<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE language SYSTEM "language.dtd">
<!--
========================================================================
YACC.XML supports syntax highlighting for Yacc/Bison source under Kate.

Copyright (C) 2004, Jan Villat <jan.villat@net2000.ch>
This code is released under the LGPL as part of tdelibs/kate.
========================================================================


== UPDATE HISTORY ==
2018-02-20 // Nibaldo González <nibgonz@gmail.com>

  Fix '$' symbol, highlighted as 'dsError' by C++ (isocpp.xml). 
  Update syntax for Bison (3.0.4):
   - Add declarations, directives in rules and the '@' variable.
   - Allow a tag in '%union', declarations in multiple lines and 
     grammar declarations in the grammar rules section.
   - The ';' char is not necessary to finish a rule. Allow '; |' 
     within rules.
  Add mimetypes and extensions '*.ypp' & '*.y++'.

2007-10-01 // Sebastian Pipping <webmaster@hartwork.org>

  Added: Extension "*.yy" for Bison

2004-05-26 // Jan Villat <jan.villat@net2000.ch>

  YACC.XML 1.00 - First released.


========================================================================
-->
<language name="Yacc/Bison" version="4-1" kateversion="2.4" section="Sources" extensions="*.y;*.yy;*.ypp;*.y++" mimetype="text/x-yacc;text/x-bison" priority="5" author="Jan Villat (jan.villat@net2000.ch)" license="LGPL">

<highlighting>
<contexts>
  <context name="Pre Start" attribute="Normal Text" lineEndContext="#stay">
    <IncludeRules context="Comment" />
    <DetectSpaces />
    <Detect2Chars attribute="Content-Type Delimiter" context="C Declarations" char="%" char1="{" beginRegion="cdeclarations" column="0" />
    <RegExpr attribute="Normal Text" context="Declarations" String="." beginRegion="declarations" lookAhead="true" />
  </context>

  <context name="C Declarations" attribute="Normal Text" lineEndContext="#stay">
    <IncludeRules context="Comment" />
    <Detect2Chars attribute="Content-Type Delimiter" context="#pop" char="%" char1="}" endRegion="cdeclarations" column="0" />
    <IncludeRules context="##C++" />
  </context>

  <context name="Declarations" attribute="Normal Text" lineEndContext="#stay">
    <IncludeRules context="Comment" />
    <Detect2Chars attribute="Content-Type Delimiter" context="Rules" char="%" char1="%" beginRegion="rules" endRegion="declarations" />
    <!-- Prologue Declarations -->
    <Detect2Chars attribute="Content-Type Delimiter" context="C Declarations" char="%" char1="{" beginRegion="cdeclarations" column="0" />
    <IncludeRules context="Grammar Declarations" />
    <WordDetect attribute="Directive" context="Code-Symbols Start" String="%initial-action" />
    <WordDetect attribute="Directive" context="Code-Symbols Start" String="%param" />
    <WordDetect attribute="Directive" context="Code-Symbols Start" String="%lex-param" />
    <WordDetect attribute="Directive" context="Code-Symbols Start" String="%parse-param" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%&lt;flag&gt;" />
    <!-- Any word followed by '%' (End with ';' or '%') -->
    <DetectChar attribute="Directive" context="Percent Command" char="%" />
  </context>  
  <context name="Grammar Declarations" attribute="Normal Text" lineEndContext="#stay">
    <WordDetect attribute="Directive" context="Union Start" String="%union" />
    <WordDetect attribute="Directive" context="Union Start" String="%code" />
    <WordDetect attribute="Directive" context="Code-Symbols Start" String="%destructor" />
    <WordDetect attribute="Directive" context="Code-Symbols Start" String="%printer" />
  </context>

  <context name="Union Start" attribute="Normal Text" lineEndContext="#stay">
    <IncludeRules context="Comment" />
    <DetectSpaces />
    <DetectChar attribute="Normal Text" context="Union In" char="{" beginRegion="union" />
    <RegExpr attribute="Normal Text" context="#pop!Union Tag" String="[^\s\{](?=(\s|$|//))" />
  </context>
  <context name="Union Tag" attribute="Normal Text" lineEndContext="#stay">
    <IncludeRules context="Comment" />
    <DetectSpaces />
    <DetectChar attribute="Normal Text" context="Union In" char="{" beginRegion="union" />
    <RegExpr attribute="Alert" context="#pop" String="." />
  </context>
  <context name="Union In" attribute="Normal Text" lineEndContext="#stay">
    <DetectChar attribute="Normal Text" context="Union InIn" char="{" />
    <DetectChar attribute="Normal Text" context="#pop#pop" char="}" endRegion="union" />
    <IncludeRules context="##C++" />
  </context>
  <context name="Union InIn" attribute="Normal Text" lineEndContext="#stay">
    <DetectChar attribute="Normal Text" context="Union InIn" char="{" />
    <DetectChar attribute="Normal Text" context="#pop" char="}" />
    <IncludeRules context="##C++" />
  </context>

