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<title>src/full/Agda/TypeChecking/Monad/Imports.hs</title>
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<pre><a name="line-1"></a>
<a name="line-2"></a><span class='hs-keyword'>module</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'>Imports</span> <span class='hs-keyword'>where</span>
<a name="line-3"></a>
<a name="line-4"></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>
<a name="line-5"></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'>Reader</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span>
<a name="line-8"></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-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Set</span> <span class='hs-layout'>(</span><span class='hs-conid'>Set</span><span class='hs-layout'>)</span>
<a name="line-10"></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-11"></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'>List</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>List</span>
<a name="line-12"></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'>Set</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>Set</span>
<a name="line-13"></a>
<a name="line-14"></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'>Abstract</span><span class='hs-varop'>.</span><span class='hs-conid'>Name</span>
<a name="line-15"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</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><span class='hs-varop'>.</span><span class='hs-conid'>Name</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>C</span>
<a name="line-16"></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-17"></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'>Monad</span>
<a name="line-18"></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'>Time</span>
<a name="line-19"></a>
<a name="line-20"></a><a name="addImport"></a><span class='hs-definition'>addImport</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>()</span>
<a name="line-21"></a><span class='hs-definition'>addImport</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-22"></a> <span class='hs-varid'>modify</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-layout'>{</span> <span class='hs-varid'>stImportedModules</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Set</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-varid'>m</span> <span class='hs-varop'>$</span> <span class='hs-varid'>stImportedModules</span> <span class='hs-varid'>s</span> <span class='hs-layout'>}</span>
<a name="line-23"></a>
<a name="line-24"></a><a name="addImportCycleCheck"></a><span class='hs-definition'>addImportCycleCheck</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>TopLevelModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span>
<a name="line-25"></a><span class='hs-definition'>addImportCycleCheck</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span>
<a name="line-26"></a> <span class='hs-varid'>local</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span> <span class='hs-layout'>{</span> <span class='hs-varid'>envImportPath</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span> <span class='hs-conop'>:</span> <span class='hs-varid'>envImportPath</span> <span class='hs-varid'>e</span> <span class='hs-layout'>}</span>
<a name="line-27"></a>
<a name="line-28"></a><a name="getImports"></a><span class='hs-definition'>getImports</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Set</span> <span class='hs-conid'>ModuleName</span><span class='hs-layout'>)</span>
<a name="line-29"></a><span class='hs-definition'>getImports</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gets</span> <span class='hs-varid'>stImportedModules</span>
<a name="line-30"></a>
<a name="line-31"></a><a name="isImported"></a><span class='hs-definition'>isImported</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Bool</span>
<a name="line-32"></a><span class='hs-definition'>isImported</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Set</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span> <span class='hs-varid'>m</span> <span class='hs-varop'><$></span> <span class='hs-varid'>getImports</span>
<a name="line-33"></a>
<a name="line-34"></a><a name="getImportPath"></a><span class='hs-definition'>getImportPath</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TCM</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>TopLevelModuleName</span><span class='hs-keyglyph'>]</span>
<a name="line-35"></a><span class='hs-definition'>getImportPath</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>asks</span> <span class='hs-varid'>envImportPath</span>
<a name="line-36"></a>
<a name="line-37"></a><a name="visitModule"></a><span class='hs-definition'>visitModule</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ModuleInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>()</span>
<a name="line-38"></a><span class='hs-definition'>visitModule</span> <span class='hs-varid'>mi</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>modify</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span>
