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Re: [Help-source-highlight] Highlighting regular expression literals in


From: Lorenzo Bettini
Subject: Re: [Help-source-highlight] Highlighting regular expression literals in JavaScript code
Date: Mon, 15 Oct 2007 15:26:53 +0200
User-agent: Mozilla-Thunderbird 2.0.0.4 (X11/20070828)

address@hidden wrote:
Lorenzo Bettini wrote:
address@hidden wrote:
Source-highlight currently does not highlight JavaScript regular expression literals.

http://developer.mozilla.org/en/docs/Core_JavaScript_1.5_Reference:Global_Objects:RegExp

I am wondering what would be the best way to highlight these? This is what I came up with:

include "c_comment.lang"

#
# Pattern for matching regular expression literals:
# The negative lookahead at the end protects against cases like this:
#   var foo = a / b;  /* foo is the quotient */
# Still fooled by things like this:
#   var foo = a / b / c;
#   var foo = a / f('foo/bar');
#
regexp = '/(\\.|[^\\/])+/(?![*/])'

include "number.lang"

include "c_string.lang"

keyword = "abstract|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|false|final|finally|for|function|goto|if|implements|in|instanceof|interface|native|new|null|private|protected|prototype|public|return|static|super|switch|synchronized|throw|throws|this|transient|true|try|typeof|var|volatile|while|with"

include "symbols.lang"

cbracket = "{|}"

include "function.lang"


sorry for my late answer on this issue! :-)

I'll try to take a look at this problem, probably your solution should be fine :-)

cheers
    Lorenzo


I have been doing some additional work on it and made a few modifications:

include "c_comment.lang"

# highlight the flags    vvvvvv
regexp = '/(\\.|[^\\/])+/[gim]*(?![*/])'

include "number.lang"

include "c_string.lang"

keyword = "abstract|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|false|final|finally|for|function|goto|if|implements|in|instanceof|interface|native|new|null|private|protected|prototype|public|return|static|super|switch|synchronized|throw|throws|this|transient|true|try|typeof|var|volatile|while|with"

# this was originally in the java.lang file, I removed it because I
# thought it was only for Java, but on further reflection all the
# words are reserved words in JavaScript (and "void" is an actual
# keyword), so it is best to leave it in
type = "int|byte|boolean|char|long|float|double|short|void"

include "symbols.lang"

cbracket = "{|}"

# in JavaScript, the '$' is valid in an identifier
vardef FUNCTION = '([[:alpha:]]|_|\$)[[:word:]\$]*[[:blank:]]*(?=\()'
function = $FUNCTION


the new version (2.8) contains your changes :-)
thanks!

cheers
        Lorenzo

--
Lorenzo Bettini, PhD in Computer Science, DSI, Univ. di Firenze
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