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Re: too many warnings from Bison CVS for Pike
From: |
Joel E. Denny |
Subject: |
Re: too many warnings from Bison CVS for Pike |
Date: |
Mon, 13 Feb 2006 18:29:43 -0500 (EST) |
On Mon, 30 Jan 2006, Joel E. Denny wrote:
> Now that I look over your example grammars, it's clear to me that the
> warnings are sometimes too much. But perhaps the solution is just to have
> two levels of warnings:
[snip]
> c. For a $$ or $n that corresponds to a mid-rule action, bison warns if
> one is mentioned but not the other... because that just seems bizarre and
> likely a mistake. It's bizarre regardless of whether there's a
> %destructor for the used type. %type is impossible of course.
The second to last sentence is flawed. You don't declare %destructor for
a type. You declare it for a symbol. Thus, neither %destructor nor %type
can be declared for mid-rule action values.
You can convert a mid-rule action to a nonterminal, but it seems there is
no other way to prevent its value from being leaked during error recovery.
Is my understanding correct?
Joel
- Re: too many warnings from Bison CVS for Pike, (continued)
- Message not available
- (no subject), haberg, 2006/02/06
Re: too many warnings from Bison CVS for Pike,
Joel E. Denny <=