<?xml version="1.0" encoding="UTF-8"?>
<!--

 This file is part of GtkSourceView

 Author: Archit Baweja <bighead@users.sourceforge.net>
 Copyright (C) 2004 Archit Baweja <bighead@users.sourceforge.net>
 Copyright (C) 2005 Michael Witrant <mike@lepton.fr>
 Copyright (C) 2006 Gabriel Bauman <gabe@codehaus.org>
 Copyright (C) 2013 Jesse van den Kieboom <jessevdk@gnome.org>
 Copyright (C) 2019 Yukihiro Nakai

 GtkSourceView is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 GtkSourceView is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public License
 along with this library; if not, see <http://www.gnu.org/licenses/>.

-->
<language id="ruby" name="Ruby" version="2.0" _section="Script">
  <metadata>
    <property name="mimetypes">application/x-ruby;text/x-ruby</property>
    <property name="globs">*.rb;*.rake;*.gemspec;Rakefile;Capfile;Gemfile</property>
    <property name="line-comment-start">#</property>
  </metadata>

  <styles>
    <style id="escape"               name="Escaped Character"     map-to="def:special-char"/>
    <style id="comment"              name="Comment"               map-to="def:comment"/>
    <style id="attribute-definition" name="Attribute Definition"  map-to="def:statement"/>
    <style id="module-handler"       name="Module handler"        map-to="def:preprocessor"/>
    <style id="keyword"              name="Keyword"               map-to="def:keyword"/>
    <style id="nil-value"            name="Nil Constant"          map-to="def:special-constant"/>
    <style id="boolean"              name="Boolean value"         map-to="def:boolean"/>
    <style id="floating-point"       name="Floating point number" map-to="def:floating-point"/>
    <style id="decimal"              name="Decimal number"        map-to="def:decimal"/>
    <style id="base-n-integer"       name="Base-N number"         map-to="def:base-n-integer"/>
    <style id="numeric-literal"      name="Numeric literal"       map-to="def:base-n-integer"/>
    <style id="character-literal"    name="Character literal"     map-to="def:string"/>
    <style id="string"               name="String"                map-to="def:string"/>
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    <style id="regex"                name="Regular Expression"    map-to="def:identifier"/>
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    <define-regex id="unicode-escape" extended="true">
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      (?:
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        \s* }
      )
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    <define-regex id="meta-control-escape" extended="true">
      (?&lt;! \\c | \\C- | \\M- )
      \\
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        c  (?: \\M- )? |
        C- (?: \\M- )? |
        M- (?: \\c | \\C- )?
      )
      (?: \%{simple-escape} | [^\\] )
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    <define-regex id="escape" extended="true">
      (?: \%{unicode-escape} | \%{meta-control-escape} | \%{simple-escape} )
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    <context id="escape" style-ref="escape">
      <match>\%{escape}</match>
    </context>

    <context id="multiline-comment" style-ref="comment" class="comment" class-disabled="no-spell-check">
      <start>^=begin</start>
      <end>^=end</end>
      <include>
        <context ref="escape"/>
        <context ref="def:in-comment"/>
      </include>
    </context>

    <context id="attribute-definitions" style-ref="attribute-definition">
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      <keyword>attr_writer</keyword>
      <keyword>attr_reader</keyword>
      <keyword>attr_accessor</keyword>
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    <context id="definitions" style-ref="keyword">
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    <context id="keywords" style-ref="keyword">
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      <keyword>Object</keyword>
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      <keyword>Observable</keyword>
      <keyword>PStore::Error</keyword>
      <keyword>PStore</keyword>
      <keyword>Pathname</keyword>
      <keyword>Precision</keyword>
      <keyword>Proc</keyword>
      <keyword>Process::GID</keyword>
      <keyword>Process::Status</keyword>
      <keyword>Process::Sys</keyword>
      <keyword>Process::UID</keyword>
      <keyword>Process</keyword>
      <keyword>Queue</keyword>
      <keyword>RUBY_PLATFORM</keyword>
      <keyword>RUBY_RELEASE_DATE</keyword>
      <keyword>RUBY_VERSION</keyword>
      <keyword>Range</keyword>
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      <keyword>Rational</keyword>
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      <keyword>STDERR</keyword>
      <keyword>STDIN</keyword>
      <keyword>STDOUT</keyword>
      <keyword>ScriptError</keyword>
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      <keyword>StringIO</keyword>
      <keyword>StringScanner::Error</keyword>
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      <keyword>SyncEnumerator</keyword>
      <keyword>SyntaxError</keyword>
      <keyword>SystemCallError</keyword>
      <keyword>SystemExit</keyword>
      <keyword>SystemStackError</keyword>
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      <keyword>Test::Unit</keyword>
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      <keyword>Zlib::NeedDict</keyword>
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      <keyword>Zlib::StreamError</keyword>
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      <keyword>Zlib</keyword>
      <keyword>fatal</keyword>
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      <keyword>__FILE__</keyword>
      <keyword>__LINE__</keyword>
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      <match extended="true">
        \$([!$&amp;"'*+,./0:;&lt;=&gt;?@\`~1-9]|
           -[0FIKadilpvw]|
           (deferr|defout|stderr|stdin|stdout|
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    <context id="global-variables" style-ref="variable">
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    <context id="regexp-variables" style-ref="regex">
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    </context>

    <context id="constants" style-ref="constant">
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    </context>

