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

 This file is part of GtkSourceView

 Authors: Elias Aebi
 Copyright (C) 2021 Elias Aebi

 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="lean" name="Lean" version="2.0" _section="Source">
  <metadata>
    <property name="mimetypes">text/x-lean</property>
    <property name="globs">*.lean</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="command" name="Command" map-to="def:preprocessor"/>
    <style id="keyword" name="Keyword" map-to="def:keyword"/>
    <style id="string" name="String" map-to="def:string"/>
    <style id="character" name="Character" map-to="def:character"/>
    <style id="escaped-character" name="Escaped Character" map-to="def:special-char"/>
    <style id="numeric" name="Numeric" map-to="def:number"/>
    <style id="boolean" name="Boolean" map-to="def:boolean"/>
  </styles>

  <definitions>
    <context id="line-comment" style-ref="comment" end-at-line-end="true" class="comment" class-disabled="no-spell-check">
      <start>--</start>
      <include>
        <context ref="def:in-comment"/>
      </include>
    </context>

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

    <context id="command" style-ref="command">
      <match extended="true">
        ^\s*\#(
            check(_failure)?
          | eval
          | print
          | reduce
        )
      </match>
    </context>

    <context id="keyword" style-ref="keyword">
      <keyword>axiom</keyword>
      <keyword>break</keyword>
      <keyword>class</keyword>
      <keyword>continue</keyword>
      <keyword>def</keyword>
      <keyword>do</keyword>
      <keyword>else</keyword>
      <keyword>end</keyword>
      <keyword>example</keyword>
      <keyword>for</keyword>
      <keyword>fun</keyword>
      <keyword>if</keyword>
      <keyword>in</keyword>
      <keyword>inductive</keyword>
      <keyword>instance</keyword>
      <keyword>let</keyword>
      <keyword>match</keyword>
      <keyword>mut</keyword>
      <keyword>namespace</keyword>
      <keyword>open</keyword>
      <keyword>return</keyword>
      <keyword>section</keyword>
      <keyword>structure</keyword>
      <keyword>then</keyword>
      <keyword>theorem</keyword>
      <keyword>universe</keyword>
      <keyword>variable</keyword>
      <keyword>where</keyword>
      <keyword>with</keyword>
      <keyword>λ</keyword>
    </context>

    <define-regex id="string-escape" extended="true">
      \\(
          \\
        | \"
        | \'
        | n
        | t
        | x[0-9a-fA-F]{2}
      )
    </define-regex>

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

    <context id="character" style-ref="character" end-at-line-end="true">
      <start>'</start>
      <end>'</end>
      <include>
        <context style-ref="escaped-character">
          <match>\%{string-escape}</match>
        </context>
      </include>
    </context>

    <context id="numeric" style-ref="numeric">
      <match extended="true">
          0[bB][0-1]+
        | 0[oO][0-7]+
        | 0[xX][0-9a-fA-F]+
        | [0-9]+
      </match>
    </context>

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

    <context id="lean" class="no-spell-check">
      <include>
        <context ref="line-comment"/>
        <context ref="block-comment"/>
        <context ref="command"/>
        <context ref="keyword"/>
        <context ref="string"/>
        <context ref="character"/>
        <context ref="numeric"/>
        <context ref="boolean"/>
      </include>
    </context>

  </definitions>
</language>