Re: flex question

[Hans-Bernhard Broeker]

On Thu, 18 Oct 2001, W. L. Estes wrote:

> >   fatal flex scanner internal error--end of buffer missed
[...]
> > This problem happens only on one test case, and other 75 tests passes OK.
> > gcc version I'm using on the Linux system (Red Hat 7.1) is egcs-2.91.66. 
> > The same input works fine if I use 'lex' on a Sun Solaris machine.

Hmm... has this same scanner ever been used with 'flex' instead of
classical AT&T lex?  I.e. did you try "flex" on Solaris?

If not, the problem may well be that the scanner is assuming it can rely
on undocumented implementation details of AT&T lex.  One thing to watch
out for is modification of yyleng (including calls of yyless()) in any
rule that also uses yymore().  I got bitten by that one myself when
porting a time-approved lexer source from lex to flex.

-- 
Hans-Bernhard Broeker (address@hidden)
Even if all the snow were burnt, ashes would remain.