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<title>src/ForSyDe/System/SysFun.hs</title>
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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE TemplateHaskell, ScopedTypeVariables, MultiParamTypeClasses,
<a name="line-2"></a> FunctionalDependencies #-}</span>
<a name="line-3"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-4"></a><span class='hs-comment'>-- |</span>
<a name="line-5"></a><span class='hs-comment'>-- Module : ForSyDe.System.SysFun</span>
<a name="line-6"></a><span class='hs-comment'>-- Copyright : (c) SAM Group, KTH/ICT/ECS 2007-2008</span>
<a name="line-7"></a><span class='hs-comment'>-- License : BSD-style (see the file LICENSE)</span>
<a name="line-8"></a><span class='hs-comment'>-- </span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : forsyde-dev@ict.kth.se</span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- This module provides the 'SysFun' class and a Template Haskell </span>
<a name="line-14"></a><span class='hs-comment'>-- function to check whether a 'Type' complies with the expected </span>
<a name="line-15"></a><span class='hs-comment'>-- type of a system function not.</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a><span class='hs-comment'>----------------------------------------------------------------------------- </span>
<a name="line-18"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>ForSyDe</span><span class='hs-varop'>.</span><span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>SysFun</span>
<a name="line-19"></a> <span class='hs-layout'>(</span><span class='hs-conid'>SysFun</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-20"></a> <span class='hs-conid'>SysFunToSimFun</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-21"></a> <span class='hs-conid'>SysFunToIOSimFun</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-22"></a> <span class='hs-varid'>funOutInstances</span><span class='hs-layout'>,</span>
<a name="line-23"></a> <span class='hs-varid'>checkSysFType</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'>ForSyDe</span><span class='hs-varop'>.</span><span class='hs-conid'>Ids</span><span class='hs-layout'>(</span><span class='hs-conid'>PortId</span><span class='hs-layout'>)</span>
<a name="line-26"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>ForSyDe</span><span class='hs-varop'>.</span><span class='hs-conid'>Netlist</span> <span class='hs-layout'>(</span><span class='hs-conid'>NlSignal</span><span class='hs-layout'>,</span> <span class='hs-conid'>Signal</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-27"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>ForSyDe</span><span class='hs-varop'>.</span><span class='hs-conid'>ForSyDeErr</span>
<a name="line-28"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>ForSyDe</span><span class='hs-varop'>.</span><span class='hs-conid'>Process</span><span class='hs-varop'>.</span><span class='hs-conid'>ProcType</span> <span class='hs-layout'>(</span><span class='hs-conid'>ProcType</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-29"></a>
<a name="line-30"></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'>TypeLib</span>
<a name="line-31"></a>
<a name="line-32"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Dynamic</span>
<a name="line-33"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Regex</span><span class='hs-varop'>.</span><span class='hs-conid'>Posix</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>=~</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-34"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</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-keyword'>as</span> <span class='hs-conid'>TH</span> <span class='hs-layout'>(</span><span class='hs-conid'>Exp</span><span class='hs-layout'>)</span>
<a name="line-35"></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>
<a name="line-36"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>ParserCombinators</span><span class='hs-varop'>.</span><span class='hs-conid'>ReadP</span> <span class='hs-layout'>(</span><span class='hs-varid'>readP_to_S</span><span class='hs-layout'>)</span>
<a name="line-37"></a>
<a name="line-38"></a>
<a name="line-39"></a><span class='hs-comment'>---------------</span>
<a name="line-40"></a><span class='hs-comment'>-- SysFun class</span>
<a name="line-41"></a><span class='hs-comment'>---------------</span>
<a name="line-42"></a>
<a name="line-43"></a><a name="SysFunToSimFun"></a><span class='hs-comment'>-- | Class used to describe a System function. It uses the same trick</span>
<a name="line-44"></a><a name="SysFunToSimFun"></a><span class='hs-comment'>-- as 'Text.Printf' to implement the variable number of arguments.</span>
<a name="line-45"></a><a name="SysFunToSimFun"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>SysFun</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>where</span>
<a name="line-46"></a> <span class='hs-comment'>-- | Gets the result of applying a system function to input port signals</span>
<a name="line-47"></a> <span class='hs-comment'>-- whose name is given in first argument.</span>
<a name="line-48"></a> <span class='hs-comment'>-- In case the input id list is not long enough, \"default\" will be used</span>
<a name="line-49"></a> <span class='hs-comment'>-- as the id of the remaining ports.</span>
<a name="line-50"></a> <span class='hs-varid'>applySysFun</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>f</span>
<a name="line-51"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>PortId</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ ids used to build the input ports</span>
<a name="line-52"></a> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>NlSignal</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>TypeRep</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>TypeRep</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-53"></a> <span class='hs-comment'>-- ^ (output signals returned by the system function,</span>
<a name="line-54"></a> <span class='hs-comment'>-- types of input ports, </span>
