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Regular expression and lexer parser question

 
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mstaszew



Joined: 21 Jul 2006
Posts: 67
Location: North Carolina, USA
PostPosted: Mon Oct 19, 2009 2:16 pm    Post subject: Regular expression and lexer parser question Reply with quote
If I have a parser rule for a lexer set to look for the following...

[\w$\#]+

...then it correctly treat underscores as word characters. If I tweak the expression to handle Unicode...

(?r)[\w$\#]+

...then underscores are no longer handled as word characters. Is this correct or a bug?

Thanks,
Michael
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econtrol
Site Admin


Joined: 09 Jun 2006
Posts: 202
PostPosted: Tue Nov 10, 2009 10:45 pm    Post subject: Reply with quote
Yes, it is a bug.
Fix (ecStrUtils.pas, 747)

Code:

function IsIdentChar(const C: AnsiChar): Boolean;
begin
  Result := IsIdentLetterChar(C) or IsIdentDigitChar(C)
            or (C = '_'); // it was omitted
end;
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