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<title>src/Language/Haskell/TH/LiftInstances.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE TemplateHaskell #-}</span>
<a name="line-2"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-3"></a><span class='hs-comment'>-- |</span>
<a name="line-4"></a><span class='hs-comment'>-- Module : Language.Haskell.TH.LiftInstances</span>
<a name="line-5"></a><span class='hs-comment'>-- Copyright : (c) SAM Group, KTH/ICT/ECS 2007-2008</span>
<a name="line-6"></a><span class='hs-comment'>-- License : BSD-style (see the file LICENSE)</span>
<a name="line-7"></a><span class='hs-comment'>-- </span>
<a name="line-8"></a><span class='hs-comment'>-- Maintainer : forsyde-dev@ict.kth.se</span>
<a name="line-9"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-10"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-11"></a><span class='hs-comment'>--</span>
<a name="line-12"></a><span class='hs-comment'>-- This module provides 'Lift' instances for all the AST-types defined</span>
<a name="line-13"></a><span class='hs-comment'>-- in "Language.Haskell.Syntax":</span>
<a name="line-14"></a><span class='hs-comment'>-- 'Guard' 'Strict', 'Callconv', 'Safety','Body', 'Con', 'FunDep', 'Foreign', </span>
<a name="line-15"></a><span class='hs-comment'>-- 'Lit', 'Pat', 'Match', 'Stmt', 'Range', 'Clause', 'Type', 'Dec', 'Exp'</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a><span class='hs-comment'>-- Furthermore it provides a 'Lift' instance of 'Ratio', 'Int8', 'Int16',</span>
<a name="line-18"></a><span class='hs-comment'>-- 'Int32', </span>
<a name="line-19"></a><span class='hs-comment'>-- (essential for some of the other instantiations) and a function (metaLift)</span>
<a name="line-20"></a><span class='hs-comment'>-- which lifts an expression twice, obtaing its meta AST (the AST of the AST)</span>
<a name="line-21"></a><span class='hs-comment'>-- </span>
<a name="line-22"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-23"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>TH</span><span class='hs-varop'>.</span><span class='hs-conid'>LiftInstances</span> <span class='hs-layout'>(</span><span class='hs-varid'>metaLift</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-24"></a>
<a name="line-25"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>TH</span><span class='hs-varop'>.</span><span class='hs-conid'>Lift</span> <span class='hs-layout'>(</span><span class='hs-varid'>deriveLift</span><span class='hs-layout'>)</span>
<a name="line-26"></a>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Language</span><span class='hs-varop'>.</span><span class='hs-conid'>Haskell</span><span class='hs-varop'>.</span><span class='hs-conid'>TH</span><span class='hs-varop'>.</span><span class='hs-conid'>Syntax</span>
<a name="line-28"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Guard</span><span class='hs-layout'>,</span>
<a name="line-29"></a> <span class='hs-conid'>Strict</span><span class='hs-layout'>,</span>
<a name="line-30"></a> <span class='hs-conid'>Callconv</span><span class='hs-layout'>,</span>
<a name="line-31"></a> <span class='hs-conid'>Safety</span><span class='hs-layout'>,</span>
<a name="line-32"></a> <span class='hs-conid'>Body</span><span class='hs-layout'>,</span>
<a name="line-33"></a> <span class='hs-conid'>Con</span><span class='hs-layout'>,</span>
<a name="line-34"></a> <span class='hs-conid'>FunDep</span><span class='hs-layout'>,</span>
<a name="line-35"></a> <span class='hs-conid'>Foreign</span><span class='hs-layout'>,</span>
<a name="line-36"></a> <span class='hs-conid'>Lit</span><span class='hs-layout'>(</span><span class='hs-conid'>IntegerL</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-37"></a> <span class='hs-conid'>Pat</span><span class='hs-layout'>,</span>
<a name="line-38"></a> <span class='hs-conid'>Match</span><span class='hs-layout'>,</span>
<a name="line-39"></a> <span class='hs-conid'>Stmt</span><span class='hs-layout'>,</span>
<a name="line-40"></a> <span class='hs-conid'>Range</span><span class='hs-layout'>,</span>
<a name="line-41"></a> <span class='hs-conid'>Clause</span><span class='hs-layout'>,</span>
<a name="line-42"></a> <span class='hs-conid'>Type</span><span class='hs-layout'>,</span>
<a name="line-43"></a> <span class='hs-conid'>Dec</span><span class='hs-layout'>,</span>
<a name="line-44"></a> <span class='hs-conid'>Exp</span><span class='hs-layout'>(</span><span class='hs-conid'>LitE</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-45"></a> <span class='hs-conid'>Q</span><span class='hs-layout'>,</span>
<a name="line-46"></a> <span class='hs-conid'>Lift</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-47"></a> <span class='hs-conid'>Pred</span><span class='hs-layout'>,</span>
<a name="line-48"></a> <span class='hs-conid'>TyVarBndr</span><span class='hs-layout'>,</span>
<a name="line-49"></a> <span class='hs-conid'>Kind</span><span class='hs-layout'>,</span>
<a name="line-50"></a> <span class='hs-conid'>FamFlavour</span><span class='hs-layout'>,</span>
<a name="line-51"></a> <span class='hs-conid'>Pragma</span><span class='hs-layout'>,</span>
<a name="line-52"></a> <span class='hs-conid'>InlineSpec</span><span class='hs-layout'>)</span>
<a name="line-53"></a>
<a name="line-54"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Ratio</span> <span class='hs-layout'>(</span><span class='hs-conid'>Ratio</span><span class='hs-layout'>)</span>
<a name="line-55"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Int</span> <span class='hs-layout'>(</span><span class='hs-conid'>Int8</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int16</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int32</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int64</span><span class='hs-layout'>)</span>