<a name="line-55"></a> <span class='hs-comment'>-- types of output ports)</span>
<a name="line-56"></a>
<a name="line-57"></a> <span class='hs-comment'>-- | Transforms a primitive-signal-list version of a system function</span>
<a name="line-58"></a> <span class='hs-comment'>-- into a standard system function.</span>
<a name="line-59"></a> <span class='hs-comment'>-- Note the length of input/output lists of the list version must match with </span>
<a name="line-60"></a> <span class='hs-comment'>-- the argument number and return tuple size of the system function.</span>
<a name="line-61"></a> <span class='hs-varid'>fromListSysFun</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>NlSignal</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>NlSignal</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ primitive-signal-list sysfun</span>
<a name="line-62"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>NlSignal</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ accumulated primitive signals</span>
<a name="line-63"></a> <span class='hs-comment'>-- (must be initialized to [])</span>
<a name="line-64"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span>
<a name="line-65"></a>
<a name="line-66"></a>
<a name="line-67"></a>
<a name="line-68"></a><span class='hs-comment'>-----------------------</span>
<a name="line-69"></a><span class='hs-comment'>-- SysFunToSimFun class</span>
<a name="line-70"></a><span class='hs-comment'>-----------------------</span>
<a name="line-71"></a>
<a name="line-72"></a><a name="SysFunToSimFun"></a><span class='hs-comment'>-- | Multiparameter class to transform a System Function into a Simulation </span>
<a name="line-73"></a><a name="SysFunToSimFun"></a><span class='hs-comment'>-- Function, able to simulate a System using a list-based representation </span>
<a name="line-74"></a><a name="SysFunToSimFun"></a><span class='hs-comment'>-- of its signals.</span>
<a name="line-75"></a><a name="SysFunToSimFun"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>SysFun</span> <span class='hs-varid'>sysFun</span> <span class='hs-keyglyph'>=></span>
<a name="line-76"></a> <span class='hs-conid'>SysFunToSimFun</span> <span class='hs-varid'>sysFun</span> <span class='hs-varid'>simFun</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>sysFun</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>simFun</span><span class='hs-layout'>,</span> <span class='hs-varid'>simFun</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>sysFun</span> <span class='hs-keyword'>where</span>
<a name="line-77"></a> <span class='hs-comment'>-- | Transforms a dynamic-list version of a simulation function</span>
<a name="line-78"></a> <span class='hs-comment'>-- into a standard simulation function.</span>
<a name="line-79"></a> <span class='hs-comment'>-- Note the length of input/output lists of the list version must match with </span>
<a name="line-80"></a> <span class='hs-comment'>-- the argument number and return tuple size of the simulation function.</span>
<a name="line-81"></a> <span class='hs-varid'>fromDynSimFun</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Dynamic</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Dynamic</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ dynamic-list simfun</span>
<a name="line-82"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Dynamic</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ accumulated dynamic values</span>
<a name="line-83"></a> <span class='hs-comment'>-- (must be initialized to [])</span>
<a name="line-84"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>simFun</span>
<a name="line-85"></a>
<a name="line-86"></a><span class='hs-comment'>-------------------------</span>
<a name="line-87"></a><span class='hs-comment'>-- SysFunToIOSimFun class</span>
<a name="line-88"></a><span class='hs-comment'>-------------------------</span>
<a name="line-89"></a>
<a name="line-90"></a><a name="SysFunToIOSimFun"></a><span class='hs-comment'>-- | Multiparameter class to transform a System Function into an IO </span>
<a name="line-91"></a><a name="SysFunToIOSimFun"></a><span class='hs-comment'>-- Simulation Function, able to externally simulate a System using a </span>
<a name="line-92"></a><a name="SysFunToIOSimFun"></a><span class='hs-comment'>-- list-based representation of its signals.</span>
<a name="line-93"></a><a name="SysFunToIOSimFun"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>SysFun</span> <span class='hs-varid'>sysFun</span> <span class='hs-keyglyph'>=></span>
<a name="line-94"></a> <span class='hs-conid'>SysFunToIOSimFun</span> <span class='hs-varid'>sysFun</span> <span class='hs-varid'>simFun</span> <span class='hs-keyglyph'>|</span>
<a name="line-95"></a> <span class='hs-varid'>sysFun</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>simFun</span><span class='hs-layout'>,</span> <span class='hs-varid'>simFun</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>sysFun</span> <span class='hs-keyword'>where</span>
<a name="line-96"></a> <span class='hs-comment'>-- | Transforms a TH/String version of a simulation function into a</span>
<a name="line-97"></a> <span class='hs-comment'>-- standard simulation function. </span>
<a name="line-98"></a> <span class='hs-comment'>-- Again, the length of input/output lists of the list version must</span>
<a name="line-99"></a> <span class='hs-comment'>-- match with the argument number and return tuple size of the</span>
<a name="line-100"></a> <span class='hs-comment'>-- simulation function.</span>
<a name="line-101"></a> <span class='hs-varid'>fromTHStrSimFun</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>TH</span><span class='hs-varop'>.</span><span class='hs-conid'>Exp</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</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-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ TH/String-list simfun</span>
<a name="line-102"></a> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>TH</span><span class='hs-varop'>.</span><span class='hs-conid'>Exp</span><span class='hs-keyglyph'>]</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ accumulated dynamic values</span>
