From: Tom Copeland <tom@...>
Date: 2006-09-15T11:15:17+09:00
Subject: Re: Regular expression question.

On Thu, 2006-09-14 at 05:49 +0900, Robert Dober wrote:
> On 9/13/06, Paul Lutus <nospam@nosite.zzz> wrote:
> I am intrigued, I believe that the regular expression to find all comments
> in C must be very complex and probably not the correct tool, look at these
> snipplets
> 
> //  /*
> if(strcmp(x,"*/")
> // "*/
> etc. etc.

I'm not sure if it's impossible to parse out C-style comments using a
regular expression, but the various JavaCC grammars I've seen all use
lexical states to do it instead.  Another complication is trigraphs (*),
although I think those are unrecognized by default in most C
preprocessors.

Yours,

Tom

(*) http://en.wikipedia.org/wiki/C_trigraph