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<pre><a name="line-1"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-2"></a><span class='hs-comment'>-- |</span>
<a name="line-3"></a><span class='hs-comment'>-- Module : Distribution.Simple.Compiler</span>
<a name="line-4"></a><span class='hs-comment'>-- Copyright : Isaac Jones 2003-2004</span>
<a name="line-5"></a><span class='hs-comment'>--</span>
<a name="line-6"></a><span class='hs-comment'>-- Maintainer : cabal-devel@haskell.org</span>
<a name="line-7"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-8"></a><span class='hs-comment'>--</span>
<a name="line-9"></a><span class='hs-comment'>-- This should be a much more sophisticated abstraction than it is. Currently</span>
<a name="line-10"></a><span class='hs-comment'>-- it's just a bit of data about the compiler, like it's flavour and name and</span>
<a name="line-11"></a><span class='hs-comment'>-- version. The reason it's just data is because currently it has to be in</span>
<a name="line-12"></a><span class='hs-comment'>-- 'Read' and 'Show' so it can be saved along with the 'LocalBuildInfo'. The</span>
<a name="line-13"></a><span class='hs-comment'>-- only interesting bit of info it contains is a mapping between language</span>
<a name="line-14"></a><span class='hs-comment'>-- extensions and compiler command line flags. This module also defines a</span>
<a name="line-15"></a><span class='hs-comment'>-- 'PackageDB' type which is used to refer to package databases. Most compilers</span>
<a name="line-16"></a><span class='hs-comment'>-- only know about a single global package collection but GHC has a global and</span>
<a name="line-17"></a><span class='hs-comment'>-- per-user one and it lets you create arbitrary other package databases. We do</span>
<a name="line-18"></a><span class='hs-comment'>-- not yet fully support this latter feature.</span>
<a name="line-19"></a>
<a name="line-20"></a><span class='hs-comment'>{- All rights reserved.
<a name="line-21"></a>
<a name="line-22"></a>Redistribution and use in source and binary forms, with or without
<a name="line-23"></a>modification, are permitted provided that the following conditions are
<a name="line-24"></a>met:
<a name="line-25"></a>
<a name="line-26"></a> * Redistributions of source code must retain the above copyright
<a name="line-27"></a> notice, this list of conditions and the following disclaimer.
<a name="line-28"></a>
<a name="line-29"></a> * Redistributions in binary form must reproduce the above
<a name="line-30"></a> copyright notice, this list of conditions and the following
<a name="line-31"></a> disclaimer in the documentation and/or other materials provided
<a name="line-32"></a> with the distribution.
<a name="line-33"></a>
<a name="line-34"></a> * Neither the name of Isaac Jones nor the names of other
<a name="line-35"></a> contributors may be used to endorse or promote products derived
<a name="line-36"></a> from this software without specific prior written permission.
<a name="line-37"></a>
<a name="line-38"></a>THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
<a name="line-39"></a>"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
<a name="line-40"></a>LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
<a name="line-41"></a>A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
<a name="line-42"></a>OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
<a name="line-43"></a>SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
<a name="line-44"></a>LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
<a name="line-45"></a>DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
<a name="line-46"></a>THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
<a name="line-47"></a>(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<a name="line-48"></a>OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -}</span>
<a name="line-49"></a>
<a name="line-50"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Distribution</span><span class='hs-varop'>.</span><span class='hs-conid'>Simple</span><span class='hs-varop'>.</span><span class='hs-conid'>Compiler</span> <span class='hs-layout'>(</span>
<a name="line-51"></a> <span class='hs-comment'>-- * Haskell implementations</span>
<a name="line-52"></a> <span class='hs-keyword'>module</span> <span class='hs-conid'>Distribution</span><span class='hs-varop'>.</span><span class='hs-conid'>Compiler</span><span class='hs-layout'>,</span>
<a name="line-53"></a> <span class='hs-conid'>Compiler</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-54"></a> <span class='hs-varid'>showCompilerId</span><span class='hs-layout'>,</span> <span class='hs-varid'>compilerFlavor</span><span class='hs-layout'>,</span> <span class='hs-varid'>compilerVersion</span><span class='hs-layout'>,</span>
<a name="line-55"></a>
<a name="line-56"></a> <span class='hs-comment'>-- * Support for package databases</span>
