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<title>src/full/Agda/Interaction/Monad.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE TypeSynonymInstances, FlexibleInstances,
<a name="line-2"></a> MultiParamTypeClasses #-}</span>
<a name="line-3"></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'>Monad</span> <span class='hs-keyword'>where</span>
<a name="line-4"></a>
<a name="line-5"></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>
<a name="line-6"></a>
<a name="line-7"></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-8"></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'>Error</span>
<a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Console</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskeline</span>
<a name="line-10"></a>
<a name="line-11"></a><span class='hs-comment'>-- | Interaction monad.</span>
<a name="line-12"></a>
<a name="line-13"></a><a name="IM"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>IM</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TCMT</span> <span class='hs-layout'>(</span><span class='hs-conid'>InputT</span> <span class='hs-conid'>IO</span><span class='hs-layout'>)</span>
<a name="line-14"></a>
<a name="line-15"></a><a name="instance%20MonadError%20TCErr%20IM"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>MonadError</span> <span class='hs-conid'>TCErr</span> <span class='hs-conid'>IM</span> <span class='hs-keyword'>where</span>
<a name="line-16"></a> <span class='hs-varid'>throwError</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>.</span> <span class='hs-varid'>throwIO</span>
<a name="line-17"></a> <span class='hs-varid'>catchError</span> <span class='hs-varid'>m</span> <span class='hs-varid'>h</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapTCMT</span> <span class='hs-varid'>liftIO</span> <span class='hs-varop'>$</span> <span class='hs-varid'>runIM</span> <span class='hs-varid'>m</span> <span class='hs-varop'>`catchError`</span> <span class='hs-layout'>(</span><span class='hs-varid'>runIM</span> <span class='hs-varop'>.</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span>
<a name="line-18"></a>
<a name="line-19"></a><span class='hs-comment'>-- | Line reader. The line reader history is not stored between</span>
<a name="line-20"></a><span class='hs-comment'>-- sessions.</span>
<a name="line-21"></a>
<a name="line-22"></a><a name="readline"></a><span class='hs-definition'>readline</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IM</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>String</span><span class='hs-layout'>)</span>
<a name="line-23"></a><span class='hs-definition'>readline</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lift</span> <span class='hs-layout'>(</span><span class='hs-varid'>getInputLine</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span>
<a name="line-24"></a>
<a name="line-25"></a><a name="runIM"></a><span class='hs-definition'>runIM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>IM</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-26"></a><span class='hs-definition'>runIM</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mapTCMT</span> <span class='hs-layout'>(</span><span class='hs-varid'>runInputT</span> <span class='hs-varid'>defaultSettings</span><span class='hs-layout'>)</span>
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