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[bison.git] / ChangeLog

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+2003-06-09  Paul Hilfinger  <Hilfinger@CS.Berkeley.EDU>
+
+       * data/glr.c (YYERROR): Update definition to reset yyerrState to 0
+       first.
+       (yyrecoverSyntaxError): Correct the logic for setting and testing
+       yyerrState.
+       Correct comment on handling EOF.
+       Allow states with only a default reduction, rather than failing
+       (I can't quite reconstruct why these were not allowed before). 
+
+        Fixes to avoid problem that $-N rules in GLR parsers can cause
+       buffer overruns, corrupting state.
+       
+       * src/output.c (prepare_rules): Output max_left_semantic_context 
+       definition.
+       * src/reader.h (max_left_semantic_context): New variable declaration.
+       * src/scan-gram.l (max_left_semantic_context): Define.
+       (handle_action_dollar): Update max_left_semantic_context.
+       * data/glr.c (YYMAXLEFT): New definition.
+       (yydoAction): Increase size of yyrhsVals by YYMAXLEFT.
+       (yyresolveAction): Ditto.
+
+       Fixes to problems with location handling in GLR parsers reported by
+       Frank Heckenbach (2003/06/05).
+
+       * data/glr.c (YYLTYPE): Make trivial if locations not used.
+       (YYRHSLOC): Add parentheses, and define only if locations used.
+       (YYLLOC_DEFAULT): Add parentheses, and give trivial definition if
+       locations not used.
+       (yyuserAction): Use YYLLOC_DEFAULT to set *yylocp.
+       (yydoAction): Remove redundant initialization of *yyvalp and *yylocp.
+       
+       * tests/cxx-type.at: Exercise location information; update tests
+       to differentiate output with and without locations.
+       Remove forward declarations of yylex and yyerror---caused errors 
+       because default YYLTYPE not yet defined.
+       Change semantic actions to compute strings, rather than printing
+       them directly (to test proper passing of semantics values).  Change
+       output to prefix notation and update test data and expected results.
+       (yylex): Track locations.
+       (stmtMerge): Return value rather than printing, and include arguments
+       in value.
+       
 2003-06-03  Paul Eggert  <eggert@twinsun.com>
 
        Avoid warnings generated by GCC 2.95.4 when Bison is