tartrazine/lexers/r.xml

<lexer>
  <config>
    <name>R</name>
    <alias>splus</alias>
    <alias>s</alias>
    <alias>r</alias>
    <filename>*.S</filename>
    <filename>*.R</filename>
    <filename>*.r</filename>
    <filename>.Rhistory</filename>
    <filename>.Rprofile</filename>
    <filename>.Renviron</filename>
    <mime_type>text/S-plus</mime_type>
    <mime_type>text/S</mime_type>
    <mime_type>text/x-r-source</mime_type>
    <mime_type>text/x-r</mime_type>
    <mime_type>text/x-R</mime_type>
    <mime_type>text/x-r-history</mime_type>
    <mime_type>text/x-r-profile</mime_type>
    <priority>0.1</priority> <!-- higher priority than Rebol -->
  </config>
  <rules>
    <state name="numbers">
      <rule pattern="0[xX][a-fA-F0-9]+([pP][0-9]+)?[Li]?">
        <token type="LiteralNumberHex"/>
      </rule>
      <rule pattern="[+-]?([0-9]+(\.[0-9]+)?|\.[0-9]+|\.)([eE][+-]?[0-9]+)?[Li]?">
        <token type="LiteralNumber"/>
      </rule>
    </state>
    <state name="operators">
      <rule pattern="&lt;&lt;?-|-&gt;&gt;?|-|==|&lt;=|&gt;=|&lt;|&gt;|&amp;&amp;?|!=|\|\|?|\?">
        <token type="Operator"/>
      </rule>
      <rule pattern="\*|\+|\^|/|!|%[^%]*%|=|~|\$|@|:{1,3}">
        <token type="Operator"/>
      </rule>
    </state>
    <state name="root">
      <rule>
        <include state="keywords"/>
      </rule>
      <rule pattern="((?:`[^`\\]*(?:\\.[^`\\]*)*`)|(?:(?:[a-zA-z]|[_.][^0-9])[\w_.]*))\s*(?=\()">
        <token type="NameFunction"/>
      </rule>
      <rule>
        <include state="statements"/>
      </rule>
      <rule pattern="\{|\}">
        <token type="Punctuation"/>
      </rule>
      <rule pattern=".">
        <token type="Text"/>
      </rule>
    </state>
    <state name="valid_name">
      <rule pattern="(?:`[^`\\]*(?:\\.[^`\\]*)*`)|(?:(?:[a-zA-z]|[_.][^0-9])[\w_.]*)">
        <token type="Name"/>
      </rule>
    </state>
    <state name="keywords">
      <rule pattern="(if|else|for|while|repeat|in|next|break|return|switch|function)(?![\w.])">
        <token type="KeywordReserved"/>
      </rule>
    </state>
    <state name="builtin_symbols">
      <rule pattern="(NULL|NA(_(integer|real|complex|character)_)?|letters|LETTERS|Inf|TRUE|FALSE|NaN|pi|\.\.(\.|[0-9]+))(?![\w.])">
        <token type="KeywordConstant"/>
      </rule>
      <rule pattern="(T|F)\b">
        <token type="NameBuiltinPseudo"/>
      </rule>
    </state>
    <state name="string_squote">
      <rule pattern="([^\&#39;\\]|\\.)*\&#39;">
        <token type="LiteralString"/>
        <pop depth="1"/>
      </rule>
    </state>
    <state name="comments">
      <rule pattern="#.*$">
        <token type="CommentSingle"/>
      </rule>
    </state>
    <state name="punctuation">
      <rule pattern="\[{1,2}|\]{1,2}|\(|\)|;|,">
        <token type="Punctuation"/>
      </rule>
    </state>
    <state name="statements">
      <rule>
        <include state="comments"/>
      </rule>
      <rule pattern="\s+">
        <token type="Text"/>
      </rule>
      <rule pattern="\&#39;">
        <token type="LiteralString"/>
        <push state="string_squote"/>
      </rule>
      <rule pattern="\&#34;">
        <token type="LiteralString"/>
        <push state="string_dquote"/>
      </rule>
      <rule>
        <include state="builtin_symbols"/>
      </rule>
      <rule>
        <include state="valid_name"/>
      </rule>
      <rule>
        <include state="numbers"/>
      </rule>
      <rule>
        <include state="punctuation"/>
      </rule>
      <rule>
        <include state="operators"/>
      </rule>
    </state>
    <state name="string_dquote">
      <rule pattern="([^&#34;\\]|\\.)*&#34;">
        <token type="LiteralString"/>
        <pop depth="1"/>
      </rule>
    </state>
  </rules>
</lexer>