<a name="line-103"></a> <span class='hs-comment'>-- (must be initialized to [])</span>
<a name="line-104"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>simFun</span>
<a name="line-105"></a>
<a name="line-106"></a><a name="funOutInstances"></a><span class='hs-comment'>-- Function to automatically generate instances for the system and</span>
<a name="line-107"></a><span class='hs-comment'>-- simulate function outputs with Template Haskell. For example, in</span>
<a name="line-108"></a><span class='hs-comment'>-- the case of 2 outputs, the code generated would be:</span>
<a name="line-109"></a><span class='hs-comment'>--</span>
<a name="line-110"></a><span class='hs-comment'>-- @</span>
<a name="line-111"></a><span class='hs-comment'>-- NOTE: even if all ProcType constraints could be less restrictive (Typeable</span>
<a name="line-112"></a><span class='hs-comment'>-- would do), it makes more sense, and who nows, maybe we end up requiring</span>
<a name="line-113"></a><span class='hs-comment'>-- full ProcType functionality at some point. </span>
<a name="line-114"></a><span class='hs-comment'>--</span>
<a name="line-115"></a><span class='hs-comment'>--</span>
<a name="line-116"></a><span class='hs-comment'>-- instance (ProcType o1, ProcType o2) => SysFun (Signal o1, Signal o2) where</span>
<a name="line-117"></a><span class='hs-comment'>-- applyFun (o1, o2) _ = </span>
<a name="line-118"></a><span class='hs-comment'>-- ([unSignal o1, unSignal o2], [], [typeOf o1, typeOf o2]) </span>
<a name="line-119"></a><span class='hs-comment'>-- fromListSysFun f accum = (Signal o1, Signal o2)</span>
<a name="line-120"></a><span class='hs-comment'>-- where [o1, o2] = f (reverse accum) </span>
<a name="line-121"></a><span class='hs-comment'>--</span>
<a name="line-122"></a><span class='hs-comment'>-- instance (ProcType o1, ProcType o2) => </span>
<a name="line-123"></a><span class='hs-comment'>-- SysFun2SimFun (Signal o1, Signal o2) ([o1], [o2]) where</span>
<a name="line-124"></a><span class='hs-comment'>-- fromDynSimFun f accum = (map unsafeFromDyn o1, map unsafeFromDyn o2)</span>
<a name="line-125"></a><span class='hs-comment'>-- -- use pattern (o1:o2:_) and not not [o1,o2]</span>
<a name="line-126"></a><span class='hs-comment'>-- -- because the second one doesn't when o1 and o2 are infinite lists</span>
<a name="line-127"></a><span class='hs-comment'>-- where (o1:o2:_) = f (reverse accum) </span>
<a name="line-128"></a><span class='hs-comment'>--</span>
<a name="line-129"></a><span class='hs-comment'>-- instance (ProcType o1, ProcType o2) => </span>
<a name="line-130"></a><span class='hs-comment'>-- SysFun2SimFun (Signal o1, Signal o2) (IO ([o1], [o2])) where</span>
<a name="line-131"></a><span class='hs-comment'>-- fromTHStrSimFun f accum = do</span>
<a name="line-132"></a><span class='hs-comment'>-- [o1, o2] <- f (reverse accum)</span>
<a name="line-133"></a><span class='hs-comment'>-- return (map parseProcType o1, map parseProcType o2) </span>
<a name="line-134"></a><span class='hs-comment'>--</span>
<a name="line-135"></a><span class='hs-comment'>--</span>
<a name="line-136"></a><span class='hs-comment'>-- @</span>
<a name="line-137"></a><span class='hs-definition'>funOutInstances</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- ^ number of outputs to generate</span>
<a name="line-138"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Q</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dec</span><span class='hs-layout'>,</span> <span class='hs-conid'>Dec</span><span class='hs-layout'>,</span> <span class='hs-conid'>Dec</span><span class='hs-layout'>)</span>
<a name="line-139"></a><span class='hs-definition'>funOutInstances</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-140"></a> <span class='hs-comment'>-- Generate N output names</span>
<a name="line-141"></a> <span class='hs-varid'>outNames</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>replicateM</span> <span class='hs-varid'>n</span> <span class='hs-layout'>(</span><span class='hs-varid'>newName</span> <span class='hs-str'>"o"</span><span class='hs-layout'>)</span>
<a name="line-142"></a>
<a name="line-143"></a> <span class='hs-comment'>-- 1) Generate applyFun</span>
<a name="line-144"></a> <span class='hs-comment'>-- Generate an input tuple pattern for applyFun</span>
<a name="line-145"></a> <span class='hs-comment'>-- (o1, o2, ..., on)</span>
<a name="line-146"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>tupPatApply</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tupP</span> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>varP</span> <span class='hs-varid'>outNames</span><span class='hs-layout'>)</span>
<a name="line-147"></a> <span class='hs-comment'>-- Generate the output primitive signal list expression for applyFun</span>
<a name="line-148"></a> <span class='hs-comment'>-- [unsignal o1, unsignal o2, ...., unsignal on]</span>
<a name="line-149"></a> <span class='hs-varid'>outPrimSignalsApply</span> <span class='hs-keyglyph'>=</span>
<a name="line-150"></a> <span class='hs-varid'>listE</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>oName</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>varE</span> <span class='hs-chr'>'</span><span class='hs-varid'>unSignal</span> <span class='hs-varop'>`appE`</span> <span class='hs-varid'>varE</span> <span class='hs-varid'>oName</span><span class='hs-layout'>)</span> <span class='hs-varid'>outNames</span>
<a name="line-151"></a> <span class='hs-comment'>-- Generate the output signal types for ApplyFun</span>
<a name="line-152"></a> <span class='hs-comment'>-- [typeOf o1, typeOf o2, ...., typeOf on]</span>
<a name="line-153"></a> <span class='hs-varid'>outTypeRepsApply</span> <span class='hs-keyglyph'>=</span>
<a name="line-154"></a> <span class='hs-varid'>listE</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>oName</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>varE</span> <span class='hs-chr'>'</span><span class='hs-varid'>typeOf</span> <span class='hs-varop'>`appE`</span> <span class='hs-varid'>varE</span> <span class='hs-varid'>oName</span><span class='hs-layout'>)</span> <span class='hs-varid'>outNames</span>
