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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE TypeSynonymInstances #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-
<a name="line-3"></a>Copyright (C) 2009-2010 John MacFarlane <jgm@berkeley.edu>
<a name="line-4"></a>
<a name="line-5"></a>This program is free software; you can redistribute it and/or modify
<a name="line-6"></a>it under the terms of the GNU General Public License as published by
<a name="line-7"></a>the Free Software Foundation; either version 2 of the License, or
<a name="line-8"></a>(at your option) any later version.
<a name="line-9"></a>
<a name="line-10"></a>This program is distributed in the hope that it will be useful,
<a name="line-11"></a>but WITHOUT ANY WARRANTY; without even the implied warranty of
<a name="line-12"></a>MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
<a name="line-13"></a>GNU General Public License for more details.
<a name="line-14"></a>
<a name="line-15"></a>You should have received a copy of the GNU General Public License
<a name="line-16"></a>along with this program; if not, write to the Free Software
<a name="line-17"></a>Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
<a name="line-18"></a>-}</span>
<a name="line-19"></a>
<a name="line-20"></a><span class='hs-comment'>{- |
<a name="line-21"></a> Module : Text.Pandoc.Templates
<a name="line-22"></a> Copyright : Copyright (C) 2009-2010 John MacFarlane
<a name="line-23"></a> License : GNU GPL, version 2 or above
<a name="line-24"></a>
<a name="line-25"></a> Maintainer : John MacFarlane <jgm@berkeley.edu>
<a name="line-26"></a> Stability : alpha
<a name="line-27"></a> Portability : portable
<a name="line-28"></a>
<a name="line-29"></a>A simple templating system with variable substitution and conditionals.
<a name="line-30"></a>Example:
<a name="line-31"></a>
<a name="line-32"></a>> renderTemplate [("name","Sam"),("salary","50,000")] $
<a name="line-33"></a>> "Hi, $name$. $if(salary)$You make $$$salary$.$else$No salary data.$endif$"
<a name="line-34"></a>> "Hi, John. You make $50,000."
<a name="line-35"></a>
<a name="line-36"></a>A slot for an interpolated variable is a variable name surrounded
<a name="line-37"></a>by dollar signs. To include a literal @$@ in your template, use
<a name="line-38"></a>@$$@. Variable names must begin with a letter and can contain letters,
<a name="line-39"></a>numbers, @_@, and @-@.
<a name="line-40"></a>
<a name="line-41"></a>The value of a variable will be indented to the same level as the
<a name="line-42"></a>variable.
<a name="line-43"></a>
<a name="line-44"></a>A conditional begins with @$if(variable_name)$@ and ends with @$endif$@.
<a name="line-45"></a>It may optionally contain an @$else$@ section. The if section is
<a name="line-46"></a>used if @variable_name@ has a non-null value, otherwise the else section
<a name="line-47"></a>is used.
<a name="line-48"></a>
<a name="line-49"></a>Conditional keywords should not be indented, or unexpected spacing
<a name="line-50"></a>problems may occur.
<a name="line-51"></a>
<a name="line-52"></a>If a variable name is associated with multiple values in the association
<a name="line-53"></a>list passed to 'renderTemplate', you may use the @$for$@ keyword to
<a name="line-54"></a>iterate over them:
<a name="line-55"></a>
<a name="line-56"></a>> renderTemplate [("name","Sam"),("name","Joe")] $
<a name="line-57"></a>> "$for(name)$\nHi, $name$.\n$endfor$"
<a name="line-58"></a>> "Hi, Sam.\nHi, Joe."
<a name="line-59"></a>
<a name="line-60"></a>You may optionally specify separators using @$sep$@:
<a name="line-61"></a>
<a name="line-62"></a>> renderTemplate [("name","Sam"),("name","Joe"),("name","Lynn")] $
<a name="line-63"></a>> "Hi, $for(name)$$name$$sep$, $endfor$"
<a name="line-64"></a>> "Hi, Sam, Joe, Lynn."