<a name="line-57"></a> <span class='hs-conid'>PackageDB</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-58"></a> <span class='hs-conid'>PackageDBStack</span><span class='hs-layout'>,</span>
<a name="line-59"></a> <span class='hs-varid'>registrationPackageDB</span><span class='hs-layout'>,</span>
<a name="line-60"></a>
<a name="line-61"></a> <span class='hs-comment'>-- * Support for optimisation levels</span>
<a name="line-62"></a> <span class='hs-conid'>OptimisationLevel</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-63"></a> <span class='hs-varid'>flagToOptimisationLevel</span><span class='hs-layout'>,</span>
<a name="line-64"></a>
<a name="line-65"></a> <span class='hs-comment'>-- * Support for language extensions</span>
<a name="line-66"></a> <span class='hs-conid'>Flag</span><span class='hs-layout'>,</span>
<a name="line-67"></a> <span class='hs-varid'>languageToFlags</span><span class='hs-layout'>,</span>
<a name="line-68"></a> <span class='hs-varid'>unsupportedLanguages</span><span class='hs-layout'>,</span>
<a name="line-69"></a> <span class='hs-varid'>extensionsToFlags</span><span class='hs-layout'>,</span>
<a name="line-70"></a> <span class='hs-varid'>unsupportedExtensions</span>
<a name="line-71"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-72"></a>
<a name="line-73"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Distribution</span><span class='hs-varop'>.</span><span class='hs-conid'>Compiler</span>
<a name="line-74"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Distribution</span><span class='hs-varop'>.</span><span class='hs-conid'>Version</span> <span class='hs-layout'>(</span><span class='hs-conid'>Version</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-75"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Distribution</span><span class='hs-varop'>.</span><span class='hs-conid'>Text</span> <span class='hs-layout'>(</span><span class='hs-varid'>display</span><span class='hs-layout'>)</span>
<a name="line-76"></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'>Extension</span> <span class='hs-layout'>(</span><span class='hs-conid'>Language</span><span class='hs-layout'>(</span><span class='hs-conid'>Haskell98</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Extension</span><span class='hs-layout'>)</span>
<a name="line-77"></a>
<a name="line-78"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>nub</span><span class='hs-layout'>)</span>
<a name="line-79"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-varid'>catMaybes</span><span class='hs-layout'>,</span> <span class='hs-varid'>isNothing</span><span class='hs-layout'>)</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="Compiler"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Compiler</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Compiler</span> <span class='hs-layout'>{</span>
<a name="line-82"></a> <span class='hs-varid'>compilerId</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>CompilerId</span><span class='hs-layout'>,</span>
<a name="line-83"></a> <span class='hs-varid'>compilerLanguages</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Language</span><span class='hs-layout'>,</span> <span class='hs-conid'>String</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span>
<a name="line-84"></a> <span class='hs-varid'>compilerExtensions</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-conid'>Extension</span><span class='hs-layout'>,</span> <span class='hs-conid'>String</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-85"></a> <span class='hs-layout'>}</span>
<a name="line-86"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-87"></a>
<a name="line-88"></a><a name="showCompilerId"></a><span class='hs-definition'>showCompilerId</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Compiler</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span>
<a name="line-89"></a><span class='hs-definition'>showCompilerId</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>display</span> <span class='hs-varop'>.</span> <span class='hs-varid'>compilerId</span>
<a name="line-90"></a>
<a name="line-91"></a><a name="compilerFlavor"></a><span class='hs-definition'>compilerFlavor</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Compiler</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CompilerFlavor</span>
<a name="line-92"></a><span class='hs-definition'>compilerFlavor</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>CompilerId</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>compilerId</span>
<a name="line-93"></a>
<a name="line-94"></a><a name="compilerVersion"></a><span class='hs-definition'>compilerVersion</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Compiler</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Version</span>
<a name="line-95"></a><span class='hs-definition'>compilerVersion</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>CompilerId</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span> <span class='hs-varid'>compilerId</span>