    <context id="nil-value" style-ref="nil-value">
      <keyword>NIL</keyword>
      <keyword>nil</keyword>
    </context>

    <context id="boolean" style-ref="boolean">
      <keyword>FALSE</keyword>
      <keyword>TRUE</keyword>
      <keyword>false</keyword>
      <keyword>true</keyword>
    </context>

    <define-regex id="underscore_num">\d(_?\d)*</define-regex>

    <define-regex id="float" extended="true">
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      ( (\%{underscore_num}(\.\%{underscore_num})?)[eE][+-]?\%{underscore_num} )
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    <context id="hex" style-ref="base-n-integer">
      <match>(?&lt;!\.\.\.\.)((?&lt;![\w\.])|(?&lt;=\.\.))0[xX][0-9A-Fa-f](_?[0-9A-Fa-f])*((?![\w\.])|(?=\.\.)|(?=\.[a-zA-Z_]))(?!\.\.\.\.)</match>
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    <context id="octal" style-ref="base-n-integer">
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    </context>

    <!-- in double quotes and backticks -->
    <context id="simple-interpolation">
      <start>#(?=[@$])</start> <!-- need assertion to not highlight single # -->
      <end></end>
      <include>
        <context ref="class-variables"/>
        <context ref="instance-variables"/>
        <context ref="global-variables"/>
      </include>
    </context>

    <!-- in double quotes and backticks -->
    <!-- FIXME: really would like for the syntax highlight to go back
         to none here, as any ruby code could go here -->
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      <start>#{</start>
      <end>}</end>
      <include>
        <context ref="ruby:*"/>
      </include>
    </context>

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        <context ref="def:line-continue"/>
        <context ref="complex-interpolation"/>
        <context ref="simple-interpolation"/>
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         (parts lifted from perl.lang) -->
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          <end>\)</end>
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              <end>]</end>
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          <end>}</end>
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            <context ref="inside-interpolated-string"/>
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        <context style-ref="string" style-inside="true">
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            <context where="end" sub-pattern="0" style-ref="literal"/>

            <context style-ref="escape">
              <match>\\['\\]</match>
            </context>
            <context>
              <start>&lt;</start>
              <end>&gt;</end>
            </context>
          </include>
        </context>

        <context style-ref="string" style-inside="true">
          <start>[%][qsw]([^[:alnum:]{&lt;[(])</start>
          <end>\%{1@start}</end>
          <include>
            <context where="start" sub-pattern="0" style-ref="literal"/>
            <context where="end" sub-pattern="0" style-ref="literal"/>

            <context style-ref="escape">
              <match>\\['\\]</match>
            </context>
          </include>
        </context>
      </include>
    </context>

    <define-regex id="regex-opts">[iomx]*[neus]?[iomx]*</define-regex>

    <context id="regex-bracketed" style-ref="escape" style-inside="true">
      <start>(?&lt;!\\)[[]</start>
      <end>(?&lt;!\\)]</end>
    </context>

    <context id="regex-alt-form" style-ref="regex">
      <start>\%r\|</start>
      <end>\|\%{regex-opts}</end>
      <include>
        <context ref="escape"/>
        <context ref="def:line-continue"/>
        <context ref="complex-interpolation"/>
        <context ref="simple-interpolation"/>
        <context ref="regex-bracketed"/>
       </include>
     </context>

    <context id="regex-simple" style-ref="regex">
      <start extended="true">
        ((?&lt;=([(]|\s))|^)
        \/
        (?=
          ([^/\\]*(\\.))*
          [^/]*
          \/
          \%{regex-opts}
          ([),;.]|\s|$)
        )</start>
      <end>\/\%{regex-opts}</end>
      <include>
        <context ref="escape"/>
        <context ref="def:line-continue"/>
        <context ref="complex-interpolation"/>
        <context ref="simple-interpolation"/>
        <context ref="regex-bracketed"/>
      </include>
    </context>

    <context id="ruby" class="no-spell-check">
      <include>
        <context ref="def:shebang"/>
        <context ref="def:shell-like-comment"/>
        <context ref="multiline-comment"/>
        <context ref="here-doc-single-quoted-string"/>
        <context ref="here-doc-double-quoted-string"/>
        <context ref="here-doc-string"/>
        <context ref="here-doc-indented-string"/>
        <context ref="double-quoted-string"/>
        <context ref="single-quoted-string"/>
        <context ref="backtick-quoted-string"/>
        <context ref="attribute-definitions"/>
        <context ref="definitions"/>
        <context ref="module-handlers"/>
        <context ref="keywords"/>
        <context ref="builtins"/>
        <context ref="special-variables"/>
        <context ref="predefined-variables"/>
        <context ref="global-variables"/>
        <context ref="class-variables"/>
        <context ref="instance-variables"/>
        <context ref="symbols"/>
        <context ref="regexp-variables"/>
        <context ref="constants"/>
        <context ref="nil-value"/>
        <context ref="boolean"/>
        <context ref="float"/>
        <context ref="decimal"/>
        <context ref="hex"/>
        <context ref="octal"/>
        <context ref="binary"/>
        <context ref="character-literal"/>
        <context ref="regex-alt-form"/>
        <context ref="regex-simple"/>
        <context ref="non-interpolated-literal"/>
        <context ref="interpolated-literal"/>
      </include>
    </context>

  </definitions>
</language>
