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Convert multiple variable definition warnings to complaints.

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* NEWS (2.5): Add a new entry for that change.
* doc/bison.texinfo (Decl Summary): Update %define entry.
(Bison Options): Update -D/--define/-F/--force-define entry.
* src/muscle-tab.c (muscle_percent_define_insert): Implement.
* src/muscle-tab.h (muscle_percent_define_insert): Update
comments.
* tests/input.at (`%define errors'): Update.
(`%define, --define, --force-define'): Update.
(cherry picked from commit e3a33f7c23)
This commit is contained in:
Joel E. Denny
2009-05-23 02:25:28 -04:00
parent de5ab9400a
commit 0b6d43c52f
6 changed files with 62 additions and 35 deletions
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23
doc/bison.texinfo
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@@ -4845,8 +4845,8 @@ The possible choices for @var{variable}, as well as their meanings, depend on
the selected target language and/or the parser skeleton (@pxref{Decl
Summary,,%language}, @pxref{Decl Summary,,%skeleton}).
Bison will warn if a @var{variable} is defined by @code{%define}
multiple times, but @ref{Bison Options,,-D @var{name}[=@var{value}]}.
It is an error if a @var{variable} is defined by @code{%define} multiple
times, but @ref{Bison Options,,-D @var{name}[=@var{value}]}.
Omitting @code{"@var{value}"} is always equivalent to specifying it as
@code{""}.
@@ -8149,16 +8149,19 @@ definitions for the same @var{name} as follows:
@itemize
@item
Bison processes all command-line definitions in order and then processes
all @code{%define} definitions in order.
Bison quietly ignores all command-line definitions for @var{name} except
the last.
@item
Later definitions override earlier definitions except that Bison quietly
ignores all @code{%define} definitions if the last command-line
definition is specified by @code{-F} or @code{--force-define}.
If that command-line definition is specified by a @code{-D} or
@code{--define}, Bison reports an error for any @code{%define}
definition for @var{name}.
@item
Bison never warns when a command-line definition overrides another
definition, but Bison always warns when a @code{%define} definition
overrides a command-line or @code{%define} definition.
If that command-line definition is specified by a @code{-F} or
@code{--force-define} instead, Bison quietly ignores all @code{%define}
definitions for @var{name}.
@item
Otherwise, Bison reports an error if there are multiple @code{%define}
definitions for @var{name}.
@end itemize
You should avoid using @code{-F} and @code{--force-define} in your