Fix some comments concerning LR(0) versus LALR(1).

[bison.git] / ChangeLog

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@@ -1,3 +1,45 @@
+2010-01-04  Joel E. Denny  <jdenny@clemson.edu>
+
+       Fix some comments concerning LR(0) versus LALR(1).
+
+       Stop equating LR(0) with nondeterminism and LALR(1) with
+       determinism.  That is, if all states are consistent, then LR(0)
+       tables are deterministic.  On the other hand, LALR(1) tables
+       might be nondeterministic before conflict resolution, and GLR
+       permits LALR(1) tables to remain nondeterministic.
+       * src/LR0.c, src/LR0.h: Here.
+       * src/lalr.c, src/lalr.h: Here.
+       * src/main.c (main): Here.
+       * src/state.c, src/state.h: Here.
+
+       * src/ielr.h (ielr): In preconditions, expect LR(0) not LALR(1)
+       parser tables.
+
+2010-01-04  Joel E. Denny  <jdenny@clemson.edu>
+
+       maint: run "make update-copyright"
+
+2009-12-30  Joel E. Denny  <jdenny@clemson.edu>
+
+       POSIX: complain if %prec's token was not defined.
+       * NEWS (2.5): Document.
+       * src/reader.c (grammar_rule_check): Convert warning to
+       complaint.
+       * tests/input.at (%prec's token must be defined): Update.
+
+2009-12-30  Joel E. Denny  <jdenny@clemson.edu>
+
+       POSIX: warn if %prec's token was not defined.
+       Reported by Florian Krohm at
+       <http://lists.gnu.org/archive/html/bug-bison/2009-12/msg00005.html>.
+       * NEWS (2.4.2): Document.
+       * src/reader.c (grammar_rule_check): Implement.
+       (grammar_current_rule_prec_set): Add comments explaining that we
+       here assume a %prec identifier is a token, but we still manage
+       to support POSIX.
+       * tests/input.at (%prec's token must be defined): New test
+       group.
+
 2009-12-31  Joel E. Denny  <jdenny@clemson.edu>
 
        * HACKING (Release Procedure): Recommend a secure automake.
@@ -25116,9 +25158,8 @@
 
        -----
 
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+       Inc.
 
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