<a name="line-155"></a> <span class='hs-comment'>-- Generate the full output expression</span>
<a name="line-156"></a> <span class='hs-varid'>outEApply</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>|</span> <span class='hs-layout'>(</span><span class='hs-varop'>$</span><span class='hs-varid'>outPrimSignalsApply</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>,</span> <span class='hs-varop'>$</span><span class='hs-varid'>outTypeRepsApply</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span><span class='hs-keyglyph'>]</span>
<a name="line-157"></a> <span class='hs-comment'>-- Finally, the full declaration of applyFun </span>
<a name="line-158"></a> <span class='hs-varid'>applySysFunDec</span> <span class='hs-keyglyph'>=</span>
<a name="line-159"></a> <span class='hs-varid'>funD</span> <span class='hs-chr'>'</span><span class='hs-varid'>applySysFun</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>clause</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>tupPatApply</span><span class='hs-layout'>,</span> <span class='hs-varid'>wildP</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>(</span><span class='hs-varid'>normalB</span> <span class='hs-varid'>outEApply</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span><span class='hs-keyglyph'>]</span>
<a name="line-160"></a> <span class='hs-comment'>-- 2) Generate fromListSysFun</span>
<a name="line-161"></a> <span class='hs-comment'>-- Generate the parameter names</span>
<a name="line-162"></a> <span class='hs-varid'>fParFromSys</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newName</span> <span class='hs-str'>"f"</span>
<a name="line-163"></a> <span class='hs-varid'>accumParFromSys</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>newName</span> <span class='hs-str'>"accum"</span>
<a name="line-164"></a> <span class='hs-comment'>-- Generate the parameter patterns</span>
<a name="line-165"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>fPatFromSys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>varP</span> <span class='hs-varid'>fParFromSys</span>
<a name="line-166"></a> <span class='hs-varid'>accumPatFromSys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>varP</span> <span class='hs-varid'>accumParFromSys</span>
<a name="line-167"></a> <span class='hs-comment'>-- Generate the list pattern: [o1, o2, .., on]</span>
<a name="line-168"></a> <span class='hs-varid'>listPatFromSys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>listP</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>varP</span> <span class='hs-varid'>outNames</span>
<a name="line-169"></a> <span class='hs-comment'>-- Generate the rhs of the where declaration</span>
<a name="line-170"></a> <span class='hs-varid'>whereRHSFromSys</span> <span class='hs-keyglyph'>=</span>
<a name="line-171"></a> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>|</span> <span class='hs-varop'>$</span><span class='hs-layout'>(</span><span class='hs-varid'>varE</span> <span class='hs-varid'>fParFromSys</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varop'>$</span><span class='hs-layout'>(</span><span class='hs-varid'>varE</span> <span class='hs-varid'>accumParFromSys</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span><span class='hs-keyglyph'>]</span>
<a name="line-172"></a> <span class='hs-comment'>-- Generate the where clause declaration</span>
<a name="line-173"></a> <span class='hs-varid'>whereDecFromSys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>valD</span> <span class='hs-varid'>listPatFromSys</span> <span class='hs-layout'>(</span><span class='hs-varid'>normalB</span> <span class='hs-varid'>whereRHSFromSys</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span>
<a name="line-174"></a> <span class='hs-comment'>-- Generate output expression: (Signal o1, Signal o2, ..., Signal on)</span>
<a name="line-175"></a> <span class='hs-varid'>outEFromSys</span> <span class='hs-keyglyph'>=</span>
<a name="line-176"></a> <span class='hs-varid'>tupE</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>oName</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>conE</span> <span class='hs-chr'>'</span><span class='hs-conid'>Signal</span> <span class='hs-varop'>`appE`</span> <span class='hs-varid'>varE</span> <span class='hs-varid'>oName</span><span class='hs-layout'>)</span> <span class='hs-varid'>outNames</span>
<a name="line-177"></a> <span class='hs-comment'>-- Finally, the full declaration of fromListSysFun</span>
<a name="line-178"></a> <span class='hs-varid'>fromListSysFunDec</span> <span class='hs-keyglyph'>=</span>
<a name="line-179"></a> <span class='hs-varid'>funD</span> <span class='hs-chr'>'</span><span class='hs-varid'>fromListSysFun</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>clause</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fPatFromSys</span><span class='hs-layout'>,</span> <span class='hs-varid'>accumPatFromSys</span><span class='hs-keyglyph'>]</span>
<a name="line-180"></a> <span class='hs-layout'>(</span><span class='hs-varid'>normalB</span> <span class='hs-varid'>outEFromSys</span><span class='hs-layout'>)</span>
<a name="line-181"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>whereDecFromSys</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>]</span>
<a name="line-182"></a> <span class='hs-comment'>-- 3) Generate fromDynSimFun reusing parts of fromListSysFun</span>
<a name="line-183"></a> <span class='hs-comment'>-- Generate the list pattern: o1:o2: .. on:_</span>
<a name="line-184"></a> <span class='hs-varid'>listPatFromDynSim</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>oName</span> <span class='hs-varid'>pat</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>infixP</span> <span class='hs-layout'>(</span><span class='hs-varid'>varP</span> <span class='hs-varid'>oName</span><span class='hs-layout'>)</span> <span class='hs-chr'>'</span><span class='hs-layout'>(</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-varid'>pat</span><span class='hs-layout'>)</span>
