span><span class='hs-varid'>filePath</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-str'>".agdai"</span><span class='hs-layout'>)</span>
<a name="line-41"></a>
<a name="line-42"></a><span class='hs-comment'>-- | Errors which can arise when trying to find a source file.</span>
<a name="line-43"></a><span class='hs-comment'>--</span>
<a name="line-44"></a><span class='hs-comment'>-- Invariant: All paths are absolute.</span>
<a name="line-45"></a>
<a name="line-46"></a><a name="FindError"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FindError</span>
<a name="line-47"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NotFound</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>AbsolutePath</span><span class='hs-keyglyph'>]</span>
<a name="line-48"></a> <span class='hs-comment'>-- ^ The file was not found. It should have had one of the given</span>
<a name="line-49"></a> <span class='hs-comment'>-- file names.</span>
<a name="line-50"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Ambiguous</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>AbsolutePath</span><span class='hs-keyglyph'>]</span>
<a name="line-51"></a> <span class='hs-comment'>-- ^ Several matching files were found.</span>
<a name="line-52"></a> <span class='hs-comment'>--</span>
<a name="line-53"></a> <span class='hs-comment'>-- Invariant: The list of matching files has at least two</span>
<a name="line-54"></a> <span class='hs-comment'>-- elements.</span>
<a name="line-55"></a>
<a name="line-56"></a><span class='hs-comment'>-- | Given the module name which the error applies to this function</span>
<a name="line-57"></a><span class='hs-comment'>-- converts a 'FindError' to a 'TypeError'.</span>
<a name="line-58"></a>
<a name="line-59"></a><a name="findErrorToTypeError"></a><span class='hs-definition'>findErrorToTypeError</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TopLevelModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FindError</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TypeError</span>
<a name="line-60"></a><span class='hs-definition'>findErrorToTypeError</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>NotFound</span> <span class='hs-varid'>files</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FileNotFound</span> <span class='hs-varid'>m</span> <span class='hs-varid'>files</span>
<a name="line-61"></a><span class='hs-definition'>findErrorToTypeError</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ambiguous</span> <span class='hs-varid'>files</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-62"></a> <span class='hs-conid'>AmbiguousTopLevelModuleName</span> <span class='hs-varid'>m</span> <span class='hs-varid'>files</span>
<a name="line-63"></a>
<a name="line-64"></a><span class='hs-comment'>-- | Finds the source file corresponding to a given top-level module</span>
<a name="line-65"></a><span class='hs-comment'>-- name. The returned paths are absolute.</span>
<a name="line-66"></a><span class='hs-comment'>--</span>
<a name="line-67"></a><span class='hs-comment'>-- Raises an error if the file cannot be found.</span>
<a name="line-68"></a>
<a name="line-69"></a><a name="findFile"></a><span class='hs-definition'>findFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TopLevelModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>AbsolutePath</span>
<a name="line-70"></a><span class='hs-definition'>findFile</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-71"></a> <span class='hs-varid'>mf</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>findFile'</span> <span class='hs-varid'>m</span>
<a name="line-72"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>mf</span> <span class='hs-keyword'>of</span>
<a name="line-73"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-varid'>findErrorToTypeError</span> <span class='hs-varid'>m</span> <span class='hs-varid'>err</span>
<a name="line-74"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>f</span>
<a name="line-75"></a>
<a name="line-76"></a><span class='hs-comment'>-- | Tries to find the source file corresponding to a given top-level</span>
<a name="line-77"></a><span class='hs-comment'>-- module name. The returned paths are absolute.</span>
<a name="line-78"></a>
<a name="line-79"></a><a name="findFile'"></a><span class='hs-definition'>findFile'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TopLevelModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>FindError</span> <span class='hs-conid'>AbsolutePath</span><span class='hs-layout'>)</span>
<a name="line-80"></a><span class='hs-definition'>findFile'</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-81"></a> <span class='hs-varid'>dirs</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getIncludeDirs</span>
<a name="line-82"></a> <span class='hs-varid'>modFile</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>stModuleToSource</span> <span class='hs-varop'><$></span> <span class='hs-varid'>get</span>
<a name="line-83"></a> <span class='hs-layout'>(</span><span class='hs-varid'>r</span><span class='hs-layout'>,</span> <span class='hs-varid'>modFile</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>findFile''</span> <span class='hs-varid'>dirs</span> <span class='hs-varid'>m</span> <span class='hs-varid'>modFile</span>
<a name="line-84"></a> <span class='hs-varid'>modify</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-layout'>{</span> <span class='hs-varid'>stModuleToSource</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>modFile</span> <span class='hs-layout'>}</span>
<a name="line-85"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>r</span>
<a name="line-86"></a>
<a name="line-87"></a><span class='hs-comment'>-- | A variant of 'findFile'' which does not require 'TCM'.</span>
<a name="line-88"></a>
<a name="line-89"></a><a name="findFile''"></a><span class='hs-definition'>findFile''</span>
<a name="line-90"></a> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>AbsolutePath</span><span class='hs-keyglyph'>]</span>
