Squirrel highlighting XML for the Kate text editor

squirrel.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE language SYSTEM "language.dtd">

<language name="Squirrel" version="1.0" kateversion="2.5" section="Scripts" extensions="*.nut;*.gnut">
  <highlighting>
    <list name="keywords">
        <item> break </item>
        <item> case </item>
        <item> catch </item>
        <item> class </item>
        <item> clone </item>
        <item> constructor </item>
        <item> continue </item>
        <item> default </item>
        <item> delegate </item>
        <item> delete </item>
        <item> do </item>
        <item> else </item>
        <item> enum </item>
        <item> extends </item>
        <item> extern </item>
        <item> false </item>
        <item> for </item>
        <item> foreach </item>
        <item> function </item>
        <item> goto </item>
        <item> if </item>
        <item> in </item>
        <item> inline </item>
        <item> instanceof </item>
        <item> null </item>
        <item> parent </item>
        <item> resume </item>
        <item> return </item>
        <item> sizeof </item>
        <item> static </item>
        <item> struct </item>
        <item> switch </item>
        <item> this </item>
        <item> throw </item>
        <item> true </item>
        <item> try </item>
        <item> typedef </item>
        <item> typeof </item>
        <item> union </item>
        <item> vargc </item>
        <item> vargv </item>
        <item> while </item>
        <item> yield </item>
        <item> #if </item>
        <item> #endif </item>
        <item> #else </item>
        <item> #elseif </item>
        <item> const </item>
        <item> thread </item>
    </list>
    <list name="datatype">
        <item> entity </item>
        <item> void </item>
        <item> var </item>
        <item> int </item>
        <item> float </item>
        <item> bool </item>
        <item> string </item>
        <item> array </item>
        <item> table </item>
        <item> function </item>
        <item> class </item>
        <item> instanceof </item>
    </list>
    <list name="types">
        <item> local </item>
        <item> global </item>
        <item> globalize </item>
    </list>
    <contexts>
      <context attribute="Normal Text" lineEndContext="#stay" name="Normal">
        <DetectSpaces />
        <keyword attribute="Keyword" context="#stay" String="keywords"/>
        <keyword attribute="Function Type" context="#stay" String="types"/>
        <keyword attribute="Data Type" context="#stay" String="datatype"/>
        <DetectChar attribute="String" context="string" char="&quot;" />
        <Float attribute="Float" context="#stay"/>
        <HlCOct attribute="Octal" context="#stay"/>
        <HlCHex attribute="Hex" context="#stay"/>
        <Int attribute="Decimal" context="#stay"/>
        <Detect2Chars attribute="Comment" context="Comment 1" char="/" char1="/"/>
        <Detect2Chars attribute="Comment" context="Comment 2" char="/" char1="*" beginRegion="Comment"/>
        <AnyChar attribute="Symbol" context="#stay" String="@%\',.?"/>
        <AnyChar attribute="Stuff" context="#stay" String="(){}[]"/>
        <AnyChar attribute="Operator" context="#stay" String="!=-+*/:;&lt;&gt;&amp;~^|"/>
        <RegExpr attribute="Function" context="#stay" String="[a-zA-Z_]* *(?=\()"/>
      </context>
      <context attribute="String" lineEndContext="#stay" name="string" >
        <DetectChar attribute="String" context="#pop" char="&quot;" />
      </context>
      <context attribute="Comment" lineEndContext="#pop" name="Comment 1"/>
      <context attribute="Comment" lineEndContext="#stay" name="Comment 2">
        <Detect2Chars attribute="Comment" context="#pop" char="*" char1="/" endRegion="Comment"/>
      </context>
    </contexts>
    <itemDatas>
      <itemData name="Stuff" defStyleNum="dsSpecialChar" />
      <itemData name="Normal Text" defStyleNum="dsNormal" />
      <itemData name="Keyword" defStyleNum="dsKeyword" />
      <itemData name="Function Type" defStyleNum="dsDataType" />
      <itemData name="Data Type" defStyleNum="dsDataType" />
      <itemData name="String" defStyleNum="dsString" />
      <itemData name="Decimal" defStyleNum="dsDecVal"/>
      <itemData name="Octal" defStyleNum="dsBaseN"/>
      <itemData name="Hex" defStyleNum="dsBaseN"/>
      <itemData name="Float" defStyleNum="dsFloat"/>
      <itemData name="Char" defStyleNum="dsChar"/>
      <itemData name="String" defStyleNum="dsString"/>
      <itemData name="String Char" defStyleNum="dsChar"/>
      <itemData name="Comment" defStyleNum="dsComment"/>
      <itemData name="Function" defStyleNum="dsFunction"/>
      <itemData name="Variable" defStyleNum="dsVariable"/>
      <itemData name="Operator" defStyleNum="dsOperator"/>
      <itemData name="Symbol" defStyleNum="dsNormal"/>
    </itemDatas>
    <general>
      <comments>
        <comment name="singleLine" start="//"/>
        <comment name="multiLine" start="/*" end="*/" region="Comment"/>
      </comments>
      <keywords casesensitive="1"/>
    </general>
  </highlighting>
</language>

To use this on linux, drop it in $HOME/.local/share/org.kde.syntax-highlighting/syntax/

On windows, the location is %USERPROFILE%\AppData\Local\org.kde.syntax-highlighting\syntax

If you are not getting highlighting after installing the file, check Tools>Highlighting>Scripts for and entry named "Squirrel". If there is one, the highlighting file has been picked up. You can enable it manually for individual files from here. But you may need to create a filetype to apply the highlighting automatically on file open.

Go to Settings>Configure Kate>Open/Save>Modes & Filetypes

If you cannot find Scripts/Squirrel in the list, add it. Then set Highlighting to Scripts/Squirrel and set "File extensions" to *.nut;*.gnut