<a name="line-185"></a> <span class='hs-varid'>wildP</span> <span class='hs-varid'>outNames</span>
<a name="line-186"></a> <span class='hs-comment'>-- Generate the rhs of the where declaration</span>
<a name="line-187"></a> <span class='hs-varid'>whereRHSFromDynSim</span> <span class='hs-keyglyph'>=</span>
<a name="line-188"></a> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>|</span> <span class='hs-varop'>$</span><span class='hs-layout'>(</span><span class='hs-varid'>varE</span> <span class='hs-varid'>fParFromSys</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varop'>$</span><span class='hs-layout'>(</span><span class='hs-varid'>varE</span> <span class='hs-varid'>accumParFromSys</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span><span class='hs-keyglyph'>]</span>
<a name="line-189"></a> <span class='hs-comment'>-- Generate the where clause declaration</span>
<a name="line-190"></a> <span class='hs-varid'>whereDecFromDynSim</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>valD</span> <span class='hs-varid'>listPatFromDynSim</span> <span class='hs-layout'>(</span><span class='hs-varid'>normalB</span> <span class='hs-varid'>whereRHSFromSys</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span>
<a name="line-191"></a> <span class='hs-comment'>-- Generate output expression: (Signal o1, Signal o2, ..., Signal on)</span>
<a name="line-192"></a> <span class='hs-varid'>outEFromDynSim</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>tupE</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span>
<a name="line-193"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>oName</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>varE</span> <span class='hs-chr'>'</span><span class='hs-varid'>map</span> <span class='hs-varop'>`appE`</span> <span class='hs-varid'>varE</span> <span class='hs-chr'>'</span><span class='hs-varid'>unsafeFromDyn</span> <span class='hs-varop'>`appE`</span> <span class='hs-varid'>varE</span> <span class='hs-varid'>oName</span><span class='hs-layout'>)</span>
<a name="line-194"></a> <span class='hs-varid'>outNames</span>
<a name="line-195"></a> <span class='hs-comment'>-- Finally, the full declaration of fromDynSimFun</span>
<a name="line-196"></a> <span class='hs-varid'>fromDynSimFunDec</span> <span class='hs-keyglyph'>=</span>
<a name="line-197"></a> <span class='hs-varid'>funD</span> <span class='hs-chr'>'</span><span class='hs-varid'>fromDynSimFun</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>clause</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fPatFromSys</span><span class='hs-layout'>,</span> <span class='hs-varid'>accumPatFromSys</span><span class='hs-keyglyph'>]</span>
<a name="line-198"></a> <span class='hs-layout'>(</span><span class='hs-varid'>normalB</span> <span class='hs-varid'>outEFromDynSim</span><span class='hs-layout'>)</span>
<a name="line-199"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>whereDecFromDynSim</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>]</span>
<a name="line-200"></a> <span class='hs-comment'>-- 4) Generate fromTHStrSimFun reusing parts of fromListSysFun</span>
<a name="line-201"></a> <span class='hs-varid'>listPatFromTHStrSim</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>listP</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span> <span class='hs-varid'>varP</span> <span class='hs-varid'>outNames</span>
<a name="line-202"></a> <span class='hs-comment'>-- Generate the rhs of the where declaration</span>
<a name="line-203"></a> <span class='hs-varid'>doFromTHStrSim</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>doE</span> <span class='hs-varop'>$</span>
<a name="line-204"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>bindS</span> <span class='hs-varid'>listPatFromDynSim</span> <span class='hs-keyglyph'>[</span><span class='hs-keyglyph'>|</span> <span class='hs-varop'>$</span><span class='hs-layout'>(</span><span class='hs-varid'>varE</span> <span class='hs-varid'>fParFromSys</span><span class='hs-layout'>)</span>
<a name="line-205"></a> <span class='hs-layout'>(</span><span class='hs-varid'>reverse</span> <span class='hs-varop'>$</span><span class='hs-layout'>(</span><span class='hs-varid'>varE</span> <span class='hs-varid'>accumParFromSys</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span>
<a name="line-206"></a> <span class='hs-varid'>noBindS</span> <span class='hs-varop'>$</span>
<a name="line-207"></a> <span class='hs-layout'>(</span><span class='hs-varid'>varE</span> <span class='hs-chr'>'</span><span class='hs-varid'>return</span><span class='hs-layout'>)</span> <span class='hs-varop'>`appE`</span>
<a name="line-208"></a> <span class='hs-layout'>(</span><span class='hs-varid'>tupE</span> <span class='hs-varop'>$</span> <span class='hs-varid'>map</span>
<a name="line-209"></a> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>oName</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>varE</span> <span class='hs-chr'>'</span><span class='hs-varid'>map</span> <span class='hs-varop'>`appE`</span> <span class='hs-varid'>varE</span> <span class='hs-chr'>'</span><span class='hs-varid'>parseProcType</span> <span class='hs-varop'>`appE`</span> <span class='hs-varid'>varE</span> <span class='hs-varid'>oName</span><span class='hs-layout'>)</span>
<a name="line-210"></a> <span class='hs-varid'>outNames</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>]</span>
<a name="line-211"></a> <span class='hs-comment'>-- Finally, the full declaration of fromThStrSimFun</span>
<a name="line-212"></a> <span class='hs-varid'>fromTHStrSimFunDec</span> <span class='hs-keyglyph'>=</span>
<a name="line-213"></a> <span class='hs-varid'>funD</span> <span class='hs-chr'>'</span><span class='hs-varid'>fromTHStrSimFun</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>clause</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fPatFromSys</span><span class='hs-layout'>,</span> <span class='hs-varid'>accumPatFromSys</span><span class='hs-keyglyph'>]</span>
