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

 Authors: Jim Teeuwen
 Copyright (C) 2009-2010 Jim Teeuwen <jimteeuwen@gmail.com>
 Copyright (C) 2010 Kenny Meyer <knny.myer@gmail.com>

 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/>.


  See: http://code.google.com/p/go/source/browse/misc/vim/syntax/go.vim
-->
<language id="go" name="Go" version="2.0" _section="Source">
  <metadata>
    <property name="mimetype">text/x-go</property>
    <property name="globs">*.go</property>
    <property name="line-comment-start">//</property>
    <property name="block-comment-start">/*</property>
    <property name="block-comment-end">*/</property>
  </metadata>

  <styles>
    <style id="comment"           name="Comment"               map-to="def:comment"/>
    <style id="error"             name="Error"                 map-to="def:error"/>
    <style id="string"            name="String"                map-to="def:string"/>
    <style id="char"              name="Character"             map-to="def:character"/>
    <style id="keyword"           name="Keyword"               map-to="def:keyword"/>
    <style id="external"          name="External"              map-to="def:preprocessor"/>
    <style id="type"              name="Data Type"             map-to="def:type"/>
    <style id="printf"            name="printf Conversion"     map-to="def:special-char"/>
    <style id="escaped-character" name="Escaped Character"     map-to="def:special-char"/>
    <style id="floating-point"    name="Floating point number" map-to="def:floating-point"/>
    <style id="imaginary"         name="Imaginary number"      map-to="def:number"/>
    <style id="binary"            name="Binary number"         map-to="def:base-n-integer"/>
    <style id="decimal"           name="Decimal number"        map-to="def:decimal"/>
    <style id="octal"             name="Octal number"          map-to="def:base-n-integer"/>
    <style id="hexadecimal"       name="Hexadecimal number"    map-to="def:base-n-integer"/>
    <style id="boolean"           name="Boolean value"         map-to="def:boolean"/>
    <style id="builtin-constant"  name="Builtin Constant"      map-to="def:special-constant"/>
    <style id="builtin-function"  name="Builtin Function"      map-to="def:builtin"/>
  </styles>

  <definitions>
    <define-regex id="escaped-character" extended="true">
      \\(                  # leading backslash
      [\\\"\'nrbtfav\?] |  # escaped character
      [0-7]{3} |           # three octal digits
      x[0-9A-Fa-f]{2} |    # 'x' followed by two hex digits
      u[0-9A-Fa-f]{4} |    # Little Unicode escape, 'u' followed by four hex digits
      U[0-9A-Fa-f]{8}      # Big Unicode escape, 'U' followed by eight hex digits
      )
    </define-regex>
    
    <define-regex id="oct" extended="true">
      0[Oo]?(_?[0-7])+
    </define-regex>
    
    <define-regex id="dec" extended="true">
      (0|[1-9](_?[0-9])*)
    </define-regex>
    
    <define-regex id="bin" extended="true">
      0[Bb](_?[01])+
    </define-regex>
    
    <define-regex id="hex" extended="true">
      0[Xx](_?[0-9A-Fa-f])+
    </define-regex>

    <!--contexts NOT used on the main context-->
    <context id="printf" style-ref="printf" extend-parent="false">
      <match extended="true">
        \%\%|\%
        [#0\-\ \+]*                            # flags
        (?:[1-9][0-9]*|\[[1-9][0-9]*\]\*)?       # width
        (?:\.(?:[0-9]+|\[[1-9][0-9]*\]\*))?      # precision
        (\[[1-9][0-9]*\])?[vTtbcdoOqxXUeEfFgGsp] # conversion specifier
      </match>
    </context>

    <!--contexts used on the main context-->
    <context id="comment" style-ref="comment" end-at-line-end="true" class-disabled="no-spell-check">
      <start>//</start>
      <include>
        <context ref="def:in-line-comment"/>
      </include>
    </context>

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

    <context id="close-comment-outside-comment" style-ref="error">
      <match>\*/(?!\*)</match>
    </context>

    <context id="quoted-string" style-ref="string" end-at-line-end="true" class-disabled="no-spell-check">
      <start>"</start>
      <end>"</end>
      <include>
        <context ref="printf"/>
        <context id="escaped-character" style-ref="escaped-character">
          <match>\%{escaped-character}</match>
        </context>
        <context ref="def:line-continue"/>
      </include>
    </context>

    <context id="backquote-string" style-ref="string" end-at-line-end="false" class-disabled="no-spell-check">
      <start>`</start>
      <end>`</end>
      <include>
        <context ref="printf"/>
        <context ref="def:line-continue"/>
      </include>
    </context>

    <context id="char" style-ref="char">
      <match>'(\%{escaped-character}|.)'</match>
    </context>

    <define-regex id="float" extended="true">
      ((\.[0-9](_?[0-9])* | [0-9](_?[0-9])*\.[0-9]?(_?[0-9])*) ([Ee][+-]?[0-9](_?[0-9])*)? |
      ([0-9](_?[0-9])*[Ee][+-]?[0-9](_?[0-9])*) |
      0[Xx]_?(\.[0-9A-Fa-f](_?[0-9A-Fa-f])* | [0-9A-Fa-f](_?[0-9A-Fa-f])*\.?([0-9A-Fa-f](_?[0-9A-Fa-f])*)?)[Pp][+-]?[0-9](_?[0-9])*
      )
    </define-regex>

