[re2c-general] [ re2c-Feature Requests-1232777 ] negated char classes

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Feature Requests item #1232777, was opened at 2005-07-05 14:28
Message generated for change (Comment added) made by helly
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Category: None
Group: None
Status: Open
>Priority: 3
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: negated char classes

Initial Comment:
Hi,

I think one big addition would be negated char classes, 
whose syntax would be like Perl or PHP:
[^abc]

With this, you could build an easier comment parser, 
like:
Ccomments = "/*" ([^*]* | "*" [^/])* "*/";
CPPcomments = "//" [^\r\n]*

a dot-all match would also be usefull:
anychar = .
instead of the the char class you use in the examples:
anychar = [\000-\377]


Both these two additions should be easy to add, and 
should also have great performance.

Regards,
Nuno Lopes

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>Comment By: Marcus Börger (helly)
Date: 2005-07-05 18:16

Message:
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It would have absolutley no impact on the performance (You'd 
need to completley understand how re2c works to 
understand this though).

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You can respond by visiting: 
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