<a name="line-56"></a>
<a name="line-57"></a><span class='hs-varop'>$</span><span class='hs-layout'>(</span><span class='hs-varid'>mapM</span> <span class='hs-varid'>deriveLift</span>
<a name="line-58"></a> <span class='hs-keyglyph'>[</span><span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Ratio</span><span class='hs-layout'>,</span>
<a name="line-59"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Guard</span><span class='hs-layout'>,</span>
<a name="line-60"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Strict</span><span class='hs-layout'>,</span>
<a name="line-61"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Callconv</span><span class='hs-layout'>,</span>
<a name="line-62"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Safety</span><span class='hs-layout'>,</span>
<a name="line-63"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Body</span><span class='hs-layout'>,</span>
<a name="line-64"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Con</span><span class='hs-layout'>,</span>
<a name="line-65"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>FunDep</span><span class='hs-layout'>,</span>
<a name="line-66"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Foreign</span><span class='hs-layout'>,</span>
<a name="line-67"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Lit</span><span class='hs-layout'>,</span>
<a name="line-68"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Pat</span><span class='hs-layout'>,</span>
<a name="line-69"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Match</span><span class='hs-layout'>,</span>
<a name="line-70"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Stmt</span><span class='hs-layout'>,</span>
<a name="line-71"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Range</span><span class='hs-layout'>,</span>
<a name="line-72"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Clause</span><span class='hs-layout'>,</span>
<a name="line-73"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Type</span><span class='hs-layout'>,</span>
<a name="line-74"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Dec</span><span class='hs-layout'>,</span>
<a name="line-75"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Exp</span><span class='hs-layout'>,</span>
<a name="line-76"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Pred</span><span class='hs-layout'>,</span>
<a name="line-77"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>TyVarBndr</span><span class='hs-layout'>,</span>
<a name="line-78"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Kind</span><span class='hs-layout'>,</span>
<a name="line-79"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>FamFlavour</span><span class='hs-layout'>,</span>
<a name="line-80"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Pragma</span><span class='hs-layout'>,</span>
<a name="line-81"></a> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>InlineSpec</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-82"></a>
<a name="line-83"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Lift</span> <span class='hs-conid'>Int64</span> <span class='hs-keyword'>where</span>
<a name="line-84"></a> <span class='hs-varid'>lift</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>LitE</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntegerL</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-85"></a>
<a name="line-86"></a>
<a name="line-87"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Lift</span> <span class='hs-conid'>Int32</span> <span class='hs-keyword'>where</span>
<a name="line-88"></a> <span class='hs-varid'>lift</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>LitE</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntegerL</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-89"></a>
<a name="line-90"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Lift</span> <span class='hs-conid'>Int16</span> <span class='hs-keyword'>where</span>
<a name="line-91"></a> <span class='hs-varid'>lift</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>LitE</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntegerL</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-92"></a>
<a name="line-93"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Lift</span> <span class='hs-conid'>Int8</span> <span class='hs-keyword'>where</span>
<a name="line-94"></a> <span class='hs-varid'>lift</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>LitE</span> <span class='hs-layout'>(</span><span class='hs-conid'>IntegerL</span> <span class='hs-layout'>(</span><span class='hs-varid'>fromIntegral</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-95"></a>
<a name="line-96"></a>
<a name="line-97"></a><a name="metaLift"></a><span class='hs-comment'>-- | lift twice, getting the meta AST (the AST of the AST)</span>
<a name="line-98"></a><span class='hs-definition'>metaLift</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Lift</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Q</span> <span class='hs-conid'>Exp</span>
<a name="line-99"></a><span class='hs-definition'>metaLift</span> <span class='hs-varid'>exp</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>expAST</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>lift</span> <span class='hs-varid'>exp</span>
<a name="line-100"></a> <span class='hs-varid'>lift</span> <span class='hs-varid'>expAST</span>
<a name="line-101"></a>
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