Saturday, October 03, 2009

SyntaxHighlighter 2.0 Brushes for F# and Erlang

Updating the Erlang brush

// WTFPL licensed
SyntaxHighlighter.brushes.Erlang = function() {
    var keywords = 'after begin case catch cond end fun if let of query receive when '+
        'define record export import include include_lib ifdef ifndef else endif undef '+
        'apply attribute call do in letrec module primop try';
  
    this.values = new Object();
    this.values.regex = new RegExp('[^\\w"\'](_?[A-Z]\\w*)', 'g');
    this.values.exec = function(value) { m = this.regex.exec(value);  if (m && m.length) {m[0] = m[0].substring(1, m[0].length); ++m.index;} return m;}

    this.regexList = [
       { regex: new RegExp('%.*$', 'gm'),    css: 'comments' },   // one line comments  
       { regex: SyntaxHighlighter.regexLib.doubleQuotedString,     css: 'string' },   // strings  
       { regex: SyntaxHighlighter.regexLib.singleQuotedString,     css: 'plain' },   // strings  
       { regex: new RegExp(this.getKeywords(keywords), 'gm'),  css: 'keyword' },  // Erlang keyword  
       { regex: new RegExp('\\?\\w*', 'gm'), css: 'erlmacros'},    
       { regex: this.values, css: 'erlvalues'},  
       { regex: new RegExp('\\w+/\\d+', 'gm'), css: 'functions'}
      ];
}

SyntaxHighlighter.brushes.Erlang.prototype = new SyntaxHighlighter.Highlighter();
SyntaxHighlighter.brushes.Erlang.aliases = ['erlang', 'erl'];

This also required the following in the CSS theme

.syntaxhighlighter .erlvalues,
.syntaxhighlighter .erlvalues a
{ color: #c88; font-weight: bold;}

.syntaxhighlighter .erlmacros,
.syntaxhighlighter .erlmacros a
{ color: gray; font-weight: bold;}

And for F#

// WTFPL licensed
// scratching the surface of research microsoft com/fsharp/manual/spec2.aspx#_Toc207785562
// omits reserved-ident-formats, reserved-symbolic-sequence, quote-op-*, symbolic-op, ...
SyntaxHighlighter.brushes.FSharp = function()
{
 var keywords = 'abstract and as assert base begin class default delegate do done ' +
  'downcast downto elif else end exception extern false finally for '+
  'fun function if in inherit inline interface internal lazy let ' +
  'match member module mutable namespace new null of open or '+
  'override private public rec return static struct then to '+
  'true try type upcast use val void when while with yield';
  var ocaml = 'asr land lor lsl lsr lxor mod sig';
  var reserved ='atomic break checked component const constraint constructor '+
  'continue eager event external fixed functor global include '+
  'method mixin object parallel process protected pure '+
  'sealed tailcall trait virtual volatile';
  var symbolic = 'let! use! do! yield! return! \\| -> <- \\. : \\( \\) \\[ \\] \\[< >\\] \\[\\| \\|\\] '+
  '\\{ \\} \' # :\\?> :\\? ; ;; :> := _ \\.\\. ::';

 this.regexList = [
  { regex: SyntaxHighlighter.regexLib.singleLineCComments,    css: 'comments' },   // one line comments
    { regex: new RegExp('\\(\\*[\\s\\S]*?\\*\\)', 'gm'),   css: 'comments' },   // multiline comments
  { regex: SyntaxHighlighter.regexLib.doubleQuotedString,     css: 'string' },   // strings
    { regex: new RegExp('^\\s*#.*', 'gm'),      css: 'preprocessor' },  // preprocessor tags like #light
  { regex: new RegExp(this.getKeywords(keywords), 'gm'),  css: 'keyword' },  // f# keyword
  //{ regex: new RegExp(this.getKeywords(ocaml), 'gm'),  css: 'color1' },   // caml keyword
  //{ regex: new RegExp(this.getKeywords(reserved), 'gm'),  css: 'color2' },   // reserved keyword
  //{ regex: new RegExp(this.getKeywords(symbolic), 'gm'),  css: 'color3' }   // symbolic keyword
  ];
}

SyntaxHighlighter.brushes.FSharp.prototype = new SyntaxHighlighter.Highlighter();
SyntaxHighlighter.brushes.FSharp.aliases = ['f#', 'f-sharp', 'fsharp'];

which is as incomplete as it always was; but doesn't use any extra CSS.


Later -- another brush for F# that was published at about the same time can be found at Pense-Moi.

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