<a name="line-65"></a>-}</span>
<a name="line-66"></a>
<a name="line-67"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Pandoc</span><span class='hs-varop'>.</span><span class='hs-conid'>Templates</span> <span class='hs-layout'>(</span> <span class='hs-varid'>renderTemplate</span>
<a name="line-68"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>TemplateTarget</span>
<a name="line-69"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>getDefaultTemplate</span> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-70"></a>
<a name="line-71"></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'>Parsec</span>
<a name="line-72"></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-layout'>(</span><span class='hs-varid'>liftM</span><span class='hs-layout'>,</span> <span class='hs-varid'>when</span><span class='hs-layout'>,</span> <span class='hs-varid'>forM</span><span class='hs-layout'>)</span>
<a name="line-73"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>System</span><span class='hs-varop'>.</span><span class='hs-conid'>FilePath</span>
<a name="line-74"></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'>intercalate</span><span class='hs-layout'>,</span> <span class='hs-varid'>intersperse</span><span class='hs-layout'>)</span>
<a name="line-75"></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-varid'>text</span><span class='hs-layout'>,</span> <span class='hs-conid'>Doc</span><span class='hs-layout'>)</span>
<a name="line-76"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>XHtml</span> <span class='hs-layout'>(</span><span class='hs-varid'>primHtml</span><span class='hs-layout'>,</span> <span class='hs-conid'>Html</span><span class='hs-layout'>)</span>
<a name="line-77"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>ByteString</span><span class='hs-varop'>.</span><span class='hs-conid'>Lazy</span><span class='hs-varop'>.</span><span class='hs-conid'>UTF8</span> <span class='hs-layout'>(</span><span class='hs-conid'>ByteString</span><span class='hs-layout'>,</span> <span class='hs-varid'>fromString</span><span class='hs-layout'>)</span>
<a name="line-78"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Text</span><span class='hs-varop'>.</span><span class='hs-conid'>Pandoc</span><span class='hs-varop'>.</span><span class='hs-conid'>Shared</span> <span class='hs-layout'>(</span><span class='hs-varid'>readDataFile</span><span class='hs-layout'>)</span>
<a name="line-79"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Exception</span><span class='hs-varop'>.</span><span class='hs-conid'>Extensible</span> <span class='hs-keyword'>as</span> <span class='hs-conid'>E</span> <span class='hs-layout'>(</span><span class='hs-varid'>try</span><span class='hs-layout'>,</span> <span class='hs-conid'>IOException</span><span class='hs-layout'>)</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="getDefaultTemplate"></a><span class='hs-comment'>-- | Get default template for the specified writer.</span>
<a name="line-82"></a><span class='hs-definition'>getDefaultTemplate</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-conid'>FilePath</span><span class='hs-layout'>)</span> <span class='hs-comment'>-- ^ User data directory to search first </span>
<a name="line-83"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Name of writer </span>
<a name="line-84"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IO</span> <span class='hs-layout'>(</span><span class='hs-conid'>Either</span> <span class='hs-conid'>E</span><span class='hs-varop'>.</span><span class='hs-conid'>IOException</span> <span class='hs-conid'>String</span><span class='hs-layout'>)</span>
<a name="line-85"></a><span class='hs-definition'>getDefaultTemplate</span> <span class='hs-keyword'>_</span> <span class='hs-str'>"native"</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-conid'>Right</span> <span class='hs-str'>""</span>
<a name="line-86"></a><span class='hs-definition'>getDefaultTemplate</span> <span class='hs-varid'>user</span> <span class='hs-str'>"odt"</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getDefaultTemplate</span> <span class='hs-varid'>user</span> <span class='hs-str'>"opendocument"</span>
<a name="line-87"></a><span class='hs-definition'>getDefaultTemplate</span> <span class='hs-varid'>user</span> <span class='hs-varid'>writer</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-88"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>format</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>takeWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span><span class='hs-chr'>'+'</span><span class='hs-layout'>)</span> <span class='hs-varid'>writer</span> <span class='hs-comment'>-- strip off "+lhs" if present</span>
<a name="line-89"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>fname</span> <span class='hs-keyglyph'>=</span> <span class='hs-str'>"templates"</span> <span class='hs-varop'></></span> <span class='hs-varid'>format</span> <span class='hs-varop'><.></span> <span class='hs-str'>"template"</span>
<a name="line-90"></a> <span class='hs-conid'>E</span><span class='hs-varop'>.</span><span class='hs-varid'>try</span> <span class='hs-varop'>$</span> <span class='hs-varid'>readDataFile</span> <span class='hs-varid'>user</span> <span class='hs-varid'>fname</span>