<a name="line-91"></a> <span class='hs-comment'>-- ^ Include paths.</span>
<a name="line-92"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TopLevelModuleName</span>
<a name="line-93"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ModuleToSource</span>
<a name="line-94"></a> <span class='hs-comment'>-- ^ Cached invocations of 'findFile'''. An updated copy is returned.</span>
<a name="line-95"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>FindError</span> <span class='hs-conid'>AbsolutePath</span><span class='hs-layout'>,</span> <span class='hs-conid'>ModuleToSource</span><span class='hs-layout'>)</span>
<a name="line-96"></a><span class='hs-definition'>findFile''</span> <span class='hs-varid'>dirs</span> <span class='hs-varid'>m</span> <span class='hs-varid'>modFile</span> <span class='hs-keyglyph'>=</span>
<a name="line-97"></a> <span class='hs-keyword'>case</span> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>m</span> <span class='hs-varid'>modFile</span> <span class='hs-keyword'>of</span>
<a name="line-98"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-varid'>modFile</span><span class='hs-layout'>)</span>
<a name="line-99"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-100"></a> <span class='hs-varid'>files</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mapM</span> <span class='hs-varid'>absolute</span>
<a name="line-101"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>filePath</span> <span class='hs-varid'>dir</span> <span class='hs-varop'></></span> <span class='hs-varid'>file</span>
<a name="line-102"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>dir</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>dirs</span>
<a name="line-103"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>file</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>moduleNameToFileName</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-104"></a> <span class='hs-keyglyph'>[</span><span class='hs-str'>".agda"</span><span class='hs-layout'>,</span> <span class='hs-str'>".lagda"</span><span class='hs-keyglyph'>]</span>
<a name="line-105"></a> <span class='hs-keyglyph'>]</span>
<a name="line-106"></a> <span class='hs-varid'>existingFiles</span> <span class='hs-keyglyph'><-</span>
<a name="line-107"></a> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>filterM</span> <span class='hs-layout'>(</span><span class='hs-varid'>doesFileExistCaseSensitive</span> <span class='hs-varop'>.</span> <span class='hs-varid'>filePath</span><span class='hs-layout'>)</span> <span class='hs-varid'>files</span>
<a name="line-108"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>nub</span> <span class='hs-varid'>existingFiles</span> <span class='hs-keyword'>of</span>
<a name="line-109"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-conid'>NotFound</span> <span class='hs-varid'>files</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>modFile</span><span class='hs-layout'>)</span>
<a name="line-110"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>file</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>file</span><span class='hs-layout'>,</span> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>m</span> <span class='hs-varid'>file</span> <span class='hs-varid'>modFile</span><span class='hs-layout'>)</span>
<a name="line-111"></a> <span class='hs-varid'>files</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ambiguous</span> <span class='hs-varid'>files</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>modFile</span><span class='hs-layout'>)</span>
<a name="line-112"></a>
<a name="line-113"></a><span class='hs-comment'>-- | Finds the interface file corresponding to a given top-level</span>
<a name="line-114"></a><span class='hs-comment'>-- module name. The returned paths are absolute.</span>
<a name="line-115"></a><span class='hs-comment'>--</span>
<a name="line-116"></a><span class='hs-comment'>-- Raises an error if the source file cannot be found, and returns</span>
<a name="line-117"></a><span class='hs-comment'>-- 'Nothing' if the source file can be found but not the interface</span>
<a name="line-118"></a><span class='hs-comment'>-- file.</span>
<a name="line-119"></a>
<a name="line-120"></a><a name="findInterfaceFile"></a><span class='hs-definition'>findInterfaceFile</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TopLevelModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>AbsolutePath</span><span class='hs-layout'>)</span>
<a name="line-121"></a><span class='hs-definition'>findInterfaceFile</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-122"></a> <span class='hs-varid'>f</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>toIFile</span> <span class='hs-varop'><$></span> <span class='hs-varid'>findFile</span> <span class='hs-varid'>m</span>
<a name="line-123"></a> <span class='hs-varid'>ex</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>doesFileExistCaseSensitive</span> <span class='hs-varop'>$</span> <span class='hs-varid'>filePath</span> <span class='hs-varid'>f</span>
<a name="line-124"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>ex</span> <span class='hs-keyword'>then</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>else</span> <span class='hs-conid'>Nothing</span>
<a name="line-125"></a>
<a name="line-126"></a><span class='hs-comment'>-- | Ensures that the module name matches the file name. The file</span>
<a name="line-127"></a><span class='hs-comment'>-- corresponding to the module name (according to the include path)</span>
<a name="line-128"></a><span class='hs-comment'>-- has to be the same as the given file name.</span>
<a name="line-129"></a>
<a name="line-130"></a><a name="checkModuleName"></a><span class='hs-definition'>checkModuleName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TopLevelModuleName</span>
<a name="line-131"></a> <span class='hs-comment'>-- ^ The name of the module.</span>
<a name="line-132"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>AbsolutePath</span>
<a name="line-133"></a> <span class='hs-comment'>-- ^ The file from which it was loaded.</span>
