* data/glr.c (yyGLRStateSet): Add yybool* yylookaheadStatuses member to

[bison.git] / ChangeLog

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+2006-01-06  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       * data/glr.c (yyGLRStateSet): Add yybool* yylookaheadStatuses member to
+       use during nondeterministic operation to track which stacks have
+       actually needed the current lookahead.
+       (yyinitStateSet, yyfreeStateSet, yyremoveDeletes, yysplitStack):
+       Allocate, deallocate, resize, and otherwise shuffle space for
+       yylookaheadStatuses in parallel with yystates member of yyGLRStateSet.
+       (yysplitStack, yyprocessOneStack, yyparse): Set lookahead status
+       appropriately during nondeterministic operation.
+       (yySemanticOption): Add int yyrawchar, YYSTYPE yyval, and YYLTYPE yyloc
+       members to store the current lookahead to be used by the deferred
+       user action.
+       (yyaddDeferredAction): Add size_t yyk parameter specifying the stack
+       from which the RHS is taken.  Set the lookahead members of the new
+       yySemanticOption according to the lookahead status for stack yyk.
+       (yyglrShiftDefer, yyglrReduce): Pass yyk parameter on to
+       yyaddDeferredAction.
+       (yyresolveAction): Set yychar, yylval, and yylloc to the lookahead
+       members of yySemanticOption before invoking yyuserAction, and then set
+       them back to their current values afterward.
+       (yyparse): Set yychar = YYEMPTY where yytoken = YYEMPTY.
+       (yyreportAmbiguity): Add /*ARGSUSED*/ to pacify lint.
+       * tests/glr-regression.at: Remove `.' from the ends of recent test case
+       titles for consistency.
+       (Leaked merged semantic value if user action cuts parse): In order to
+       suppress lint warnings, use arguments in merge function, and assign
+       char value < 128 in main.
+       (Incorrect lookahead during deterministic GLR): New test case.
+       (Incorrect lookahead during nondeterministic GLR): New test case.
+
+2006-01-06  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       * data/c.m4 (b4_yy_symbol_print_generate): In yy_symbol_print, accept   
+       !yyvaluep as signal that no semantic value is available to print.
+       * data/glr.c (yydestroyGLRState): If state is not resolved, don't try
+       to print a semantic value.
+
+2006-01-06  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       * tests/glr-regression.at: For consistency with my newer test cases,
+       don't thank myself.
+
+2006-01-05  Joel E. Denny  <jdenny@ces.clemson.edu>
+
+       * data/glr.c (yyresolveValue): When merging semantic options, if at
+       least one user action succeeds but a later one cuts the parse, then
+       destroy the semantic value before returning rather than leaking it.
+       (yyresolveStates): If a user action cuts the parse and thus
+       yyresolveValue fails, ignore the (unset) semantic value rather than
+       corrupting the yyGLRState, and empty the semantic options list since
+       the user actions should have called all necessary destructors.
+       Simplify code with YYCHK.
+       * tests/glr-regression.at (Corrupted semantic options if user action
+       cuts parse): New test case.
+       (Undesirable destructors if user action cuts parse): New test case.
+       Before applying any of this patch, this test case never actually failed
+       for me... but only because the corrupted semantic options usually
+       masked this bug.
+       (Leaked merged semantic value if user action cuts parse): New test
+       case.
+
+2006-01-05  Akim Demaille  <akim@epita.fr>
+
+       * src/reader.c, src/symlist.h, src/symlist.c: s/mid_rule/midrule/.
+
+2006-01-04  Paul Eggert  <eggert@cs.ucla.edu>
+
+       * data/c.m4 (b4_c_modern): New macro, with a new provision for
+       _MSC_VER.  Problem reported by Cenzato Marco.
+       (b4_c_function_def): Use it.
+       * data/yacc.c (YYMODERN_C): Remove.  All uses replaced by
+       b4_c_modern.
+       (yystrlen, yystpcpy, yyparse): Use b4_c_function... macros rather
+       than rolling our own.
+
+2006-01-04  Akim Demaille  <akim@epita.fr>
+
+       Also warn about non-used mid-rule values.
+       * src/symlist.h, src/symlist.c (symbol_list): Add a mid_rule
+       member.
+       (symbol_list_new): Adjust.
+       * src/reader.c (symbol_typed_p): New.
+       (grammar_rule_check): Use it.
+       (grammar_midrule_action): Bind a mid-rule LHS to its rule.
+       Check its rule.
+       * tests/input.at (AT_CHECK_UNUSED_VALUES): New.
+       Use it.
+       * tests/actions.at (Exotic Dollars): Adjust.
+
+2006-01-04  Akim Demaille  <akim@epita.fr>
+
+       * src/reader.c (grammar_midrule_action): If $$ is set in a
+       mid-rule, move the `used' bit to its lhs.
+       * tests/input.at (Unused values): New.
+       * tests/actions.at (Exotic Dollars): Adjust: exp is not typed.
+
 2006-01-03  Paul Eggert  <eggert@cs.ucla.edu>
 
        * doc/bison.texinfo (Bison Options): Say more accurately what