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Re: [Re: Flex scanner stops when bison is calling]

From: Robert Williamson
Subject: Re: [Re: Flex scanner stops when bison is calling]
Date: Wed, 28 May 2003 15:15:46 -0000

It turned out that, indeed, it was a very simple error. I inadvertently
included a return statement in the brackets for one of my productions. This
causes bison to halt.


Paul Eggert <address@hidden> wrote:
Robert Williamson <address@hidden> writes:

> I am working with bison 1.75 and flex 2.5.4 on SunOS 5.7 (Solaris). I'm not
> sure why, but when I generate a parser with my scanner, the scanner only
> reports the first token. I'm sure the scanner is ok, because I have used it
> scan a variety of different inputs successfully.

That doesn't necessarily mean that the scanner is OK; it could be that
there is a bug in the scanner that is tickled by Bison 1.75.

Have you tried it with Bison 1.875?  Or Bison 1.875a?

If that doesn't fix the problem for you, please post more details
about your scanner and parser, as we can't help much from what you


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