Flex Column Numbers

[cman]

What's the best way to associate line and column numbers with a token using Flex? I've tried something like this:

Code: [Select]

"token"               { sourceColumnNumber += yyleng; return tokenDefine; }
.........................
"\n"                     { sourceColumnNumber = 1; sourceLineNumber ++; }


I seem to get improper results with certain productions. Thanks for any information!