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<pre><a name="line-1"></a><span class='hs-comment'>{- Copyright © 2012, Vincent Elisha Lee Frey. All rights reserved.
<a name="line-2"></a> - This is open source software distributed under a MIT license.
<a name="line-3"></a> - See the file 'LICENSE' for further information.
<a name="line-4"></a> -}</span>
<a name="line-5"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>Console</span><span class='hs-varop'>.</span><span class='hs-conid'>CmdTheLine</span><span class='hs-varop'>.</span><span class='hs-conid'>Common</span> <span class='hs-keyword'>where</span>
<a name="line-6"></a>
<a name="line-7"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Function</span> <span class='hs-layout'>(</span> <span class='hs-varid'>on</span> <span class='hs-layout'>)</span>
<a name="line-8"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>PrettyPrint</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Doc</span><span class='hs-layout'>,</span> <span class='hs-varid'>text</span> <span class='hs-layout'>)</span>
<a name="line-9"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Applicative</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span> <span class='hs-layout'>)</span>
<a name="line-10"></a>
<a name="line-11"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Map</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>M</span>
<a name="line-12"></a>
<a name="line-13"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span><span class='hs-varop'>.</span><span class='hs-conid'>Trans</span><span class='hs-varop'>.</span><span class='hs-conid'>Error</span>
<a name="line-14"></a>
<a name="line-15"></a><a name="Absence"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Absence</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Absent</span>
<a name="line-16"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Present</span> <span class='hs-conid'>String</span>
<a name="line-17"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>)</span>
<a name="line-18"></a>
<a name="line-19"></a><a name="OptKind"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>OptKind</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FlagKind</span>
<a name="line-20"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OptKind</span>
<a name="line-21"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>OptVal</span> <span class='hs-conid'>String</span>
<a name="line-22"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>)</span>
<a name="line-23"></a>
<a name="line-24"></a><a name="PosKind"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>PosKind</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>PosAny</span>
<a name="line-25"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PosN</span> <span class='hs-conid'>Bool</span> <span class='hs-conid'>Int</span>
<a name="line-26"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PosL</span> <span class='hs-conid'>Bool</span> <span class='hs-conid'>Int</span>
<a name="line-27"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>PosR</span> <span class='hs-conid'>Bool</span> <span class='hs-conid'>Int</span>
<a name="line-28"></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>
<a name="line-29"></a>
<a name="line-30"></a><a name="ArgInfo"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ArgInfo</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ArgInfo</span>
<a name="line-31"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>absence</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Absence</span>
<a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>argDoc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-33"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>argName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-34"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>argSec</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-35"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>posKind</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>PosKind</span>
<a name="line-36"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>optKind</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>OptKind</span>
<a name="line-37"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>optNames</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-38"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>repeatable</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bool</span>
<a name="line-39"></a> <span class='hs-layout'>}</span>
<a name="line-40"></a>
<a name="line-41"></a><a name="instance%20Eq%20ArgInfo"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-conid'>ArgInfo</span> <span class='hs-keyword'>where</span>
<a name="line-42"></a> <span class='hs-varid'>ai</span> <span class='hs-varop'>==</span> <span class='hs-varid'>ai'</span>
<a name="line-43"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isPos</span> <span class='hs-varid'>ai</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isPos</span> <span class='hs-varid'>ai'</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-varop'>`on`</span> <span class='hs-varid'>posKind</span><span class='hs-layout'>)</span> <span class='hs-varid'>ai</span> <span class='hs-varid'>ai'</span>
