Enhancements in flex for error handling

[kbinu]

Hi
     We have been using flex generated scanners for a project. In our
application, we need to ensure that the application does not exit on system
errors including memory allocation failures. For errors that might occur
while the scanner allocates memory, we thought we would re-define
YY_FATAL_ERROR to something like
#define YY_FATAL_ERROR(x) return (error_indication=x, 0)
where error_indication is a global that I would check after the lexer
returns. This however is not feasible since YY_FATAL_ERROR is used in
functions called within yylex. Some of these do not return values. Also
yylex doesn't check if the called function encountered errors.
Is there any plan to enhance flex to return cleanly from yylex instead of
using exit() ? If not, any references on how to go about modifying the
skeleton scanner for this feature ?

-Binu