<a name="line-39"></a> <span class='hs-varid'>s</span> <span class='hs-layout'>{</span> <span class='hs-varid'>stVisitedModules</span> <span class='hs-keyglyph'>=</span>
<a name="line-40"></a> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-layout'>(</span><span class='hs-varid'>toTopLevelModuleName</span> <span class='hs-varop'>$</span> <span class='hs-varid'>iModuleName</span> <span class='hs-varop'>$</span> <span class='hs-varid'>miInterface</span> <span class='hs-varid'>mi</span><span class='hs-layout'>)</span>
<a name="line-41"></a> <span class='hs-varid'>mi</span> <span class='hs-varop'>$</span>
<a name="line-42"></a> <span class='hs-varid'>stVisitedModules</span> <span class='hs-varid'>s</span> <span class='hs-layout'>}</span>
<a name="line-43"></a>
<a name="line-44"></a><a name="setVisitedModules"></a><span class='hs-definition'>setVisitedModules</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>VisitedModules</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>()</span>
<a name="line-45"></a><span class='hs-definition'>setVisitedModules</span> <span class='hs-varid'>ms</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>modify</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>s</span> <span class='hs-layout'>{</span> <span class='hs-varid'>stVisitedModules</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ms</span> <span class='hs-layout'>}</span>
<a name="line-46"></a>
<a name="line-47"></a><a name="getVisitedModules"></a><span class='hs-definition'>getVisitedModules</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>VisitedModules</span>
<a name="line-48"></a><span class='hs-definition'>getVisitedModules</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gets</span> <span class='hs-varid'>stVisitedModules</span>
<a name="line-49"></a>
<a name="line-50"></a><a name="isVisited"></a><span class='hs-definition'>isVisited</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>TopLevelModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>Bool</span>
<a name="line-51"></a><span class='hs-definition'>isVisited</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gets</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>member</span> <span class='hs-varid'>x</span> <span class='hs-varop'>.</span> <span class='hs-varid'>stVisitedModules</span>
<a name="line-52"></a>
<a name="line-53"></a><a name="getVisitedModule"></a><span class='hs-definition'>getVisitedModule</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>TopLevelModuleName</span>
<a name="line-54"></a> <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'>ModuleInfo</span><span class='hs-layout'>)</span>
<a name="line-55"></a><span class='hs-definition'>getVisitedModule</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>gets</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>x</span> <span class='hs-varop'>.</span> <span class='hs-varid'>stVisitedModules</span>
<a name="line-56"></a>
<a name="line-57"></a><a name="getDecodedModules"></a><span class='hs-definition'>getDecodedModules</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>DecodedModules</span>
<a name="line-58"></a><span class='hs-definition'>getDecodedModules</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>stDecodedModules</span> <span class='hs-varop'>.</span> <span class='hs-varid'>stPersistent</span> <span class='hs-varop'><$></span> <span class='hs-varid'>get</span>
<a name="line-59"></a>
<a name="line-60"></a><a name="setDecodedModules"></a><span class='hs-definition'>setDecodedModules</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>DecodedModules</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>()</span>
<a name="line-61"></a><span class='hs-definition'>setDecodedModules</span> <span class='hs-varid'>ms</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>modify</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span>
<a name="line-62"></a> <span class='hs-varid'>s</span> <span class='hs-layout'>{</span> <span class='hs-varid'>stPersistent</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>stPersistent</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>{</span> <span class='hs-varid'>stDecodedModules</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>ms</span> <span class='hs-layout'>}</span> <span class='hs-layout'>}</span>
<a name="line-63"></a>
<a name="line-64"></a><a name="getDecodedModule"></a><span class='hs-definition'>getDecodedModule</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>TopLevelModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Interface</span><span class='hs-layout'>,</span> <span class='hs-conid'>ClockTime</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-65"></a><span class='hs-definition'>getDecodedModule</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>lookup</span> <span class='hs-varid'>x</span> <span class='hs-varop'>.</span> <span class='hs-varid'>stDecodedModules</span> <span class='hs-varop'>.</span> <span class='hs-varid'>stPersistent</span> <span class='hs-varop'><$></span> <span class='hs-varid'>get</span>