<a name="line-96"></a>
<a name="line-97"></a><span class='hs-comment'>-- ------------------------------------------------------------</span>
<a name="line-98"></a><span class='hs-comment'>-- * Package databases</span>
<a name="line-99"></a><span class='hs-comment'>-- ------------------------------------------------------------</span>
<a name="line-100"></a>
<a name="line-101"></a><a name="PackageDB"></a><span class='hs-comment'>-- |Some compilers have a notion of a database of available packages.</span>
<a name="line-102"></a><a name="PackageDB"></a><span class='hs-comment'>-- For some there is just one global db of packages, other compilers</span>
<a name="line-103"></a><a name="PackageDB"></a><span class='hs-comment'>-- support a per-user or an arbitrary db specified at some location in</span>
<a name="line-104"></a><a name="PackageDB"></a><span class='hs-comment'>-- the file system. This can be used to build isloated environments of</span>
<a name="line-105"></a><a name="PackageDB"></a><span class='hs-comment'>-- packages, for example to build a collection of related packages</span>
<a name="line-106"></a><a name="PackageDB"></a><span class='hs-comment'>-- without installing them globally.</span>
<a name="line-107"></a><a name="PackageDB"></a><span class='hs-comment'>--</span>
<a name="line-108"></a><a name="PackageDB"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>PackageDB</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>GlobalPackageDB</span>
<a name="line-109"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>UserPackageDB</span>
<a name="line-110"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>SpecificPackageDB</span> <span class='hs-conid'>FilePath</span>
<a name="line-111"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Ord</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>)</span>
<a name="line-112"></a>
<a name="line-113"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- | We typically get packages from several databases, and stack them</span>
<a name="line-114"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- together. This type lets us be explicit about that stacking. For example</span>
<a name="line-115"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- typical stacks include:</span>
<a name="line-116"></a><a name="PackageDBStack"></a><span class='hs-comment'>--</span>
<a name="line-117"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- > [GlobalPackageDB]</span>
<a name="line-118"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- > [GlobalPackageDB, UserPackageDB]</span>
<a name="line-119"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- > [GlobalPackageDB, SpecificPackageDB "package.conf.inplace"]</span>
<a name="line-120"></a><a name="PackageDBStack"></a><span class='hs-comment'>--</span>
<a name="line-121"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- Note that the 'GlobalPackageDB' is invariably at the bottom since it</span>
<a name="line-122"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- contains the rts, base and other special compiler-specific packages.</span>
<a name="line-123"></a><a name="PackageDBStack"></a><span class='hs-comment'>--</span>
<a name="line-124"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- We are not restricted to using just the above combinations. In particular</span>
<a name="line-125"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- we can use several custom package dbs and the user package db together.</span>
<a name="line-126"></a><a name="PackageDBStack"></a><span class='hs-comment'>--</span>
<a name="line-127"></a><a name="PackageDBStack"></a><span class='hs-comment'>-- When it comes to writing, the top most (last) package is used.</span>
<a name="line-128"></a><a name="PackageDBStack"></a><span class='hs-comment'>--</span>
<a name="line-129"></a><a name="PackageDBStack"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>PackageDBStack</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>PackageDB</span><span class='hs-keyglyph'>]</span>
<a name="line-130"></a>
<a name="line-131"></a><a name="registrationPackageDB"></a><span class='hs-comment'>-- | Return the package that we should register into. This is the package db at</span>
<a name="line-132"></a><span class='hs-comment'>-- the top of the stack.</span>
<a name="line-133"></a><span class='hs-comment'>--</span>
<a name="line-134"></a><span class='hs-definition'>registrationPackageDB</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PackageDBStack</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>PackageDB</span>
<a name="line-135"></a><span class='hs-definition'>registrationPackageDB</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"internal error: empty package db set"</span>
<a name="line-136"></a><span class='hs-definition'>registrationPackageDB</span> <span class='hs-varid'>dbs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>last</span> <span class='hs-varid'>dbs</span>
<a name="line-137"></a>
