bison ./ChangeLog src/derives.c src/gram.h src/...

[Akim Demaille]

CVSROOT:        /cvsroot/bison
Module name:    bison
Branch:         bison-1_29-branch
Changes by:     Akim Demaille <address@hidden>  01/11/30 05:46:08

Modified files:
        .              : ChangeLog 
        src            : derives.c gram.h print.c reader.c reduce.c 
        tests          : reduce.at 

Log message:
        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.

CVSWeb URLs:
http://savannah.gnu.org/cgi-bin/viewcvs/bison/bison/ChangeLog.diff?only_with_tag=bison-1_29-branch&tr1=1.173.2.179&tr2=1.173.2.180&r1=text&r2=text
http://savannah.gnu.org/cgi-bin/viewcvs/bison/bison/src/derives.c.diff?only_with_tag=bison-1_29-branch&tr1=1.13.2.6&tr2=1.13.2.7&r1=text&r2=text
http://savannah.gnu.org/cgi-bin/viewcvs/bison/bison/src/gram.h.diff?only_with_tag=bison-1_29-branch&tr1=1.6.2.4&tr2=1.6.2.5&r1=text&r2=text
http://savannah.gnu.org/cgi-bin/viewcvs/bison/bison/src/print.c.diff?only_with_tag=bison-1_29-branch&tr1=1.17.2.15&tr2=1.17.2.16&r1=text&r2=text
http://savannah.gnu.org/cgi-bin/viewcvs/bison/bison/src/reader.c.diff?only_with_tag=bison-1_29-branch&tr1=1.72.2.21&tr2=1.72.2.22&r1=text&r2=text
http://savannah.gnu.org/cgi-bin/viewcvs/bison/bison/src/reduce.c.diff?only_with_tag=bison-1_29-branch&tr1=1.19.2.13&tr2=1.19.2.14&r1=text&r2=text
http://savannah.gnu.org/cgi-bin/viewcvs/bison/bison/tests/reduce.at.diff?only_with_tag=bison-1_29-branch&tr1=1.1.2.2&tr2=1.1.2.3&r1=text&r2=text