diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/bison.texinfo | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/doc/bison.texinfo b/doc/bison.texinfo index d377b5c6..3c63a19a 100644 --- a/doc/bison.texinfo +++ b/doc/bison.texinfo @@ -4837,8 +4837,8 @@ 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{""}. @@ -7991,16 +7991,19 @@ 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 |