<a name="line-91"></a>
<a name="line-92"></a><a name="TemplateState"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>TemplateState</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>TemplateState</span> <span class='hs-conid'>Int</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'>String</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span>
<a name="line-93"></a>
<a name="line-94"></a><a name="adjustPosition"></a><span class='hs-definition'>adjustPosition</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>String</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-conid'>TemplateState</span> <span class='hs-conid'>String</span>
<a name="line-95"></a><span class='hs-definition'>adjustPosition</span> <span class='hs-varid'>str</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-96"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>lastline</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>takeWhile</span> <span class='hs-layout'>(</span><span class='hs-varop'>/=</span> <span class='hs-chr'>'\n'</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>reverse</span> <span class='hs-varid'>str</span>
<a name="line-97"></a> <span class='hs-varid'>updateState</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>TemplateState</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-98"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>str</span> <span class='hs-varop'>==</span> <span class='hs-varid'>lastline</span>
<a name="line-99"></a> <span class='hs-keyword'>then</span> <span class='hs-conid'>TemplateState</span> <span class='hs-layout'>(</span><span class='hs-varid'>pos</span> <span class='hs-varop'>+</span> <span class='hs-varid'>length</span> <span class='hs-varid'>lastline</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-100"></a> <span class='hs-keyword'>else</span> <span class='hs-conid'>TemplateState</span> <span class='hs-layout'>(</span><span class='hs-varid'>length</span> <span class='hs-varid'>lastline</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span>
<a name="line-101"></a> <span class='hs-varid'>return</span> <span class='hs-varid'>str</span>
<a name="line-102"></a>
<a name="line-103"></a><a name="TemplateTarget"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>TemplateTarget</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span>
<a name="line-104"></a> <span class='hs-varid'>toTarget</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-105"></a>
<a name="line-106"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>TemplateTarget</span> <span class='hs-conid'>String</span> <span class='hs-keyword'>where</span>
<a name="line-107"></a> <span class='hs-varid'>toTarget</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>id</span>
<a name="line-108"></a>
<a name="line-109"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>TemplateTarget</span> <span class='hs-conid'>ByteString</span> <span class='hs-keyword'>where</span>
<a name="line-110"></a> <span class='hs-varid'>toTarget</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fromString</span>
<a name="line-111"></a>
<a name="line-112"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>TemplateTarget</span> <span class='hs-conid'>Html</span> <span class='hs-keyword'>where</span>
<a name="line-113"></a> <span class='hs-varid'>toTarget</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>primHtml</span>
<a name="line-114"></a>
<a name="line-115"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>TemplateTarget</span> <span class='hs-conid'>Doc</span> <span class='hs-keyword'>where</span>
<a name="line-116"></a> <span class='hs-varid'>toTarget</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>text</span>
<a name="line-117"></a>
<a name="line-118"></a><a name="renderTemplate"></a><span class='hs-comment'>-- | Renders a template </span>
<a name="line-119"></a><span class='hs-definition'>renderTemplate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>TemplateTarget</span> <span class='hs-varid'>a</span>
<a name="line-120"></a> <span class='hs-keyglyph'>=></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'>String</span><span class='hs-layout'>)</span><span class='hs-keyglyph'>]</span> <span class='hs-comment'>-- ^ Assoc. list of values for variables</span>
<a name="line-121"></a> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>String</span> <span class='hs-comment'>-- ^ Template</span>
<a name="line-122"></a> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-123"></a><span class='hs-definition'>renderTemplate</span> <span class='hs-varid'>vals</span> <span class='hs-varid'>templ</span> <span class='hs-keyglyph'>=</span>
<a name="line-124"></a> <span class='hs-keyword'>case</span> <span class='hs-varid'>runParser</span> <span class='hs-layout'>(</span><span class='hs-keyword'>do</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>parseTemplate</span><span class='hs-layout'>;</span> <span class='hs-varid'>eof</span><span class='hs-layout'>;</span> <span class='hs-varid'>return</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>TemplateState</span> <span class='hs-num'>0</span> <span class='hs-varid'>vals</span><span class='hs-layout'>)</span> <span class='hs-str'>"template"</span> <span class='hs-varid'>templ</span> <span class='hs-keyword'>of</span>
