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Re: [PATCH] -Werror: fix for rules useless in parser after conflicts.
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From: |
Joel E. Denny |
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Subject: |
Re: [PATCH] -Werror: fix for rules useless in parser after conflicts. |
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Date: |
Tue, 3 Aug 2010 18:39:05 -0400 (EDT) |
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User-agent: |
Alpine 1.00 (DEB 882 2007-12-20) |
On Sun, 1 Aug 2010, Joel E. Denny wrote:
> Now thinking beyond 2.4.3, the only specific case of -Werror not working
> that was mentioned on comp.compilers is the case of R/R conflicts. Bison
> currently does not label R/R conflict messages as warnings, so it is not
> as clear in this case that -Werror should have any effect. Would treating
> parser conflicts as warnings be too contrary to traditional yacc/bison
> thinking? Besides, bison already supports %error and %error-rr to turn
> them into errors.
Sorry, I meant %expect and %expect-rr.
> On the other hand, it seems that any diagnostic printed
> on stderr is at least a warning, and I can see how the user might
> appreciate a guarantee that -Werror will prevent him from missing any such
> diagnostic. That seems to be the thinking at comp.compilers. Opinions?