<a name="line-44"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isOpt</span> <span class='hs-varid'>ai</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isOpt</span> <span class='hs-varid'>ai'</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>==</span><span class='hs-layout'>)</span> <span class='hs-varop'>`on`</span> <span class='hs-varid'>optNames</span><span class='hs-layout'>)</span> <span class='hs-varid'>ai</span> <span class='hs-varid'>ai'</span>
<a name="line-45"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-46"></a>
<a name="line-47"></a><a name="instance%20Ord%20ArgInfo"></a><span class='hs-comment'>-- This Ord instance works for placing in 'Data.Map's, but not much else.</span>
<a name="line-48"></a><a name="instance%20Ord%20ArgInfo"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Ord</span> <span class='hs-conid'>ArgInfo</span> <span class='hs-keyword'>where</span>
<a name="line-49"></a> <span class='hs-varid'>compare</span> <span class='hs-varid'>ai</span> <span class='hs-varid'>ai'</span>
<a name="line-50"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isPos</span> <span class='hs-varid'>ai</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isPos</span> <span class='hs-varid'>ai'</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>compare</span> <span class='hs-varop'>`on`</span> <span class='hs-varid'>posKind</span><span class='hs-layout'>)</span> <span class='hs-varid'>ai</span> <span class='hs-varid'>ai'</span>
<a name="line-51"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isOpt</span> <span class='hs-varid'>ai</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isOpt</span> <span class='hs-varid'>ai'</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>compare</span> <span class='hs-varop'>`on`</span> <span class='hs-varid'>optNames</span><span class='hs-layout'>)</span> <span class='hs-varid'>ai</span> <span class='hs-varid'>ai'</span>
<a name="line-52"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>isOpt</span> <span class='hs-varid'>ai</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>isPos</span> <span class='hs-varid'>ai'</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>LT</span>
<a name="line-53"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>GT</span>
<a name="line-54"></a>
<a name="line-55"></a>
<a name="line-56"></a><a name="Arg"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Arg</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Opt</span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span> <span class='hs-conid'>Int</span> <span class='hs-comment'>-- The position were the argument was found.</span>
<a name="line-57"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- The name by which the argument was supplied.</span>
<a name="line-58"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Maybe</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- If present, a value assigned to the argument.</span>
<a name="line-59"></a> <span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-60"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Pos</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- A list of positional arguments</span>
<a name="line-61"></a>
<a name="line-62"></a><a name="CmdLine"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>CmdLine</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>M</span><span class='hs-varop'>.</span><span class='hs-conid'>Map</span> <span class='hs-conid'>ArgInfo</span> <span class='hs-conid'>Arg</span>
<a name="line-63"></a>
<a name="line-64"></a><a name="isOpt"></a><span class='hs-definition'>isOpt</span><span class='hs-layout'>,</span> <span class='hs-varid'>isPos</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>ArgInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-65"></a><span class='hs-definition'>isOpt</span> <span class='hs-varid'>ai</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>optNames</span> <span class='hs-varid'>ai</span> <span class='hs-varop'>/=</span> <span class='hs-conid'>[]</span>
<a name="line-66"></a><a name="isPos"></a><span class='hs-definition'>isPos</span> <span class='hs-varid'>ai</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>optNames</span> <span class='hs-varid'>ai</span> <span class='hs-varop'>==</span> <span class='hs-conid'>[]</span>
<a name="line-67"></a>
<a name="line-68"></a><a name="ManBlock"></a><span class='hs-comment'>{- |
<a name="line-69"></a> Any 'String' argument to a 'ManBlock' constructor may contain the
<a name="line-70"></a> following significant forms for a limited kind of meta-programing.
<a name="line-71"></a>
<a name="line-72"></a> * $(i,text): italicizes @text@.
<a name="line-73"></a>
<a name="line-74"></a> * $(b,text): bolds @text@.
<a name="line-75"></a>
<a name="line-76"></a> * $(mname): evaluates to the name of the default term if there are choices
<a name="line-77"></a> of commands, or the only term otherwise.
<a name="line-78"></a>
<a name="line-79"></a> * $(tname): evaluates to the name of the currently evaluating term.
<a name="line-80"></a>
<a name="line-81"></a> Additionally, text inside the content portion of an 'I' constructor may
<a name="line-82"></a> contain one of the following significant forms.
<a name="line-83"></a>
<a name="line-84"></a> * $(argName): evaluates to the name of the argument being documented.