<a name="line-138"></a><span class='hs-comment'>-- ------------------------------------------------------------</span>
<a name="line-139"></a><span class='hs-comment'>-- * Optimisation levels</span>
<a name="line-140"></a><span class='hs-comment'>-- ------------------------------------------------------------</span>
<a name="line-141"></a>
<a name="line-142"></a><a name="OptimisationLevel"></a><span class='hs-comment'>-- | Some compilers support optimising. Some have different levels.</span>
<a name="line-143"></a><a name="OptimisationLevel"></a><span class='hs-comment'>-- For compliers that do not the level is just capped to the level</span>
<a name="line-144"></a><a name="OptimisationLevel"></a><span class='hs-comment'>-- they do support.</span>
<a name="line-145"></a><a name="OptimisationLevel"></a><span class='hs-comment'>--</span>
<a name="line-146"></a><a name="OptimisationLevel"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>OptimisationLevel</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NoOptimisation</span>
<a name="line-147"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NormalOptimisation</span>
<a name="line-148"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>MaximumOptimisation</span>
<a name="line-149"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>,</span> <span class='hs-conid'>Read</span><span class='hs-layout'>,</span> <span class='hs-conid'>Enum</span><span class='hs-layout'>,</span> <span class='hs-conid'>Bounded</span><span class='hs-layout'>)</span>
<a name="line-150"></a>
<a name="line-151"></a><a name="flagToOptimisationLevel"></a><span class='hs-definition'>flagToOptimisationLevel</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>OptimisationLevel</span>
<a name="line-152"></a><span class='hs-definition'>flagToOptimisationLevel</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NormalOptimisation</span>
<a name="line-153"></a><span class='hs-definition'>flagToOptimisationLevel</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>reads</span> <span class='hs-varid'>s</span> <span class='hs-keyword'>of</span>
<a name="line-154"></a> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-str'>""</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-155"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'>>=</span> <span class='hs-varid'>fromEnum</span> <span class='hs-layout'>(</span><span class='hs-varid'>minBound</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>OptimisationLevel</span><span class='hs-layout'>)</span>
<a name="line-156"></a> <span class='hs-varop'>&&</span> <span class='hs-varid'>i</span> <span class='hs-varop'><=</span> <span class='hs-varid'>fromEnum</span> <span class='hs-layout'>(</span><span class='hs-varid'>maxBound</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>OptimisationLevel</span><span class='hs-layout'>)</span>
<a name="line-157"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>toEnum</span> <span class='hs-varid'>i</span>
<a name="line-158"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Bad optimisation level: "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>show</span> <span class='hs-varid'>i</span>
<a name="line-159"></a> <span class='hs-varop'>++</span> <span class='hs-str'>". Valid values are 0..2"</span>
<a name="line-160"></a> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-str'>"Can't parse optimisation level "</span> <span class='hs-varop'>++</span> <span class='hs-varid'>s</span>
<a name="line-161"></a>
<a name="line-162"></a><span class='hs-comment'>-- ------------------------------------------------------------</span>
<a name="line-163"></a><span class='hs-comment'>-- * Languages and Extensions</span>
<a name="line-164"></a><span class='hs-comment'>-- ------------------------------------------------------------</span>
<a name="line-165"></a>
<a name="line-166"></a><a name="unsupportedLanguages"></a><span class='hs-definition'>unsupportedLanguages</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Compiler</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Language</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Language</span><span class='hs-keyglyph'>]</span>
<a name="line-167"></a><span class='hs-definition'>unsupportedLanguages</span> <span class='hs-varid'>comp</span> <span class='hs-varid'>langs</span> <span class='hs-keyglyph'>=</span>
<a name="line-168"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>lang</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>lang</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>langs</span>
<a name="line-169"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>isNothing</span> <span class='hs-layout'>(</span><span class='hs-varid'>languageToFlag</span> <span class='hs-varid'>comp</span> <span class='hs-varid'>lang</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>]</span>
<a name="line-170"></a>
