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Re: user destructor for unresolved GLR semantic value
From: |
Joel E. Denny |
Subject: |
Re: user destructor for unresolved GLR semantic value |
Date: |
Thu, 25 Aug 2005 00:20:14 -0400 (EDT) |
On Wed, 24 Aug 2005, Joel E. Denny wrote:
> It's clear to me now that YYPRINT()'s only purpose is to print the
> semantic value. If there isn't a semantic value, then there's no point in
> invoking YYPRINT(). Thus, yysymprint() can just check whether yyvaluep is
> NULL to decide whether to invoke YYPRINT().
Sigh.... I suppose this was a moot point. YYPRINT() is only for tokens.
Token semantic values are never unresolved.
> Index: data/c.m4
> ===================================================================
> RCS file: /cvsroot/bison/bison/data/c.m4,v
> retrieving revision 1.30
> diff -p -u -r1.30 c.m4
<snip>
> @@ -407,7 +409,7 @@ b4_location_if([ (void) yylocationp;
> ])dnl
> [
> # ifdef YYPRINT
> - if (yytype < YYNTOKENS)
> + if (yytype < YYNTOKENS && yyvaluep)
> YYPRINT (yyoutput, yytoknum[yytype], *yyvaluep);
> # endif
> switch (yytype)
So I guess this particular change wasn't necessary, but it seems a little
cleaner anyway.
Joel
- user destructor for unresolved GLR semantic value, Joel E. Denny, 2005/08/24
- Re: user destructor for unresolved GLR semantic value, Joel E. Denny, 2005/08/24
- Re: user destructor for unresolved GLR semantic value, Joel E. Denny, 2005/08/24
- Re: user destructor for unresolved GLR semantic value,
Joel E. Denny <=
- Re: user destructor for unresolved GLR semantic value, Paul Eggert, 2005/08/25
- Re: user destructor for unresolved GLR semantic value, Joel E. Denny, 2005/08/25
- Re: user destructor for unresolved GLR semantic value, Paul Eggert, 2005/08/25
- Re: user destructor for unresolved GLR semantic value, Joel E. Denny, 2005/08/25
- Re: user destructor for unresolved GLR semantic value, Joel E. Denny, 2005/08/25
Re: user destructor for unresolved GLR semantic value, Joel E. Denny, 2005/08/25