Don't allow an undeclared string literal, but allow a string literal to

[bison.git] / ChangeLog

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+2006-08-18  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       Don't allow an undeclared string literal, but allow a string literal to
+       be used before its declaration.
+       * src/reader.c (check_and_convert_grammar): Don't invoke packgram if
+       symbols_pack complained.
+       * src/symtab.c (symbol_new): Don't count a string literal as a new
+       symbol.
+       (symbol_class_set): Don't count a string literal as a new token, and
+       don't assign it a symbol number since symbol_make_alias does that.
+       (symbol_make_alias): It's not necessary to decrement the symbol and
+       token counts anymore.  Don't assume that an alias declaration occurs
+       before any uses of the identifier or string, and thus don't assert that
+       one of them has the highest symbol number so far.
+       (symbol_check_alias_consistency): Complain if there's a string literal
+       that wasn't declared as an alias.
+       (symbols_pack): Bail if symbol_check_alias_consistency failed since
+       symbol_pack asserts that every token has been assigned a symbol number
+       although undeclared string literals have not.
+       * tests/regression.at (String alias declared after use, Undeclared
+       string literal): New test case.
+       (Characters Escapes, Web2c Actions): Declare string literals as
+       aliases.
+       * tests/sets.at (Firsts): Likewise.
+
 2006-08-14  Joel E. Denny  <jdenny@ces.clemson.edu>
 
        In the grammar scanner, STRING_FINISH unclosed constructs and return