<a name="line-171"></a><a name="languageToFlags"></a><span class='hs-definition'>languageToFlags</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Compiler</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Language</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Flag</span><span class='hs-keyglyph'>]</span>
<a name="line-172"></a><span class='hs-definition'>languageToFlags</span> <span class='hs-varid'>comp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>null</span><span class='hs-layout'>)</span>
<a name="line-173"></a> <span class='hs-varop'>.</span> <span class='hs-varid'>catMaybes</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>languageToFlag</span> <span class='hs-varid'>comp</span><span class='hs-layout'>)</span>
<a name="line-174"></a> <span class='hs-varop'>.</span> <span class='hs-varid'>maybe</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Haskell98</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>-></span><span class='hs-keyglyph'>[</span><span class='hs-varid'>x</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>)</span>
<a name="line-175"></a>
<a name="line-176"></a><a name="languageToFlag"></a><span class='hs-definition'>languageToFlag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Compiler</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Language</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Flag</span>
<a name="line-177"></a><span class='hs-definition'>languageToFlag</span> <span class='hs-varid'>comp</span> <span class='hs-varid'>ext</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lookup</span> <span class='hs-varid'>ext</span> <span class='hs-layout'>(</span><span class='hs-varid'>compilerLanguages</span> <span class='hs-varid'>comp</span><span class='hs-layout'>)</span>
<a name="line-178"></a>
<a name="line-179"></a>
<a name="line-180"></a><a name="unsupportedExtensions"></a><span class='hs-comment'>-- |For the given compiler, return the extensions it does not support.</span>
<a name="line-181"></a><span class='hs-definition'>unsupportedExtensions</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Compiler</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Extension</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Extension</span><span class='hs-keyglyph'>]</span>
<a name="line-182"></a><span class='hs-definition'>unsupportedExtensions</span> <span class='hs-varid'>comp</span> <span class='hs-varid'>exts</span> <span class='hs-keyglyph'>=</span>
<a name="line-183"></a> <span class='hs-keyglyph'>[</span> <span class='hs-varid'>ext</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>ext</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>exts</span>
<a name="line-184"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>isNothing</span> <span class='hs-layout'>(</span><span class='hs-varid'>extensionToFlag</span> <span class='hs-varid'>comp</span> <span class='hs-varid'>ext</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>]</span>
<a name="line-185"></a>
<a name="line-186"></a><a name="Flag"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Flag</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>String</span>
<a name="line-187"></a>
<a name="line-188"></a><a name="extensionsToFlags"></a><span class='hs-comment'>-- |For the given compiler, return the flags for the supported extensions.</span>
<a name="line-189"></a><span class='hs-definition'>extensionsToFlags</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Compiler</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Extension</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Flag</span><span class='hs-keyglyph'>]</span>
<a name="line-190"></a><span class='hs-definition'>extensionsToFlags</span> <span class='hs-varid'>comp</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>nub</span> <span class='hs-varop'>.</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-varid'>not</span> <span class='hs-varop'>.</span> <span class='hs-varid'>null</span><span class='hs-layout'>)</span>
<a name="line-191"></a> <span class='hs-varop'>.</span> <span class='hs-varid'>catMaybes</span> <span class='hs-varop'>.</span> <span class='hs-varid'>map</span> <span class='hs-layout'>(</span><span class='hs-varid'>extensionToFlag</span> <span class='hs-varid'>comp</span><span class='hs-layout'>)</span>
<a name="line-192"></a>
<a name="line-193"></a><a name="extensionToFlag"></a><span class='hs-definition'>extensionToFlag</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Compiler</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Extension</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>Flag</span>
<a name="line-194"></a><span class='hs-definition'>extensionToFlag</span> <span class='hs-varid'>comp</span> <span class='hs-varid'>ext</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lookup</span> <span class='hs-varid'>ext</span> <span class='hs-layout'>(</span><span class='hs-varid'>compilerExtensions</span> <span class='hs-varid'>comp</span><span class='hs-layout'>)</span>
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