<a name="line-66"></a>
<a name="line-67"></a><a name="storeDecodedModule"></a><span class='hs-definition'>storeDecodedModule</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Interface</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ClockTime</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>()</span>
<a name="line-68"></a><span class='hs-definition'>storeDecodedModule</span> <span class='hs-varid'>i</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>modify</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span>
<a name="line-69"></a> <span class='hs-varid'>s</span> <span class='hs-layout'>{</span> <span class='hs-varid'>stPersistent</span> <span class='hs-keyglyph'>=</span>
<a name="line-70"></a> <span class='hs-layout'>(</span><span class='hs-varid'>stPersistent</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>{</span> <span class='hs-varid'>stDecodedModules</span> <span class='hs-keyglyph'>=</span>
<a name="line-71"></a> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>insert</span> <span class='hs-layout'>(</span><span class='hs-varid'>toTopLevelModuleName</span> <span class='hs-varop'>$</span> <span class='hs-varid'>iModuleName</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-varid'>t</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span>
<a name="line-72"></a> <span class='hs-layout'>(</span><span class='hs-varid'>stDecodedModules</span> <span class='hs-varop'>$</span> <span class='hs-varid'>stPersistent</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-73"></a> <span class='hs-layout'>}</span>
<a name="line-74"></a> <span class='hs-layout'>}</span>
<a name="line-75"></a>
<a name="line-76"></a><a name="dropDecodedModule"></a><span class='hs-definition'>dropDecodedModule</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>TopLevelModuleName</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>()</span>
<a name="line-77"></a><span class='hs-definition'>dropDecodedModule</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>modify</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span>
<a name="line-78"></a> <span class='hs-varid'>s</span> <span class='hs-layout'>{</span> <span class='hs-varid'>stPersistent</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>stPersistent</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>{</span> <span class='hs-varid'>stDecodedModules</span> <span class='hs-keyglyph'>=</span>
<a name="line-79"></a> <span class='hs-conid'>Map</span><span class='hs-varop'>.</span><span class='hs-varid'>delete</span> <span class='hs-varid'>x</span> <span class='hs-varop'>$</span> <span class='hs-varid'>stDecodedModules</span> <span class='hs-varop'>$</span> <span class='hs-varid'>stPersistent</span> <span class='hs-varid'>s</span>
<a name="line-80"></a> <span class='hs-layout'>}</span>
<a name="line-81"></a> <span class='hs-layout'>}</span>
<a name="line-82"></a>
<a name="line-83"></a><a name="withImportPath"></a><span class='hs-definition'>withImportPath</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>C</span><span class='hs-varop'>.</span><span class='hs-conid'>TopLevelModuleName</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TCM</span> <span class='hs-varid'>a</span>
<a name="line-84"></a><span class='hs-definition'>withImportPath</span> <span class='hs-varid'>path</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>local</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>e</span> <span class='hs-layout'>{</span> <span class='hs-varid'>envImportPath</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>path</span> <span class='hs-layout'>}</span>
<a name="line-85"></a>
<a name="line-86"></a><a name="checkForImportCycle"></a><span class='hs-comment'>-- | Assumes that the first module in the import path is the module we are</span>
<a name="line-87"></a><span class='hs-comment'>-- worried about.</span>
<a name="line-88"></a><span class='hs-definition'>checkForImportCycle</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TCM</span> <span class='hs-conid'>()</span>
<a name="line-89"></a><span class='hs-definition'>checkForImportCycle</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-90"></a> <span class='hs-varid'>m</span><span class='hs-conop'>:</span><span class='hs-varid'>ms</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getImportPath</span>
<a name="line-91"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>ms</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>typeError</span> <span class='hs-varop'>$</span> <span class='hs-conid'>CyclicModuleDependency</span>
<a name="line-92"></a> <span class='hs-varop'>$</span> <span class='hs-varid'>dropWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reverse</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span><span class='hs-conop'>:</span><span class='hs-varid'>ms</span><span class='hs-layout'>)</span>
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