<a name="line-134"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>()</span>
<a name="line-135"></a><span class='hs-definition'>checkModuleName</span> <span class='hs-varid'>name</span> <span class='hs-varid'>file</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-136"></a> <span class='hs-varid'>moduleShouldBeIn</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>findFile'</span> <span class='hs-varid'>name</span>
<a name="line-137"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>moduleShouldBeIn</span> <span class='hs-keyword'>of</span>
<a name="line-138"></a> <span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-conid'>NotFound</span> <span class='hs-varid'>files</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span>
<a name="line-139"></a> <span class='hs-conid'>ModuleNameDoesntMatchFileName</span> <span class='hs-varid'>name</span> <span class='hs-varid'>files</span>
<a name="line-140"></a> <span class='hs-conid'>Left</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ambiguous</span> <span class='hs-varid'>files</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span>
<a name="line-141"></a> <span class='hs-conid'>AmbiguousTopLevelModuleName</span> <span class='hs-varid'>name</span> <span class='hs-varid'>files</span>
<a name="line-142"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>file'</span> <span class='hs-keyglyph'>-></span>
<a name="line-143"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>file</span> <span class='hs-varop'>===</span> <span class='hs-varid'>file'</span> <span class='hs-keyword'>then</span>
<a name="line-144"></a> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-145"></a> <span class='hs-keyword'>else</span>
<a name="line-146"></a> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>ModuleDefinedInOtherFile</span> <span class='hs-varid'>name</span> <span class='hs-varid'>file</span> <span class='hs-varid'>file'</span>
<a name="line-147"></a>
<a name="line-148"></a><span class='hs-comment'>-- | Computes the module name of the top-level module in the given</span>
<a name="line-149"></a><span class='hs-comment'>-- file.</span>
<a name="line-150"></a>
<a name="line-151"></a><a name="moduleName'"></a><span class='hs-definition'>moduleName'</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AbsolutePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>TopLevelModuleName</span>
<a name="line-152"></a><span class='hs-definition'>moduleName'</span> <span class='hs-varid'>file</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-153"></a> <span class='hs-varid'>topLevelModuleName</span> <span class='hs-varop'><$></span> <span class='hs-varid'>parseFile'</span> <span class='hs-varid'>moduleParser</span> <span class='hs-varid'>file</span>
<a name="line-154"></a>
<a name="line-155"></a><span class='hs-comment'>-- | A variant of 'moduleName'' which raises an error if the file name</span>
<a name="line-156"></a><span class='hs-comment'>-- does not match the module name.</span>
<a name="line-157"></a><span class='hs-comment'>--</span>
<a name="line-158"></a><span class='hs-comment'>-- The file name is interpreted relative to the current working</span>
<a name="line-159"></a><span class='hs-comment'>-- directory (unless it is absolute).</span>
<a name="line-160"></a>
<a name="line-161"></a><a name="moduleName"></a><span class='hs-definition'>moduleName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>AbsolutePath</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>TopLevelModuleName</span>
<a name="line-162"></a><span class='hs-definition'>moduleName</span> <span class='hs-varid'>file</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-163"></a> <span class='hs-varid'>m</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>moduleName'</span> <span class='hs-varid'>file</span>
<a name="line-164"></a> <span class='hs-varid'>checkModuleName</span> <span class='hs-varid'>m</span> <span class='hs-varid'>file</span>
<a name="line-165"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>m</span>
<a name="line-166"></a>
<a name="line-167"></a><span class='hs-comment'>-- | Maps top-level module names to the corresponding source file</span>
<a name="line-168"></a><span class='hs-comment'>-- names.</span>
<a name="line-169"></a>
<a name="line-170"></a><a name="ModuleToSource"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>ModuleToSource</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Map</span> <span class='hs-conid'>TopLevelModuleName</span> <span class='hs-conid'>AbsolutePath</span>
<a name="line-171"></a>
<a name="line-172"></a><span class='hs-comment'>-- | Maps source file names to the corresponding top-level module</span>
<a name="line-173"></a><span class='hs-comment'>-- names.</span>
<a name="line-174"></a>
<a name="line-175"></a><a name="SourceToModule"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>SourceToModule</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Map</span> <span class='hs-conid'>AbsolutePath</span> <span class='hs-conid'>TopLevelModuleName</span>
<a name="line-176"></a>
<a name="line-177"></a><span class='hs-comment'>-- | Creates a 'SourceToModule' map based on 'stModuleToSource'.</span>
<a name="line-178"></a>
<a name="line-179"></a><a name="sourceToModule"></a><span class='hs-definition'>sourceToModule</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>SourceToModule</span>
<a name="line-180"></a><span class='hs-definition'>sourceToModule</span> <span class='hs-keyglyph'>=</span>
<a name="line-181"></a> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>fromList</span>
<a name="line-182"></a> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-183"></a> <span class='hs-varop'>.</span> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>toList</span>
<a name="line-184"></a> <span class='hs-varop'>.</span> <span class='hs-varid'>stModuleToSource</span>
<a name="line-185"></a> <span class='hs-varop'><$></span> <span class='hs-varid'>get</span>
</pre></body>
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