<a name="line-214"></a> <span class='hs-layout'>(</span><span class='hs-varid'>normalB</span> <span class='hs-varid'>doFromTHStrSim</span><span class='hs-layout'>)</span>
<a name="line-215"></a> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>]</span>
<a name="line-216"></a> <span class='hs-comment'>-- 5) Generate the SysFun instance</span>
<a name="line-217"></a> <span class='hs-comment'>-- We reuse the output signal names for the head type variables</span>
<a name="line-218"></a> <span class='hs-comment'>-- (Signal o1, Signal o2, ..., Signal on)</span>
<a name="line-219"></a> <span class='hs-varid'>signalTupT</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>n</span> <span class='hs-varop'>==</span> <span class='hs-num'>1</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>conT</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Signal</span> <span class='hs-varop'>`appT`</span> <span class='hs-varid'>varT</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-varid'>outNames</span><span class='hs-layout'>)</span>
<a name="line-220"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>foldl</span> <span class='hs-varid'>accumApp</span> <span class='hs-layout'>(</span><span class='hs-varid'>tupleT</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>outNames</span>
<a name="line-221"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>accumApp</span> <span class='hs-varid'>accumT</span> <span class='hs-varid'>vName</span> <span class='hs-keyglyph'>=</span>
<a name="line-222"></a> <span class='hs-varid'>accumT</span> <span class='hs-varop'>`appT`</span> <span class='hs-layout'>(</span><span class='hs-varid'>conT</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Signal</span> <span class='hs-varop'>`appT`</span> <span class='hs-varid'>varT</span> <span class='hs-varid'>vName</span><span class='hs-layout'>)</span>
<a name="line-223"></a> <span class='hs-comment'>-- Create the ProcType context</span>
<a name="line-224"></a> <span class='hs-varid'>procTypeCxt</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'>vName</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>ClassP</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>ProcType</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>VarT</span> <span class='hs-varid'>vName</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-varid'>outNames</span>
<a name="line-225"></a>
<a name="line-226"></a> <span class='hs-comment'>-- Finally return the instance declaration</span>
<a name="line-227"></a> <span class='hs-varid'>sysFunIns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>instanceD</span> <span class='hs-layout'>(</span><span class='hs-varid'>cxt</span> <span class='hs-varid'>procTypeCxt</span><span class='hs-layout'>)</span>
<a name="line-228"></a> <span class='hs-layout'>(</span><span class='hs-varid'>conT</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>SysFun</span> <span class='hs-varop'>`appT`</span> <span class='hs-varid'>signalTupT</span><span class='hs-layout'>)</span>
<a name="line-229"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>applySysFunDec</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromListSysFunDec</span><span class='hs-keyglyph'>]</span>
<a name="line-230"></a> <span class='hs-comment'>-- 6) Generate the SysFun2SimFun instance </span>
<a name="line-231"></a> <span class='hs-varid'>listTupT</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>n</span> <span class='hs-varop'>==</span> <span class='hs-num'>1</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>listT</span> <span class='hs-varop'>`appT`</span> <span class='hs-varid'>varT</span> <span class='hs-layout'>(</span><span class='hs-varid'>head</span> <span class='hs-varid'>outNames</span><span class='hs-layout'>)</span>
<a name="line-232"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>foldl</span> <span class='hs-varid'>accumApp</span> <span class='hs-layout'>(</span><span class='hs-varid'>tupleT</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-varid'>outNames</span>
<a name="line-233"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>accumApp</span> <span class='hs-varid'>accumT</span> <span class='hs-varid'>vName</span> <span class='hs-keyglyph'>=</span>
<a name="line-234"></a> <span class='hs-varid'>accumT</span> <span class='hs-varop'>`appT`</span> <span class='hs-layout'>(</span><span class='hs-varid'>listT</span> <span class='hs-varop'>`appT`</span> <span class='hs-varid'>varT</span> <span class='hs-varid'>vName</span><span class='hs-layout'>)</span>
<a name="line-235"></a> <span class='hs-varid'>simFunIns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>instanceD</span> <span class='hs-layout'>(</span><span class='hs-varid'>cxt</span> <span class='hs-varid'>procTypeCxt</span><span class='hs-layout'>)</span>
<a name="line-236"></a> <span class='hs-layout'>(</span><span class='hs-varid'>conT</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>SysFunToSimFun</span> <span class='hs-varop'>`appT`</span> <span class='hs-varid'>signalTupT</span> <span class='hs-varop'>`appT`</span> <span class='hs-varid'>listTupT</span><span class='hs-layout'>)</span>
<a name="line-237"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fromDynSimFunDec</span><span class='hs-keyglyph'>]</span>
<a name="line-238"></a> <span class='hs-comment'>-- 7) Generate the SysFun2IOSimFun instance</span>
<a name="line-239"></a> <span class='hs-varid'>ioSimFunIns</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>instanceD</span> <span class='hs-layout'>(</span><span class='hs-varid'>cxt</span> <span class='hs-varid'>procTypeCxt</span><span class='hs-layout'>)</span>
<a name="line-240"></a> <span class='hs-layout'>(</span><span class='hs-varid'>conT</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>SysFunToIOSimFun</span> <span class='hs-varop'>`appT`</span>
<a name="line-241"></a> <span class='hs-varid'>signalTupT</span> <span class='hs-varop'>`appT`</span>
<a name="line-242"></a> <span class='hs-layout'>(</span><span class='hs-varid'>conT</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>IO</span> <span class='hs-varop'>`appT`</span> <span class='hs-varid'>listTupT</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-243"></a> <span class='hs-keyglyph'>[</span><span class='hs-varid'>fromTHStrSimFunDec</span><span class='hs-keyglyph'>]</span>
