Re: [Flex-help] Regular expressions match everything except

[Marcel L. <ma...@la...>]

You're using character classes incorrectly. I suggest taking some time to
reread the "Patterns" section in the Flex manual very carefully. You're
going to have a hard time in the future without fully understanding
patterns :).
http://flex.sourceforge.net/manual/Patterns.html

My suggestion is to change that to something like this:
"ENDCODE" {
BEGIN(INTITIAL);
yytext[yyleng - 7] = 0; // remove "ENDCODE" from yytext
yylval->stringVal = new std::string(yytext);
return token::ENDCODE;
}
[^E]+|E {
yymore();
}


On Tue, 04 Aug 2009 00:24:25 +0100, Alex Duller <al...@pi...> wrote:
> Hi,
> I'm trying to extract text between two boundary keywords as shown below:
> 
> CODE
> std::cout << "Hello, world" << std::endl;
> ENDCODE;
> 
> So I want to get the text between CODE and ENDCODE but don't want to end 
> up parsing it. At the moment I'm trying to use start conditions like so:
> <cpp>{
>   "ENDCODE" { BEGIN(INITIAL); return token::ENDCODE; }
>   [^ENDCODE]+ {
>     yylval->stringVal = new std::string(yytext);
>   }
> }
> 
> It sort of works except that the second pattern isn't quite correct and 
> breaks whenever anything like 'END' or 'ND' is found...
> 
> Any suggestions will be greatly appreciated.
> 
> thanks,
> Alex
> 
>
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