Warn about dubious constructions like "%token T T".

[bison.git] / ChangeLog

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 2006-01-03  Paul Eggert  <eggert@cs.ucla.edu>
 
+       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.