3 Commits

Author	SHA1	Message	Date
Akim Demaille	d39a6b7ca9	Instead of mapping the LHS of unused rules to -1, keep the LHS ... valid, but flag the rules as invalid. * src/gram.h (rule_t): `useful' is a new member. * src/print.c (print_grammar): Adjust. * src/derives.c (set_derives): Likewise. * src/reader.c (packgram, reduce_output): Likewise. * src/reduce.c (reduce_grammar_tables): Likewise. * tests/reduce.at (Underivable Rules, Useless Rules): New.	2001-11-30 10:46:08 +00:00
Akim Demaille	ea451a17d7	* src/reduce.c (nonterminals_reduce): Instead of throwing away ... useless nonterminals, move them at the end of the symbol arrays. (reduce_output): Adjust. * tests/reduce.at (Useless Nonterminals): Adjust.	2001-11-30 10:45:28 +00:00
Akim Demaille	0aa2ac9063	* tests/reduce.at (Useless Terminals, Useless Nonterminals): New. ... * src/reduce.c (reduce_grammar_tables): Do not free useless tags, as all tags are free'ed afterwards. From Enrico Scholz.	2001-11-28 11:42:56 +00:00