<a name="line-85"></a>
<a name="line-86"></a>-}</span>
<a name="line-87"></a><a name="ManBlock"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ManBlock</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>S</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ A section title.</span>
<a name="line-88"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>P</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ A paragraph.</span>
<a name="line-89"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>I</span> <span class='hs-conid'>String</span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ A label-content pair. As in an argument</span>
<a name="line-90"></a> <span class='hs-comment'>-- definition and its accompanying</span>
<a name="line-91"></a> <span class='hs-comment'>-- documentation.</span>
<a name="line-92"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NoBlank</span> <span class='hs-comment'>-- ^ Suppress the normal blank line following</span>
<a name="line-93"></a> <span class='hs-comment'>-- a 'P' or an 'I'.</span>
<a name="line-94"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>)</span>
<a name="line-95"></a>
<a name="line-96"></a><a name="Title"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Title</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>String</span><span class='hs-layout'>,</span> <span class='hs-conid'>String</span> <span class='hs-layout'>)</span>
<a name="line-97"></a>
<a name="line-98"></a><a name="Page"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Page</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Title</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ManBlock</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>)</span>
<a name="line-99"></a>
<a name="line-100"></a><a name="TermInfo"></a><span class='hs-comment'>-- | Information about a 'Term'. It is recommended that 'TermInfo's be</span>
<a name="line-101"></a><a name="TermInfo"></a><span class='hs-comment'>-- created by customizing 'defTI', as in</span>
<a name="line-102"></a><a name="TermInfo"></a><span class='hs-comment'>--</span>
<a name="line-103"></a><a name="TermInfo"></a><span class='hs-comment'>-- > termInfo = defTI</span>
<a name="line-104"></a><a name="TermInfo"></a><span class='hs-comment'>-- > { termName = "caroline-no"</span>
<a name="line-105"></a><a name="TermInfo"></a><span class='hs-comment'>-- > , termDoc = "carry a line off"</span>
<a name="line-106"></a><a name="TermInfo"></a><span class='hs-comment'>-- > }</span>
<a name="line-107"></a><a name="TermInfo"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>TermInfo</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TermInfo</span>
<a name="line-108"></a> <span class='hs-layout'>{</span>
<a name="line-109"></a> <span class='hs-comment'>-- | The name of the command or program represented by the term. Defaults to</span>
<a name="line-110"></a> <span class='hs-comment'>-- @\"\"@.</span>
<a name="line-111"></a> <span class='hs-varid'>termName</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-112"></a>
<a name="line-113"></a> <span class='hs-comment'>-- | Documentation for the term. Defaults to @\"\"@.</span>
<a name="line-114"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>termDoc</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-115"></a>
<a name="line-116"></a> <span class='hs-comment'>-- | The section under which to place the terms documentation.</span>
<a name="line-117"></a> <span class='hs-comment'>-- Defaults to @\"COMMANDS\"@.</span>
<a name="line-118"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>termSec</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-119"></a>
<a name="line-120"></a> <span class='hs-comment'>-- | The section under which to place a term's argument's</span>
<a name="line-121"></a> <span class='hs-comment'>-- documentation by default. Defaults to @\"OPTIONS\"@.</span>
<a name="line-122"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>stdOptSec</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-123"></a>
<a name="line-124"></a> <span class='hs-comment'>-- | A version string. Must be left blank for commands. Defaults to @\"\"@.</span>
<a name="line-125"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>version</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span>
<a name="line-126"></a>
<a name="line-127"></a> <span class='hs-comment'>-- | A list of 'ManBlock's to append to the default @[ManBlock]@. Defaults</span>
<a name="line-128"></a> <span class='hs-comment'>-- to @[]@.</span>
<a name="line-129"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>man</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ManBlock</span><span class='hs-keyglyph'>]</span>
<a name="line-130"></a> <span class='hs-layout'>}</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>)</span>
<a name="line-131"></a>
<a name="line-132"></a><a name="defTI"></a><span class='hs-comment'>-- | A default 'TermInfo'.</span>
<a name="line-133"></a><span class='hs-definition'>defTI</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TermInfo</span>
<a name="line-134"></a><span class='hs-definition'>defTI</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TermInfo</span>
<a name="line-135"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>termName</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span>
<a name="line-136"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>version</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span>
<a name="line-137"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>termDoc</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>""</span>
<a name="line-138"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>termSec</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"COMMANDS"</span>