  <!-- '%'<decl> ('{' <Code-Symbols In> '}')+ <Percent Command In> [';'] -->
  <context name="Code-Symbols Start" attribute="Normal Text" lineEndContext="#stay">
    <IncludeRules context="Comment" />
    <DetectSpaces />
    <DetectChar attribute="Normal Text" context="Code-Symbols In" char="{" beginRegion="code-symbols" />
    <RegExpr attribute="Alert" context="#pop" String="." />
  </context>
  <context name="Code-Symbols In" attribute="Normal Text" lineEndContext="#stay">
    <DetectChar attribute="Normal Text" context="#pop#pop!Code-Symbols End" char="}" endRegion="code-symbols" />
    <DetectChar attribute="Normal Text" context="Code-Symbols InIn" char="{" />
    <IncludeRules context="Symbol-Variable" />
    <IncludeRules context="##C++" />
  </context>
  <context name="Code-Symbols InIn" attribute="Normal Text" lineEndContext="#stay">
    <DetectChar attribute="Normal Text" context="Code-Symbols InIn" char="{" />
    <DetectChar attribute="Normal Text" context="#pop" char="}" />
    <IncludeRules context="Symbol-Variable" />
    <IncludeRules context="##C++" />
  </context>
  <context name="Code-Symbols End" attribute="Normal Text" lineEndContext="#stay" fallthrough="true" fallthroughContext="#pop!Percent Command In">
    <IncludeRules context="Comment" />
    <DetectSpaces />
    <DetectChar attribute="Normal Text" context="#pop" char=";" lookAhead="true" />
    <DetectChar attribute="Normal Text" context="Code-Symbols In" char="{" beginRegion="code-symbols" />
  </context>

  <context name="Rules" attribute="Rule" lineEndContext="#stay">
    <IncludeRules context="Comment" />
    <Detect2Chars attribute="Content-Type Delimiter" context="User Code" char="%" char1="%" beginRegion="code" endRegion="rules" />
    <DetectChar attribute="Normal Text" context="Rule In" char=":" beginRegion="rule" />
    <DetectChar attribute="Rule" context="Grammar Declaration Start" char="%" lookAhead="true" />
  </context>

  <context name="Rule In" attribute="Definition" lineEndContext="#stay">
    <IncludeRules context="Comment" />
    <DetectChar attribute="Normal Text" context="Rule End" char=";" endRegion="rule" />
    <DetectChar attribute="Normal Text" context="Normal C Bloc" char="{" beginRegion="bloc" />
    <DetectChar attribute="Normal Text" context="#stay" char="|" />
    <IncludeRules context="StringOrChar" />
    <RegExpr attribute="Directive" context="#stay" String="%\?(?=\{)" />
    <WordDetect attribute="Directive" context="#stay" String="%empty" />
    <WordDetect attribute="Directive" context="#stay" String="%prec" />
    <WordDetect attribute="Directive" context="#stay" String="%dprec" />
    <WordDetect attribute="Directive" context="#stay" String="%merge" />

    <!-- Finish rule without the ';' character (see the 'rhses.1' rule in the 'src/parse-gram.y' file, from the Bison source) -->
    <RegExpr attribute="Open Rule" context="#pop" String="[\w\-\.](?=[\w\-\.]*:)" column="0" endRegion="rule" />
    <Detect2Chars attribute="Content-Type Delimiter" context="#pop" char="%" char1="%" lookAhead="true" firstNonSpace="true" endRegion="rule" />
    <RegExpr attribute="Directive" context="#pop" String="%(union|code|destructor|printer|start|(no\-)?default\-prec|nterm|token|type|left|right|nonassoc|precedence)\b" lookAhead="true" column="0" endRegion="rule" />
  </context>
  <!-- The Bison parser allows to have ';' followed by '|', without the rule ending. 
       The problem here is that the ';' char has endRegion="rule" (although it is not very relevant). -->
  <context name="Rule End" attribute="Normal Text" lineEndContext="#stay" fallthrough="true" fallthroughContext="#pop#pop">
    <DetectSpaces />
    <DetectChar attribute="Normal Text" context="#stay" char=";" />
    <DetectChar attribute="Normal Text" context="#pop" char="|" />
    <IncludeRules context="Comment" />
  </context>

  <context name="Grammar Declaration Start" attribute="Normal Text" lineEndContext="#stay">
    <!-- In the rules section, only highlighting exact declarations -->
    <IncludeRules context="Grammar Declarations" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%start" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%default-prec" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%no-default-prec" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%nterm" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%token" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%type" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%left" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%right" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%nonassoc" />
    <WordDetect attribute="Directive" context="Percent Command In" String="%precedence" /> 

    <DetectChar attribute="Rule" context="#pop" char="%" /> <!-- End when there is an invalid declaration -->
    <DetectChar attribute="Normal Text" context="#pop" char=";" />
    <IncludeRules context="Comment" />
    <DetectSpaces />
    <RegExpr attribute="Alert" context="#pop" String=".+" />
  </context>