<a name="line-244"></a> <span class='hs-comment'>-- Finally, return the declarations</span>
<a name="line-245"></a> <span class='hs-varid'>liftM3</span> <span class='hs-conid'>(,,)</span> <span class='hs-varid'>sysFunIns</span> <span class='hs-varid'>simFunIns</span> <span class='hs-varid'>ioSimFunIns</span>
<a name="line-246"></a>
<a name="line-247"></a><span class='hs-comment'>---------------------------------------------------------------</span>
<a name="line-248"></a><span class='hs-comment'>-- Checking the type of a System Function with Template Haskell</span>
<a name="line-249"></a><span class='hs-comment'>---------------------------------------------------------------</span>
<a name="line-250"></a>
<a name="line-251"></a><a name="checkSysFType"></a><span class='hs-comment'>-- | Given a function type expressed with Template Haskell, check</span>
<a name="line-252"></a><span class='hs-comment'>-- whether it complies with the expected type of a system function</span>
<a name="line-253"></a><span class='hs-comment'>-- and, in that case, provide the type and number of the system</span>
<a name="line-254"></a><span class='hs-comment'>-- inputs and outputs.</span>
<a name="line-255"></a><span class='hs-definition'>checkSysFType</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Q</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Type</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span><span class='hs-conid'>Int</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Type</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span><span class='hs-conid'>Int</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-256"></a><span class='hs-definition'>checkSysFType</span> <span class='hs-varid'>t</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span> <span class='hs-keyword'>let</span> <span class='hs-layout'>(</span><span class='hs-varid'>inputTypes</span><span class='hs-layout'>,</span> <span class='hs-varid'>retType</span><span class='hs-layout'>,</span> <span class='hs-varid'>context</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unArrowT</span> <span class='hs-varid'>t</span>
<a name="line-257"></a> <span class='hs-layout'>(</span><span class='hs-varid'>outCons</span><span class='hs-layout'>,</span> <span class='hs-varid'>outTypes</span><span class='hs-layout'>,</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>unAppT</span> <span class='hs-varid'>retType</span>
<a name="line-258"></a> <span class='hs-comment'>-- Discard polymorphic system functions</span>
<a name="line-259"></a> <span class='hs-comment'>-- FIXME: We could support polymorphic signals, but it</span>
<a name="line-260"></a> <span class='hs-comment'>-- requires more work and we don't still know if it </span>
<a name="line-261"></a> <span class='hs-comment'>-- will be necessary anyway.</span>
<a name="line-262"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>isPoly</span> <span class='hs-varid'>context</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>qGiveUp</span> <span class='hs-varid'>name</span><span class='hs-layout'>)</span>
<a name="line-263"></a> <span class='hs-comment'>-- Check that all inputs are signals</span>
<a name="line-264"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>all</span> <span class='hs-varid'>isSignalT</span> <span class='hs-varid'>inputTypes</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>qGiveUp</span> <span class='hs-varid'>name</span><span class='hs-layout'>)</span>
<a name="line-265"></a> <span class='hs-comment'>-- Check the outputs</span>
<a name="line-266"></a> <span class='hs-varid'>outInfo</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>checkSysFOutputs</span> <span class='hs-layout'>(</span><span class='hs-varid'>outCons</span><span class='hs-layout'>,</span> <span class='hs-varid'>outTypes</span><span class='hs-layout'>)</span>
<a name="line-267"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>inputTypes</span><span class='hs-layout'>,</span> <span class='hs-varid'>length</span> <span class='hs-varid'>inputTypes</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>outInfo</span><span class='hs-layout'>)</span>
<a name="line-268"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>name</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"ForSyDe.System.checkSysFType"</span>
<a name="line-269"></a>
<a name="line-270"></a>
<a name="line-271"></a><a name="checkSysFOutputs"></a><span class='hs-comment'>-- | Check the output types of the system function given its</span>
<a name="line-272"></a><span class='hs-comment'>-- constructor and its type arguments</span>
<a name="line-273"></a><span class='hs-definition'>checkSysFOutputs</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Type</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Type</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Q</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>Type</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>)</span>
<a name="line-274"></a><span class='hs-comment'>-- The system function doesn't output any signals at all</span>
<a name="line-275"></a><span class='hs-definition'>checkSysFOutputs</span> <span class='hs-layout'>(</span><span class='hs-conid'>ConT</span> <span class='hs-varid'>n</span><span class='hs-layout'>,</span> <span class='hs-conid'>[]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>n</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>()</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-conid'>[]</span><span class='hs-layout'>,</span><span class='hs-num'>0</span><span class='hs-layout'>)</span>
<a name="line-276"></a><span class='hs-comment'>-- The system function just returns a signal</span>
<a name="line-277"></a><span class='hs-definition'>checkSysFOutputs</span> <span class='hs-layout'>(</span><span class='hs-conid'>ConT</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>arg</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Signal</span> <span class='hs-keyglyph'>=</span>
