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* data/bison.simple (yyparse): Do not implement @$ = @1.

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(YYLLOC_DEFAULT): Adjust to do it.
* doc/bison.texinfo (Location Default Action): Fix.
This commit is contained in:
Akim Demaille
2002-05-02 16:40:54 +00:00
parent 3a8b410924
commit b2d52318fa
4 changed files with 25 additions and 23 deletions
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6
ChangeLog
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@@ -1,3 +1,9 @@
2002-05-02 Akim Demaille <akim@epita.fr>
* data/bison.simple (yyparse): Do not implement @$ = @1.
(YYLLOC_DEFAULT): Adjust to do it.
* doc/bison.texinfo (Location Default Action): Fix.
2002-05-02 Akim Demaille <akim@epita.fr>
* src/reader.c (parse_braces): Merge into...

8
NEWS
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@@ -43,9 +43,11 @@ Changes in version 1.49b:
* Revert the C++ namespace changes introduced in 1.31, as they caused too
many portability hassles.
* Items overflow
Bison no longer dumps core when there are too many items, it just
dies.
* Default locations
By an accident of design, the default computation of @$ was
performed after another default computation was performed: @$ = @1.
The latter is now removed: YYLLOC_DEFAULT is fully responsible of
the computation of @$.
* Token end-of-file
The token end of file may be specified by the user, in which case,

18
data/bison.simple
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@@ -465,16 +465,14 @@ while (0)
#define YYERRCODE 256
/* YYLLOC_DEFAULT -- Compute the default location (before the actions
are run).
When YYLLOC_DEFAULT is run, CURRENT is set the location of the
first token. By default, to implement support for ranges, extend
its range to the last symbol. */
are run). */
#ifndef YYLLOC_DEFAULT
# define YYLLOC_DEFAULT(Current, Rhs, N) \
Current.last_line = Rhs[[N]].last_line; \
Current.last_column = Rhs[[N]].last_column;
# define YYLLOC_DEFAULT(Current, Rhs, N) \
Current.first_line = Rhs[[1]].first_line; \
Current.first_column = Rhs[[1]].first_column; \
Current.last_line = Rhs[[N]].last_line; \
Current.last_column = Rhs[[N]].last_column;
#endif
/* YYLEX -- calling `yylex' with the right arguments. */
@@ -956,9 +954,7 @@ yyreduce:
yyval = yyvsp[1-yylen];
#if YYLSP_NEEDED
/* Similarly for the default location. Let the user run additional
commands if for instance locations are ranges. */
yyloc = yylsp[1-yylen];
/* Default location. */
YYLLOC_DEFAULT (yyloc, (yylsp - yylen), yylen);
#endif

16
doc/bison.texinfo
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@@ -2886,9 +2886,11 @@ By default, it is defined this way:
@example
@group
#define YYLLOC_DEFAULT(Current, Rhs, N) \
Current.last_line = Rhs[N].last_line; \
Current.last_column = Rhs[N].last_column;
#define YYLLOC_DEFAULT(Current, Rhs, N) \
Current.first_line = Rhs[1].first_line; \
Current.first_column = Rhs[1].first_column; \
Current.last_line = Rhs[N].last_line; \
Current.last_column = Rhs[N].last_column;
@end group
@end example
@@ -2900,12 +2902,8 @@ All arguments are free of side-effects. However, only the first one (the
result) should be modified by @code{YYLLOC_DEFAULT}.
@item
Before @code{YYLLOC_DEFAULT} is executed, the output parser sets @code{@@$}
to @code{@@1}.
@item
For consistency with semantic actions, valid indexes for the location array
range from 1 to @var{n}.
For consistency with semantic actions, valid indexes for the location
array range from 1 to @var{n}.
@end itemize
@node Declarations