  <context name="User Code" attribute="Normal Text" lineEndContext="#stay">
    <IncludeRules context="##C++" />
  </context>

  <context name="Percent Command" attribute="Directive" lineEndContext="#pop!Percent Command In">
    <IncludeRules context="Comment" />
    <RegExpr attribute="Normal Text" context="#pop!Percent Command In" String="[^\w\-]" lookAhead="true" />
  </context>
  <context name="Percent Command In" attribute="Normal Text" lineEndContext="#stay">
    <!-- This can be applied to multiple lines -->
    <DetectChar attribute="Normal Text" context="#pop" char=";" lookAhead="true" />
    <DetectChar attribute="Normal Text" context="#pop" char="%" lookAhead="true" firstNonSpace="true" />
    <Detect2Chars attribute="Normal Text" context="#pop" char="%" char1="%" lookAhead="true" />
    <IncludeRules context="StringOrChar" />
    <DetectChar attribute="Data Type" context="PC type" char="&lt;" />
    <IncludeRules context="Comment" />
  </context>
  <context name="PC type" attribute="Data Type" lineEndContext="#pop#pop">
    <DetectChar attribute="Data Type" context="#pop" char="&gt;" />
  </context>

  <context name="Comment" attribute="Comment" lineEndContext="#stay">
    <Detect2Chars attribute="Comment" context="CommentStar" char="/" char1="*" />
    <Detect2Chars attribute="Comment" context="CommentSlash" char="/" char1="/" />
  </context>
  <context name="CommentStar" attribute="Comment" lineEndContext="#stay">
    <Detect2Chars attribute="Comment" context="#pop" char="*" char1="/" />
  </context>
  <context name="CommentSlash" attribute="Comment" lineEndContext="#stay">
    <RegExpr attribute="Comment" context="#pop" String="[^\\]$" />
  </context>

  <context name="StringOrChar" attribute="Normal Text" lineEndContext="#stay">
    <DetectChar attribute="String Char" context="Char" char="'" />
    <DetectChar attribute="String" context="String" char="&quot;" />
  </context>
  <context name="String" attribute="String" lineEndContext="#pop">
    <RegExpr attribute="Backslash Code" context="#stay" String="\\." />
    <DetectChar attribute="String" context="#pop" char="&quot;" />
  </context>
  <context name="Char" attribute="String Char" lineEndContext="#pop">
    <RegExpr attribute="Backslash Code" context="#stay" String="\\." />
    <DetectChar attribute="String Char" context="#pop" char="'" />
  </context>

  <context name="Normal C Bloc" attribute="Normal Text" lineEndContext="#stay">
    <DetectChar attribute="Normal Text" context="Normal C Bloc" char="{" beginRegion="bloc" />
    <DetectChar attribute="Normal Text" context="#pop" char="}" endRegion="bloc" />
    <IncludeRules context="Symbol-Variable" />
    <IncludeRules context="##C++" />
  </context>
  <context name="Symbol-Variable" attribute="Normal Text" lineEndContext="#stay">
    <DetectChar attribute="Directive" context="Dol" char="$" />
    <RegExpr attribute="Directive" context="#stay" String="@(\$?)(\d+|[A-Za-z_]\w*)?" />
  </context>
  <context name="Dol" attribute="Normal Text" fallthrough="true" fallthroughContext="DolEnd" lineEndContext="#stay">
    <RegExpr attribute="Data Type" context="DolEnd" String="&lt;[^&gt;]+&gt;" />
  </context>
  <context name="DolEnd" attribute="Normal Text" lineEndContext="#stay" fallthrough="true" fallthroughContext="#pop#pop">
    <RegExpr attribute="Directive" context="#pop#pop" String="@?\d+" />
    <DetectChar attribute="Directive" context="#pop#pop" char="$" />
    <DetectIdentifier attribute="Directive" context="#pop#pop" />
  </context>
</contexts>

<itemDatas>
  <itemData name="Normal Text" defStyleNum="dsNormal" />
  <itemData name="Definition" defStyleNum="dsNormal" />
  <itemData name="Comment" defStyleNum="dsComment" />
  <itemData name="Content-Type Delimiter" defStyleNum="dsBaseN" bold="1" />
  <itemData name="Directive" defStyleNum="dsKeyword"/>
  <itemData name="Rule" defStyleNum="dsString" />
  <itemData name="Open Rule" defStyleNum="dsString" bold="1" />
  <itemData name="Backslash Code" defStyleNum="dsString" bold="1" />
  <itemData name="Alert" defStyleNum="dsAlert" />
  <itemData name="String" defStyleNum="dsString"/>
  <itemData name="String Char" defStyleNum="dsChar"/>
  <itemData name="Data Type" defStyleNum="dsDataType"/>
</itemDatas>

</highlighting>
<general>
  <comments>
    <comment name="multiLine" start="/*" end="*/" />
    <comment name="singleLine" start="//" />
  </comments>
</general>
</language>
<!-- kate: space-indent on; indent-width 2; replace-tabs on; -->