    <context id="imaginary" style-ref="imaginary">
      <match>(?&lt;![\w\.])(\%{float}|\%{oct}|\%{bin}|\%{hex}|\%{dec})[i]\b</match>
    </context>

    <context id="float" style-ref="floating-point">
      <match>(?&lt;![\w\.])\%{float}(?![\w\.])</match>
    </context>

    <context id="hexadecimal" style-ref="hexadecimal">
      <match extended="true">
        (?&lt;![\w\.])
        \%{hex}
        (?![\w\.])
      </match>
    </context>
    
    <context id="binary" style-ref="binary">
      <match extended="true">
        (?&lt;![\w\.])
        \%{bin}
        (?![\w\.])
      </match>
    </context>

    <context id="invalid-hexadecimal" style-ref="error">
      <match extended="true">
        (?&lt;![\w\.])
        0[xX][a-fA-F0-9]*[ghj-zGHJ-Z][a-zA-Z0-9]*
        (?![\w\.])
      </match>
    </context>

    <context id="octal" style-ref="octal">
      <match extended="true">
        (?&lt;![\w\.])
        \%{oct}
        (?![\w\.])
      </match>
    </context>

    <context id="invalid-octal" style-ref="error">
      <match extended="true">
        (?&lt;![\w\.])
        0[Oo]?[0-7]*[89][0-9]*
        (?![\w\.])
      </match>
    </context>

    <context id="decimal" style-ref="decimal">
      <match extended="true">
        (?&lt;![\w\.])
        \%{dec}
        (?![\w\.])
      </match>
    </context>

    <context id="boolean" style-ref="boolean">
      <match extended="true">
        (?&lt;![\w\.])
        (true|false)
        (?![\w\.])
      </match>
    </context>

    <context id="externals" style-ref="external">
      <keyword>import</keyword>
      <keyword>package</keyword>
    </context>

    <context id="keywords" style-ref="keyword">
      <keyword>break</keyword>
      <keyword>case</keyword>
      <keyword>const</keyword>
      <keyword>continue</keyword>
      <keyword>default</keyword>
      <keyword>defer</keyword>
      <keyword>else</keyword>
      <keyword>fallthrough</keyword>
      <keyword>for</keyword>
      <keyword>func</keyword>
      <keyword>go</keyword>
      <keyword>goto</keyword>
      <keyword>if</keyword>
      <keyword>interface</keyword>
      <keyword>range</keyword>
      <keyword>return</keyword>
      <keyword>select</keyword>
      <keyword>struct</keyword>
      <keyword>switch</keyword>
      <keyword>type</keyword>
      <keyword>var</keyword>
    </context>

    <context id="types" style-ref="type">
      <keyword>bool</keyword>
      <keyword>byte</keyword>
      <keyword>chan</keyword>
      <keyword>complex64</keyword>
      <keyword>complex128</keyword>
      <keyword>error</keyword>
      <keyword>float32</keyword>
      <keyword>float64</keyword>
      <keyword>func</keyword>
      <keyword>int</keyword>
      <keyword>int8</keyword>
      <keyword>int16</keyword>
      <keyword>int32</keyword>
      <keyword>int64</keyword>
      <keyword>map</keyword>
      <keyword>rune</keyword>
      <keyword>string</keyword>
      <keyword>uint</keyword>
      <keyword>uint8</keyword>
      <keyword>uint16</keyword>
      <keyword>uint32</keyword>
      <keyword>uint64</keyword>
      <keyword>uintptr</keyword>
    </context>

    <context id="builtin-constant" style-ref="builtin-constant">
      <keyword>iota</keyword>
      <keyword>nil</keyword>
    </context>

    <context id="builtin-function" style-ref="builtin-function">
      <keyword>append</keyword>
      <keyword>cap</keyword>
      <keyword>close</keyword>
      <keyword>complex</keyword>
      <keyword>copy</keyword>
      <keyword>delete</keyword>
      <keyword>imag</keyword>
      <keyword>len</keyword>
      <keyword>make</keyword>
      <keyword>new</keyword>
      <keyword>panic</keyword>
      <keyword>real</keyword>
      <keyword>recover</keyword>
    </context>

    <context id="go" class="no-spell-check">
      <include>
        <context ref="comment"/>
        <context ref="comment-multiline"/>
        <context ref="close-comment-outside-comment"/>
        <context ref="quoted-string"/>
        <context ref="backquote-string"/>
        <context ref="char"/>
        <context ref="binary"/>
        <context ref="float"/>
        <context ref="hexadecimal"/>
        <context ref="imaginary"/>
        <context ref="invalid-hexadecimal"/>
        <context ref="octal"/>
        <context ref="invalid-octal"/>
        <context ref="decimal"/>
        <context ref="boolean"/>
        <context ref="keywords"/>
        <context ref="externals"/>
        <context ref="types"/>
        <context ref="builtin-constant"/>
        <context ref="builtin-function"/>
      </include>
    </context>

  </definitions>
</language>