Extend the front-end API for %define variables to more completely

[bison.git] / ChangeLog

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+2007-05-20  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       Extend the front-end API for %define variables to more completely
+       mirror the back-end.  This will be useful in the future.
+       * data/bison.m4 (b4_percent_define_get, b4_percent_define_ifdef):
+       Update comments to mention the new front-end counterparts of these
+       macros.
+       * src/muscle_tab.c (MUSCLE_COMMON_DECODE): New macro with common code
+       for muscle_string_decode and muscle_location_decode.
+       (muscle_string_decode): New static function.
+       (muscle_location_decode): Use MUSCLE_COMMON_DECODE.
+       (muscle_percent_define_get, muscle_percent_define_ifdef): New
+       functions.
+       (muscle_percent_define_flag_if): Use muscle_percent_define_ifdef and
+       muscle_percent_define_get to mimic the b4_percent_define_flag_if
+       implementation more closely.
+       (muscle_percent_define_invalid_value): New function.
+       * src/muscle_tab.h (muscle_percent_define_get,
+       muscle_percent_define_ifdef, muscle_percent_define_invalid_value):
+       Prototype.
+
+2007-05-07  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       * NEWS (2.3a+): Mention yesterday's state-removal change.
+       (2.3a): Remove the %language entry, which was added after 2.3a.
+       * src/LR0.c, src/closure.c, src/closure.h, src/conflicts.c,
+       src/conflicts.h, src/lalr.c, src/lalr.h, src/print.c,
+       src/print_graph.c, src/state.c, src/state.h, tests/conflicts.at,
+       tests/existing.at: Update copyright date.
+
+2007-05-06  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       If conflict resolution makes states unreachable, remove those states,
+       report rules that are then unused, and don't report conflicts in those
+       states.
+       * src/conflicts.c, src/conflicts.h (conflicts_update_state_numbers):
+       New global function.
+       * src/lalr.c, src/lalr.h (lalr_update_state_numbers): New global
+       function.
+       * src/main.c (main): After conflict resolution, remove the unreachable
+       states and update all data structures that reference states by number.
+       * src/state.c (state_new): Initialize each state's reachable member to
+       false.
+       (state_mark_reachable_states): New static function.
+       (state_remove_unreachable_states): New global function.
+       * src/state.h (struct state): Add member bool reachable.
+       (state_remove_unreachable_states): Prototype.
+       * tests/conflicts.at (Unreachable States After Conflict Resolution):
+       New test case.
+       * tests/existing.at (GNU pic Grammar): Update test case output now that
+       an unused rule is discovered.
+
 2007-05-06  Joel E. Denny  <jdenny@ces.clemson.edu>
 
        Minor code cleanup in parser table construction.