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Re: YYSTYPE_IS_TRIVIAL
From: |
Akim Demaille |
Subject: |
Re: YYSTYPE_IS_TRIVIAL |
Date: |
24 Apr 2002 13:44:17 +0200 |
User-agent: |
Gnus/5.0808 (Gnus v5.8.8) XEmacs/21.4 (Common Lisp) |
>>>>> "Paul" == Paul Eggert <address@hidden> writes:
>> There is a global variable, named `typed'. I would simply
>> MUSCLE_INSERT_INT ("stype_is_trivial", typed); in reader.c:prepare,
>> and in bison.simple, just use b4_stype_is_trivial with regular M4
>> macros.
Paul> But don't see how to tell whether the type is trivial in m4. If
Paul> the user defines the C macro YYSTYPE, then the code must assume
Paul> that the type not trivial. This is not something that m4 can
Paul> do, as far as I know.
Hm, there must be something I don't understand here. Do we agree that
the definition of being trivial, for yystype, is strictly when %union
is used? So my suggestion is that reader.c:prepare does something
like
MUSCLE_INSERT_INT ("stype_is_trivial", typed);
because typed = (%union is used) and that bison.simple uses this
information, for instance
#define YYSTYPE_IS_TRIVIAL b4_stype_is_trivial
But I guess our misunderstanding is elsewhere.
>> It is up to you to use it to define a CPP macro, or to decide to
>> use M4 to decide what code should be output.
Paul> I guess that I have to do the former.
Here, I meant that you can either #if YYSTYPE_IS_TRIVIAL/#endif, or
m4_if(b4_stype_is_trivial, 1, []).
--
Ashamed.
- YYSTYPE_IS_TRIVIAL, Akim Demaille, 2002/04/22
- Re: YYSTYPE_IS_TRIVIAL, Paul Eggert, 2002/04/22
- Re: YYSTYPE_IS_TRIVIAL, Akim Demaille, 2002/04/23
- Re: YYSTYPE_IS_TRIVIAL, Paul Eggert, 2002/04/24
- FYI: autoreconf (Was: YYSTYPE_IS_TRIVIAL), Akim Demaille, 2002/04/24
- Re: YYSTYPE_IS_TRIVIAL, Akim Demaille, 2002/04/24
- Re: YYSTYPE_IS_TRIVIAL, Paul Eggert, 2002/04/24
- Re: YYSTYPE_IS_TRIVIAL, Akim Demaille, 2002/04/24
- Re: YYSTYPE_IS_TRIVIAL, Paul Eggert, 2002/04/24
- Re: YYSTYPE_IS_TRIVIAL, Akim Demaille, 2002/04/25
- Re: YYSTYPE_IS_TRIVIAL,
Akim Demaille <=
- Re: YYSTYPE_IS_TRIVIAL, Paul Eggert, 2002/04/24
- Re: YYSTYPE_IS_TRIVIAL, Akim Demaille, 2002/04/25
- Re: YYSTYPE_IS_TRIVIAL, Paul Eggert, 2002/04/26
Message not available
- Re: YYSTYPE_IS_TRIVIAL, Akim Demaille, 2002/04/23
- Re: YYSTYPE_IS_TRIVIAL, Paul Eggert, 2002/04/23
- Re: YYSTYPE_IS_TRIVIAL, Akim Demaille, 2002/04/24
- Re: YYSTYPE_IS_TRIVIAL, Paul Eggert, 2002/04/24
- Re: YYSTYPE_IS_TRIVIAL, Akim Demaille, 2002/04/24
- Re: YYSTYPE_IS_TRIVIAL, Akim Demaille, 2002/04/25