<a name="line-139"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>stdOptSec</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"OPTIONS"</span>
<a name="line-140"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>man</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>[]</span>
<a name="line-141"></a> <span class='hs-layout'>}</span>
<a name="line-142"></a>
<a name="line-143"></a><a name="Command"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Command</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span> <span class='hs-conid'>TermInfo</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ArgInfo</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>)</span>
<a name="line-144"></a>
<a name="line-145"></a><a name="EvalInfo"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>EvalInfo</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EvalInfo</span>
<a name="line-146"></a> <span class='hs-layout'>{</span> <span class='hs-varid'>term</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Command</span> <span class='hs-comment'>-- The chosen term for this run.</span>
<a name="line-147"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>main</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Command</span> <span class='hs-comment'>-- The default term.</span>
<a name="line-148"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>choices</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>Command</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- A list of command-terms.</span>
<a name="line-149"></a> <span class='hs-layout'>}</span>
<a name="line-150"></a>
<a name="line-151"></a><a name="HelpFormat"></a><span class='hs-comment'>-- | The format to print help in.</span>
<a name="line-152"></a><a name="HelpFormat"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>HelpFormat</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Pager</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Plain</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Groff</span> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>)</span>
<a name="line-153"></a>
<a name="line-154"></a><a name="Fail"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Fail</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>MsgFail</span> <span class='hs-conid'>Doc</span>
<a name="line-155"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>UsageFail</span> <span class='hs-conid'>Doc</span>
<a name="line-156"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>HelpFail</span> <span class='hs-conid'>HelpFormat</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>String</span><span class='hs-layout'>)</span>
<a name="line-157"></a>
<a name="line-158"></a><a name="instance%20Error%20Fail"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Error</span> <span class='hs-conid'>Fail</span> <span class='hs-keyword'>where</span>
<a name="line-159"></a> <span class='hs-varid'>strMsg</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>MsgFail</span> <span class='hs-varop'>.</span> <span class='hs-varid'>text</span>
<a name="line-160"></a>
<a name="line-161"></a><a name="Err"></a><span class='hs-comment'>-- | A monad for values in the context of possibly failing with a helpful</span>
<a name="line-162"></a><a name="Err"></a><span class='hs-comment'>-- message.</span>
<a name="line-163"></a><a name="Err"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Err</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ErrorT</span> <span class='hs-conid'>Fail</span> <span class='hs-conid'>IO</span>
<a name="line-164"></a>
<a name="line-165"></a>
<a name="line-166"></a><a name="Yield"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Yield</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EvalInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>CmdLine</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Err</span> <span class='hs-varid'>a</span>
<a name="line-167"></a>
<a name="line-168"></a><a name="Term"></a><span class='hs-comment'>-- | The underlying Applicative of the library. A @Term@ represents a value</span>
<a name="line-169"></a><a name="Term"></a><span class='hs-comment'>-- in the context of being computed from the command line arguments.</span>
<a name="line-170"></a><a name="Term"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Term</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Term</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>ArgInfo</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>(</span><span class='hs-conid'>Yield</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-171"></a>
<a name="line-172"></a><a name="instance%20Functor%20Term"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>Term</span> <span class='hs-keyword'>where</span>
<a name="line-173"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>yield</span> <span class='hs-varop'>.</span> <span class='hs-varid'>result</span> <span class='hs-varop'>.</span> <span class='hs-varid'>result</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fmap</span>
<a name="line-174"></a> <span class='hs-keyword'>where</span>
<a name="line-175"></a> <span class='hs-varid'>yield</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Term</span> <span class='hs-varid'>ais</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Term</span> <span class='hs-varid'>ais</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-176"></a> <span class='hs-varid'>result</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varop'>.</span><span class='hs-layout'>)</span>
<a name="line-177"></a>
<a name="line-178"></a><a name="instance%20Applicative%20Term"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-conid'>Term</span> <span class='hs-keyword'>where</span>
<a name="line-179"></a> <span class='hs-varid'>pure</span> <span class='hs-varid'>v</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Term</span> <span class='hs-conid'>[]</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span>
