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Disable unset/unused mid-rule value warnings by default, and recognize

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--warnings=midrule-values to enable them.  Discussed starting at
<http://lists.gnu.org/archive/html/help-bison/2006-10/msg00030.html>.
* NEWS (2.3a+): Mention.
* src/getargs.c, src/getargs.h (warnings_args, warnings_types, enum
warnings): Add entry for midrule-values subargument.
* src/reader.c (symbol_should_be_used): Don't return true just because
the value is a set/used mid-rule value unless
--warnings=midrule-values was specified.
* tests/input.at (Unused values, Unused values before symbol
declarations): Run tests with and without --warnings=midrule-values.

* src/reader.c (check_and_convert_grammar): Use symbol_list_free rather
than LIST_FREE directly.
This commit is contained in:
Joel E. Denny
2006-11-01 06:09:40 +00:00
parent 89eb3c7653
commit 17bd8a736a
6 changed files with 81 additions and 32 deletions
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10
src/getargs.c
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@@ -203,16 +203,18 @@ static const char * const warnings_args[] =
{
/* In a series of synonyms, present the most meaningful first, so
that argmatch_valid be more readable. */
"none - no warnings",
"yacc - incompatibilities with POSIX YACC",
"all - all of the above",
"error - warnings are errors",
"none - no warnings",
"midrule-values - unset or unused midrule values",
"yacc - incompatibilities with POSIX YACC",
"all - all of the above",
"error - warnings are errors",
0
};
static const int warnings_types[] =
{
warnings_none,
warnings_midrule_values,
warnings_yacc,
warnings_all,
warnings_error