<a name="line-125"></a> <span class='hs-conid'>Left</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>error</span> <span class='hs-varop'>$</span> <span class='hs-varid'>show</span> <span class='hs-varid'>e</span>
<a name="line-126"></a> <span class='hs-conid'>Right</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>toTarget</span> <span class='hs-varop'>$</span> <span class='hs-varid'>concat</span> <span class='hs-varid'>r</span>
<a name="line-127"></a>
<a name="line-128"></a><a name="reservedWords"></a><span class='hs-definition'>reservedWords</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-129"></a><span class='hs-definition'>reservedWords</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyglyph'>[</span><span class='hs-str'>"else"</span><span class='hs-layout'>,</span><span class='hs-str'>"endif"</span><span class='hs-layout'>,</span><span class='hs-str'>"for"</span><span class='hs-layout'>,</span><span class='hs-str'>"endfor"</span><span class='hs-layout'>,</span><span class='hs-str'>"sep"</span><span class='hs-keyglyph'>]</span>
<a name="line-130"></a>
<a name="line-131"></a><a name="parseTemplate"></a><span class='hs-definition'>parseTemplate</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-conid'>TemplateState</span> <span class='hs-keyglyph'>[</span><span class='hs-conid'>String</span><span class='hs-keyglyph'>]</span>
<a name="line-132"></a><span class='hs-definition'>parseTemplate</span> <span class='hs-keyglyph'>=</span>
<a name="line-133"></a> <span class='hs-varid'>many</span> <span class='hs-varop'>$</span> <span class='hs-layout'>(</span><span class='hs-varid'>plaintext</span> <span class='hs-varop'><|></span> <span class='hs-varid'>escapedDollar</span> <span class='hs-varop'><|></span> <span class='hs-varid'>conditional</span> <span class='hs-varop'><|></span> <span class='hs-varid'>for</span> <span class='hs-varop'><|></span> <span class='hs-varid'>variable</span><span class='hs-layout'>)</span>
<a name="line-134"></a> <span class='hs-varop'>>>=</span> <span class='hs-varid'>adjustPosition</span>
<a name="line-135"></a>
<a name="line-136"></a><a name="plaintext"></a><span class='hs-definition'>plaintext</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-conid'>TemplateState</span> <span class='hs-conid'>String</span>
<a name="line-137"></a><span class='hs-definition'>plaintext</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>many1</span> <span class='hs-varop'>$</span> <span class='hs-varid'>noneOf</span> <span class='hs-str'>"$"</span>
<a name="line-138"></a>
<a name="line-139"></a><a name="escapedDollar"></a><span class='hs-definition'>escapedDollar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-conid'>TemplateState</span> <span class='hs-conid'>String</span>
<a name="line-140"></a><span class='hs-definition'>escapedDollar</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>try</span> <span class='hs-varop'>$</span> <span class='hs-varid'>string</span> <span class='hs-str'>"$$"</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-str'>"$"</span>
<a name="line-141"></a>
<a name="line-142"></a><a name="skipEndline"></a><span class='hs-definition'>skipEndline</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-varid'>st</span> <span class='hs-conid'>()</span>
<a name="line-143"></a><span class='hs-definition'>skipEndline</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>try</span> <span class='hs-varop'>$</span> <span class='hs-varid'>skipMany</span> <span class='hs-layout'>(</span><span class='hs-varid'>oneOf</span> <span class='hs-str'>" \t"</span><span class='hs-layout'>)</span> <span class='hs-varop'>>></span> <span class='hs-varid'>newline</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>()</span>
<a name="line-144"></a>
<a name="line-145"></a><a name="conditional"></a><span class='hs-definition'>conditional</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-conid'>TemplateState</span> <span class='hs-conid'>String</span>
<a name="line-146"></a><span class='hs-definition'>conditional</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>try</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-147"></a> <span class='hs-conid'>TemplateState</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>vars</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getState</span>
<a name="line-148"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"$if("</span>
<a name="line-149"></a> <span class='hs-varid'>id'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ident</span>
<a name="line-150"></a> <span class='hs-varid'>string</span> <span class='hs-str'>")$"</span>
<a name="line-151"></a> <span class='hs-comment'>-- if newline after the "if", then a newline after "endif" will be swallowed</span>
<a name="line-152"></a> <span class='hs-varid'>multiline</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>option</span> <span class='hs-conid'>False</span> <span class='hs-varop'>$</span> <span class='hs-varid'>try</span> <span class='hs-varop'>$</span> <span class='hs-varid'>skipEndline</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>True</span>
<a name="line-153"></a> <span class='hs-varid'>ifContents</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>liftM</span> <span class='hs-varid'>concat</span> <span class='hs-varid'>parseTemplate</span>
<a name="line-154"></a> <span class='hs-comment'>-- reset state for else block</span>
<a name="line-155"></a> <span class='hs-varid'>setState</span> <span class='hs-varop'>$</span> <span class='hs-conid'>TemplateState</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>vars</span>
<a name="line-156"></a> <span class='hs-varid'>elseContents</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>option</span> <span class='hs-str'>""</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>try</span> <span class='hs-layout'>(</span><span class='hs-varid'>string</span> <span class='hs-str'>"$else$"</span><span class='hs-layout'>)</span>
<a name="line-157"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>multiline</span> <span class='hs-varop'>$</span> <span class='hs-varid'>optional</span> <span class='hs-varid'>skipEndline</span>
<a name="line-158"></a> <span class='hs-varid'>liftM</span> <span class='hs-varid'>concat</span> <span class='hs-varid'>parseTemplate</span>
<a name="line-159"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"$endif$"</span>
<a name="line-160"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>multiline</span> <span class='hs-varop'>$</span> <span class='hs-varid'>optional</span> <span class='hs-varid'>skipEndline</span>
<a name="line-161"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>conditionSatisfied</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>lookup</span> <span class='hs-varid'>id'</span> <span class='hs-varid'>vars</span> <span class='hs-keyword'>of</span>
<a name="line-162"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>False</span>
<a name="line-163"></a> <span class='hs-conid'>Just</span> <span class='hs-str'>""</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>False</span>
<a name="line-164"></a> <span class='hs-conid'>Just</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>True</span>
<a name="line-165"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>if</span> <span class='hs-varid'>conditionSatisfied</span>
<a name="line-166"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>ifContents</span>
<a name="line-167"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>elseContents</span>
<a name="line-168"></a>
<a name="line-169"></a><a name="for"></a><span class='hs-definition'>for</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-conid'>TemplateState</span> <span class='hs-conid'>String</span>
<a name="line-170"></a><span class='hs-definition'>for</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>try</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-171"></a> <span class='hs-conid'>TemplateState</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>vars</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getState</span>
<a name="line-172"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"$for("</span>
<a name="line-173"></a> <span class='hs-varid'>id'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ident</span>
<a name="line-174"></a> <span class='hs-varid'>string</span> <span class='hs-str'>")$"</span>
<a name="line-175"></a> <span class='hs-comment'>-- if newline after the "for", then a newline after "endfor" will be swallowed</span>
<a name="line-176"></a> <span class='hs-varid'>multiline</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>option</span> <span class='hs-conid'>False</span> <span class='hs-varop'>$</span> <span class='hs-varid'>try</span> <span class='hs-varop'>$</span> <span class='hs-varid'>skipEndline</span> <span class='hs-varop'>>></span> <span class='hs-varid'>return</span> <span class='hs-conid'>True</span>
<a name="line-177"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>matches</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>filter</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-varid'>k</span><span class='hs-layout'>,</span><span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>k</span> <span class='hs-varop'>==</span> <span class='hs-varid'>id'</span><span class='hs-layout'>)</span> <span class='hs-varid'>vars</span>
<a name="line-178"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>indent</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>replicate</span> <span class='hs-varid'>pos</span> <span class='hs-chr'>' '</span>
<a name="line-179"></a> <span class='hs-varid'>contents</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>forM</span> <span class='hs-varid'>matches</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>m</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>do</span>
<a name="line-180"></a> <span class='hs-varid'>updateState</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-layout'>(</span><span class='hs-conid'>TemplateState</span> <span class='hs-varid'>p</span> <span class='hs-varid'>v</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>TemplateState</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span><span class='hs-conop'>:</span><span class='hs-varid'>v</span><span class='hs-layout'>)</span>
<a name="line-181"></a> <span class='hs-varid'>raw</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>liftM</span> <span class='hs-varid'>concat</span> <span class='hs-varop'>$</span> <span class='hs-varid'>lookAhead</span> <span class='hs-varid'>parseTemplate</span>