<a name="line-180"></a>
<a name="line-181"></a> <span class='hs-layout'>(</span><span class='hs-conid'>Term</span> <span class='hs-varid'>args</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varop'><*></span> <span class='hs-layout'>(</span><span class='hs-conid'>Term</span> <span class='hs-varid'>args'</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Term</span> <span class='hs-layout'>(</span><span class='hs-varid'>args</span> <span class='hs-varop'>++</span> <span class='hs-varid'>args'</span><span class='hs-layout'>)</span> <span class='hs-varid'>wrapped</span>
<a name="line-182"></a> <span class='hs-keyword'>where</span>
<a name="line-183"></a> <span class='hs-varid'>wrapped</span> <span class='hs-varid'>ei</span> <span class='hs-varid'>cl</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>ei</span> <span class='hs-varid'>cl</span> <span class='hs-varop'><*></span> <span class='hs-varid'>v</span> <span class='hs-varid'>ei</span> <span class='hs-varid'>cl</span>
<a name="line-184"></a>
<a name="line-185"></a>
<a name="line-186"></a><a name="EvalKind"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>EvalKind</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Simple</span> <span class='hs-comment'>-- The program has no commands.</span>
<a name="line-187"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Main</span> <span class='hs-comment'>-- The default program is running.</span>
<a name="line-188"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Choice</span> <span class='hs-comment'>-- A command has been chosen.</span>
<a name="line-189"></a>
<a name="line-190"></a><a name="evalKind"></a><span class='hs-definition'>evalKind</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>EvalInfo</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EvalKind</span>
<a name="line-191"></a><span class='hs-definition'>evalKind</span> <span class='hs-varid'>ei</span>
<a name="line-192"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>choices</span> <span class='hs-varid'>ei</span> <span class='hs-varop'>==</span> <span class='hs-conid'>[]</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Simple</span>
<a name="line-193"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>fst</span> <span class='hs-layout'>(</span><span class='hs-varid'>term</span> <span class='hs-varid'>ei</span><span class='hs-layout'>)</span> <span class='hs-varop'>==</span> <span class='hs-varid'>fst</span> <span class='hs-layout'>(</span><span class='hs-varid'>main</span> <span class='hs-varid'>ei</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Main</span>
<a name="line-194"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Choice</span>
<a name="line-195"></a>
<a name="line-196"></a><a name="descCompare"></a><span class='hs-definition'>descCompare</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Ord</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-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Ordering</span>
<a name="line-197"></a><span class='hs-definition'>descCompare</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>flip</span> <span class='hs-varid'>compare</span>
<a name="line-198"></a>
<a name="line-199"></a><a name="splitOn"></a><span class='hs-definition'>splitOn</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Eq</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-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span><span class='hs-layout'>,</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-layout'>)</span>
<a name="line-200"></a><span class='hs-definition'>splitOn</span> <span class='hs-varid'>sep</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span> <span class='hs-varid'>left</span><span class='hs-layout'>,</span> <span class='hs-varid'>rest'</span> <span class='hs-layout'>)</span>
<a name="line-201"></a> <span class='hs-keyword'>where</span>
<a name="line-202"></a> <span class='hs-varid'>rest'</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>rest</span> <span class='hs-varop'>==</span> <span class='hs-conid'>[]</span> <span class='hs-keyword'>then</span> <span class='hs-varid'>rest</span> <span class='hs-keyword'>else</span> <span class='hs-varid'>tail</span> <span class='hs-varid'>rest</span> <span class='hs-comment'>-- Skip the 'sep'.</span>
<a name="line-203"></a> <span class='hs-layout'>(</span> <span class='hs-varid'>left</span><span class='hs-layout'>,</span> <span class='hs-varid'>rest</span> <span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>span</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-varid'>sep</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-204"></a>
<a name="line-205"></a><a name="select"></a><span class='hs-definition'>select</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-layout'>(</span> <span class='hs-conid'>Bool</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</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-206"></a><span class='hs-definition'>select</span> <span class='hs-varid'>baseCase</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-varid'>uncurry</span> <span class='hs-layout'>(</span><span class='hs-varop'>?</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>baseCase</span>
<a name="line-207"></a> <span class='hs-keyword'>where</span>
<a name="line-208"></a> <span class='hs-layout'>(</span><span class='hs-varop'>?</span><span class='hs-layout'>)</span> <span class='hs-conid'>True</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>const</span>
<a name="line-209"></a> <span class='hs-layout'>(</span><span class='hs-varop'>?</span><span class='hs-layout'>)</span> <span class='hs-conid'>False</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>flip</span> <span class='hs-varid'>const</span>
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