Also warn about non-used mid-rule values.

[bison.git] / ChangeLog

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+2006-01-04  Akim Demaille  <akim@epita.fr>
+
+       Also warn about non-used mid-rule values.
+       * src/symlist.h, src/symlist.c (symbol_list): Add a mid_rule
+       member.
+       (symbol_list_new): Adjust.
+       * src/reader.c (symbol_typed_p): New.
+       (grammar_rule_check): Use it.
+       (grammar_midrule_action): Bind a mid-rule LHS to its rule.
+       Check its rule.
+       * tests/input.at (AT_CHECK_UNUSED_VALUES): New.
+       Use it.
+       * tests/actions.at (Exotic Dollars): Adjust.
+
+2006-01-04  Akim Demaille  <akim@epita.fr>
+
+       * src/reader.c (grammar_midrule_action): If $$ is set in a
+       mid-rule, move the `used' bit to its lhs.
+       * tests/input.at (Unused values): New.
+       * tests/actions.at (Exotic Dollars): Adjust: exp is not typed.
+
 2006-01-03  Paul Eggert  <eggert@cs.ucla.edu>
 
+       * doc/bison.texinfo (Bison Options): Say more accurately what
+       --yacc does.
+       * src/parse-gram.y (rules_or_grammar_declaration): Don't complain
+       about declarations in the grammar when in Yacc mode, as POSIX does
+       not require a diagnostic when the grammar uses extensions.
+
+       * src/reduce.c (reduce_grammar): Remove unnecessary cast to bool.
+
+       Warn about dubious constructions like "%token T T".
+       Reported by twlevo.
+       * src/symtab.h (struct symbol.declared): New member.
+       * src/symtab.c (symbol_new): Initialize it to false.
+       (symbol_class_set): New arg DECLARING, specifying whether
+       this is a declaration that we want to warn about, if there
+       is more than one of them.  All uses changed.
+
        * data/glr.c, data/glr.cc, data/lalr1.cc, data/yacc.c:
        Allow multiple %union directives, whose contents concatenate.
        * src/parse-gram.y (grammar_declaration): Likewise.