<a name="line-278"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>[</span><span class='hs-conid'>ConT</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Signal</span> <span class='hs-varop'>`AppT`</span> <span class='hs-varid'>arg</span> <span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-num'>1</span><span class='hs-layout'>)</span>
<a name="line-279"></a><span class='hs-comment'>-- The system function returns various signals in a tuple</span>
<a name="line-280"></a><span class='hs-comment'>-- NOTE: Unfortunatelly due to ghc's bug 1849 TupleT is never returned by reify</span>
<a name="line-281"></a><span class='hs-comment'>-- so we have to match the constructor with a regex</span>
<a name="line-282"></a><span class='hs-comment'>-- FIXME: Update this function whenever the bug is fixed </span>
<a name="line-283"></a><span class='hs-comment'>-- <a href="http://hackage.haskell.org/trac/ghc/ticket/1849">http://hackage.haskell.org/trac/ghc/ticket/1849</a></span>
<a name="line-284"></a><span class='hs-definition'>checkSysFOutputs</span> <span class='hs-layout'>(</span><span class='hs-conid'>ConT</span> <span class='hs-varid'>name</span><span class='hs-layout'>,</span> <span class='hs-varid'>outTypes</span><span class='hs-layout'>)</span>
<a name="line-285"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>show</span> <span class='hs-varid'>name</span> <span class='hs-varop'>=~</span> <span class='hs-str'>"^Data\\.Tuple\\.\\(,+\\)$"</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-286"></a> <span class='hs-varid'>when</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>$</span> <span class='hs-varid'>all</span> <span class='hs-varid'>isSignalT</span> <span class='hs-varid'>outTypes</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>qGiveUp</span> <span class='hs-varid'>checkSysFOutputsNm</span><span class='hs-layout'>)</span>
<a name="line-287"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>outTypes</span><span class='hs-layout'>,</span> <span class='hs-varid'>length</span> <span class='hs-varid'>outTypes</span><span class='hs-layout'>)</span>
<a name="line-288"></a><span class='hs-comment'>-- Otherwise the function output type is incorrect</span>
<a name="line-289"></a><span class='hs-definition'>checkSysFOutputs</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>qGiveUp</span> <span class='hs-varid'>checkSysFOutputsNm</span>
<a name="line-290"></a>
<a name="line-291"></a><a name="checkSysFOutputsNm"></a><span class='hs-definition'>checkSysFOutputsNm</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-292"></a><span class='hs-definition'>checkSysFOutputsNm</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"ForSyDe.System.SysFun.checkSysFOutputs"</span>
<a name="line-293"></a>
<a name="line-294"></a><a name="isSignalT"></a><span class='hs-comment'>-- | Check if a type corresponds to a signal</span>
<a name="line-295"></a><span class='hs-definition'>isSignalT</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Type</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-296"></a><span class='hs-definition'>isSignalT</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-conid'>ConT</span> <span class='hs-varid'>name</span><span class='hs-layout'>)</span> <span class='hs-varop'>`AppT`</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>name</span> <span class='hs-varop'>==</span> <span class='hs-chr'>'</span><span class='hs-chr'>'</span><span class='hs-conid'>Signal</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-297"></a><span class='hs-definition'>isSignalT</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-298"></a>
<a name="line-299"></a><a name="unsafeFromDyn"></a><span class='hs-comment'>-- | Unsafely transform from a dynamic value</span>
<a name="line-300"></a><span class='hs-definition'>unsafeFromDyn</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Typeable</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Dynamic</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-301"></a><span class='hs-definition'>unsafeFromDyn</span> <span class='hs-varid'>dyn</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromDyn</span> <span class='hs-varid'>dyn</span> <span class='hs-varid'>err</span>
<a name="line-302"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>err</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>intError</span> <span class='hs-str'>"unsafeFromDyn"</span> <span class='hs-layout'>(</span><span class='hs-conid'>DynMisMatch</span> <span class='hs-varid'>dyn</span> <span class='hs-varid'>targetType</span><span class='hs-layout'>)</span>
<a name="line-303"></a> <span class='hs-varid'>targetType</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>typeOf</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-304"></a>
<a name="line-305"></a><a name="parseProcType"></a><span class='hs-comment'>-- | Parse a proctype value</span>
<a name="line-306"></a><span class='hs-definition'>parseProcType</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span><span class='hs-conid'>ProcType</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-307"></a><span class='hs-definition'>parseProcType</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>=</span>
<a name="line-308"></a> <span class='hs-keyword'>case</span> <span class='hs-layout'>(</span><span class='hs-varid'>readP_to_S</span> <span class='hs-varid'>readProcType</span><span class='hs-layout'>)</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-309"></a> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-310"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>error</span> <span class='hs-layout'>(</span><span class='hs-str'>"parseProcType: error parsing element of type "</span> <span class='hs-varop'>++</span>
<a name="line-311"></a> <span class='hs-varid'>show</span> <span class='hs-layout'>(</span><span class='hs-varid'>typeOf</span> <span class='hs-layout'>(</span><span class='hs-varid'>undefined</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
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