Future/bison
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/bison.git synced 2026-03-09 12:23:04 +00:00
Code Issues Packages Projects Releases Wiki Activity

%expext was not functioning at all.

Browse Source 
* src/conflicts.c (expected_conflicts): Set to -1.
(conflict_report): Use ngettext.
(conflicts_print): Check %expect and make its violation an error.
* doc/bison.texinfo (Expect Decl): Adjust.
* configure.in (AM_GNU_GETTEXT): Ask for ngettext.
* tests/regression.at (%expect not enough, %expect right)
(%expect too much): New.
This commit is contained in:
Akim Demaille
2001-11-12 09:33:38 +00:00
parent ba9dda1a2e
commit 7da99edea7
6 changed files with 113 additions and 35 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
doc/bison.texinfo
View File

@@ -3071,11 +3071,11 @@ terminal symbol. All kinds of token declarations allow
@findex %expect
Bison normally warns if there are any conflicts in the grammar
(@pxref{Shift/Reduce, ,Shift/Reduce Conflicts}), but most real grammars have harmless shift/reduce
conflicts which are resolved in a predictable way and would be difficult to
eliminate. It is desirable to suppress the warning about these conflicts
unless the number of conflicts changes. You can do this with the
@code{%expect} declaration.
(@pxref{Shift/Reduce, ,Shift/Reduce Conflicts}), but most real grammars
have harmless shift/reduce conflicts which are resolved in a predictable
way and would be difficult to eliminate. It is desirable to suppress
the warning about these conflicts unless the number of conflicts
changes. You can do this with the @code{%expect} declaration.
The declaration looks like this:
@@ -3083,10 +3083,11 @@ The declaration looks like this:
%expect @var{n}
@end example
Here @var{n} is a decimal integer. The declaration says there should be no
warning if there are @var{n} shift/reduce conflicts and no reduce/reduce
conflicts. The usual warning is given if there are either more or fewer
conflicts, or if there are any reduce/reduce conflicts.
Here @var{n} is a decimal integer. The declaration says there should be
no warning if there are @var{n} shift/reduce conflicts and no
reduce/reduce conflicts. An error, instead of the usual warning, is
given if there are either more or fewer conflicts, or if there are any
reduce/reduce conflicts.
In general, using @code{%expect} involves these steps: