On Wed, May 18, 2005 at 10:08:09PM +0200, Hans Aberg wrote:
|| At 13:22 -0400 2005/05/18, Aaron Jackson wrote:
|| >On May 18, 2005, at 4:46 AM, Nicolas Peyrussie wrote:
|| >>I am using flex and don't want to see yyout as output.
|| >>The only way I found to sort it out was to redirect yyout
|| >>to a file (out.txt), but I don't think it is a really
|| >>good idea to do that.
|| >>
|| >>Do you know if I can just say 'I don't want to see the
|| >>output' in Flex ?
|| >
|| >The flex man page says:
|| >
|| >The scanner writes its ECHO output to the yyout global
|| >(default, std-out), which may be redefined by the user
|| >simply by assigning it to some other FILE pointer.
||
|| I think Flex imnplements a default rule
|| . ECHO
|| which can be overriden by writing
|| . { /* whatever you like */ }
True.
However, if you hit your default rule, that means that your
token definitions didn't cover all possible input. For some
applications, that's a BAD thing.
If so, find the holes in your token definitions, and plug them.
I like to use %option nodefault precisely for that reason.
Ciao. Vincent.
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