<a name="line-182"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>intercalate</span> <span class='hs-layout'>(</span><span class='hs-chr'>'\n'</span><span class='hs-conop'>:</span><span class='hs-varid'>indent</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>lines</span> <span class='hs-varop'>$</span> <span class='hs-varid'>raw</span> <span class='hs-varop'>++</span> <span class='hs-str'>"\n"</span>
<a name="line-183"></a> <span class='hs-varid'>parseTemplate</span>
<a name="line-184"></a> <span class='hs-varid'>sep</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>option</span> <span class='hs-str'>""</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span> <span class='hs-varid'>try</span> <span class='hs-layout'>(</span><span class='hs-varid'>string</span> <span class='hs-str'>"$sep$"</span><span class='hs-layout'>)</span>
<a name="line-185"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>multiline</span> <span class='hs-varop'>$</span> <span class='hs-varid'>optional</span> <span class='hs-varid'>skipEndline</span>
<a name="line-186"></a> <span class='hs-varid'>liftM</span> <span class='hs-varid'>concat</span> <span class='hs-varid'>parseTemplate</span>
<a name="line-187"></a> <span class='hs-varid'>string</span> <span class='hs-str'>"$endfor$"</span>
<a name="line-188"></a> <span class='hs-varid'>when</span> <span class='hs-varid'>multiline</span> <span class='hs-varop'>$</span> <span class='hs-varid'>optional</span> <span class='hs-varid'>skipEndline</span>
<a name="line-189"></a> <span class='hs-varid'>setState</span> <span class='hs-varop'>$</span> <span class='hs-conid'>TemplateState</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>vars</span>
<a name="line-190"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-varid'>concat</span> <span class='hs-varop'>$</span> <span class='hs-varid'>intersperse</span> <span class='hs-varid'>sep</span> <span class='hs-varid'>contents</span>
<a name="line-191"></a>
<a name="line-192"></a><a name="ident"></a><span class='hs-definition'>ident</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-conid'>TemplateState</span> <span class='hs-conid'>String</span>
<a name="line-193"></a><span class='hs-definition'>ident</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>do</span>
<a name="line-194"></a> <span class='hs-varid'>first</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>letter</span>
<a name="line-195"></a> <span class='hs-varid'>rest</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>many</span> <span class='hs-layout'>(</span><span class='hs-varid'>alphaNum</span> <span class='hs-varop'><|></span> <span class='hs-varid'>oneOf</span> <span class='hs-str'>"_-"</span><span class='hs-layout'>)</span>
<a name="line-196"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>id'</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>first</span> <span class='hs-conop'>:</span> <span class='hs-varid'>rest</span>
<a name="line-197"></a> <span class='hs-keyword'>if</span> <span class='hs-varid'>id'</span> <span class='hs-varop'>`elem`</span> <span class='hs-varid'>reservedWords</span>
<a name="line-198"></a> <span class='hs-keyword'>then</span> <span class='hs-varid'>pzero</span>
<a name="line-199"></a> <span class='hs-keyword'>else</span> <span class='hs-varid'>return</span> <span class='hs-varid'>id'</span>
<a name="line-200"></a>
<a name="line-201"></a><a name="variable"></a><span class='hs-definition'>variable</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>GenParser</span> <span class='hs-conid'>Char</span> <span class='hs-conid'>TemplateState</span> <span class='hs-conid'>String</span>
<a name="line-202"></a><span class='hs-definition'>variable</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>try</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-203"></a> <span class='hs-varid'>char</span> <span class='hs-chr'>'$'</span>
<a name="line-204"></a> <span class='hs-varid'>id'</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ident</span>
<a name="line-205"></a> <span class='hs-varid'>char</span> <span class='hs-chr'>'$'</span>
<a name="line-206"></a> <span class='hs-conid'>TemplateState</span> <span class='hs-varid'>pos</span> <span class='hs-varid'>vars</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>getState</span>
<a name="line-207"></a> <span class='hs-keyword'>let</span> <span class='hs-varid'>indent</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>replicate</span> <span class='hs-varid'>pos</span> <span class='hs-chr'>' '</span>
<a name="line-208"></a> <span class='hs-varid'>return</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>lookup</span> <span class='hs-varid'>id'</span> <span class='hs-varid'>vars</span> <span class='hs-keyword'>of</span>
<a name="line-209"></a> <span class='hs-conid'>Just</span> <span class='hs-varid'>val</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>intercalate</span> <span class='hs-layout'>(</span><span class='hs-chr'>'\n'</span> <span class='hs-conop'>:</span> <span class='hs-varid'>indent</span><span class='hs-layout'>)</span> <span class='hs-varop'>$</span> <span class='hs-varid'>lines</span> <span class='hs-varid'>val</span>
<a name="line-210"></a> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>-></span> <span class='hs-str'>""</span>
</pre></body>
</html>
