X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/affac6132ae6ee354e1497e456b5c81a0c84334f..32c292920e804e2246cd7d83fbc773022b9fe95a:/ChangeLog diff --git a/ChangeLog b/ChangeLog index 468d548c..0d822d9a 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,6 +1,263 @@ +2006-01-11 Joel E. Denny + + * doc/bison.texinfo: Fix some typos. + (GLR Semantic Actions): New subsection discussing special + considerations because GLR semantic actions might be deferred. + (Actions): Mention look-ahead usage of yylval. + (Actions and Locations): Mention look-ahead usage of yylloc. + (Special Features for Use in Actions): Add YYEOF entry and mention it + in the yychar entry. + In the yychar entry, remove mention of the local yychar case (pure + parser) since this is irrelevant information when writing semantic + actions and since it's already discussed in `Bison Symbols' where + yychar is otherwise described as an external variable. + In the yychar entry, don't call it the `current' look-ahead since it + isn't when semantic actions are deferred. + In the yychar and yyclearin entries, add note about deferred semantic + actions. + Add yylloc and yylval entries discussing look-ahead usage. + (Look-Ahead Tokens): When discussing yychar, don't call it the + `current' look-ahead, and do mention yylval and yylloc. + (Error Recovery): Cross-reference `Action Features' when mentioning + yyclearin. + (Bison Symbols): In the yychar entry, don't call it the `current' + look-ahead. + In the yylloc and yylval entries, mention look-ahead usage. + +2006-01-08 Joel E. Denny + + * tests/glr-regression.at: Update copyright year to 2006. + +2006-01-06 Joel E. Denny + + * 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 + + * 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 + + * tests/glr-regression.at: For consistency with my newer test cases, + don't thank myself. + +2006-01-05 Joel E. Denny + + * 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 + + * src/reader.c, src/symlist.h, src/symlist.c: s/mid_rule/midrule/. + +2006-01-04 Paul Eggert + + * 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 + + 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 + + * 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 + + * doc/bison.texinfo (Bison Options): Say more accurately what + --yacc does. + * src/parse-gram.y (rules_or_grammar_declaration): Don't complain + about declarations in the grammar when in Yacc mode, as POSIX does + not require a diagnostic when the grammar uses extensions. + + * src/reduce.c (reduce_grammar): Remove unnecessary cast to bool. + + Warn about dubious constructions like "%token T T". + Reported by twlevo. + * src/symtab.h (struct symbol.declared): New member. + * src/symtab.c (symbol_new): Initialize it to false. + (symbol_class_set): New arg DECLARING, specifying whether + this is a declaration that we want to warn about, if there + is more than one of them. All uses changed. + + * data/glr.c, data/glr.cc, data/lalr1.cc, data/yacc.c: + Allow multiple %union directives, whose contents concatenate. + * src/parse-gram.y (grammar_declaration): Likewise. + Use muscle_code_grow, so that we don't need stype_line any more. + All uses changed. + + * src/muscle_tab.c (muscle_grow): Fix comment. + + * ChangeLog, data/c.m4, data/glr.c, data/glr.cc, data/location.cc: + * data/yacc.c, src/getargs.c, src/output.c, tests/cxx-type.at: + Update copyright year to 2006. + +2006-01-03 Akim Demaille + + Have glr.cc pass (some of) the calc.at tests. + * data/glr.cc (b4_parse_param_orig): New. + (b4_parse_param): Improve its definition, and bound it more + clearly in the skeleton. + (b4_epilogue): Append, instead of prepending, in order to keep + #line consistency. + Simplify the generation of auxiliary functions: locations and + purity are mandated. + (b4_global_tokens_and_yystype): Honor it. + * data/location.cc (c++.m4): Don't include it. + * tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Define AT_GLR_CC_IF + and AT_SKEL_CC_IF. + * tests/calc.at (AT_CHECK_CALC): Rely on AT_SKEL_CC_IF instead of + AT_LALR1_CC_IF. + Be sure to initialize the first position's filename. + (AT_CHECK_CALC_LALR1_CC): Add %location and %defines, they are + mandated anyway. + (AT_CHECK_CALC_GLR_CC): New. + Use it to exercise glr.cc as a lalr1.cc drop-in replacement. + +2006-01-02 Akim Demaille + + * src/output.c (output_skeleton): Don't hard wire the inclusion of + c.m4. + * data/c++.m4, data/glr.c, data/yacc.c: Include c.m4. + * data/glr.cc: Do not include stack.hh. + +2006-01-02 Joel E. Denny + + * data/glr.c: Reformat whitespace with tabs. + (b4_lpure_formals): Remove this unused m4 macro. + * tests/cxx-type.at: Reformat whitespace with tabs. + (_AT_TEST_GLR_CXXTYPES): In union Node, rename node_info to nodeInfo + since it's a member. Rename type to isNterm for clarity. + +2005-12-29 Akim + + Let glr.cc catch up with symbol_value_print. + * data/glr.cc (b4_yysymprint_generate): Replace by... + (b4_yy_symbol_print_generate): this. + (yy_symbol_print, yy_symbol_value_print): Declare them. + +2005-12-28 Paul Eggert + + * src/location.h (boundary): Note that a line or column equal + to INT_MAX indicates an overflow. + * src/scan-gram.l: Include verify.h. Don't include get-errno.h. + (rule_length_overflow, increment_rule_length, add_column_width): + New functions. + ({id}, "\"", "'"): + ("}"): + Use increment_rule_length rather than incrementing it by hand. + (adjust_location, handle_syncline): Diagnose overflow. + (handle_action_dollar, handle_action_at): + Fix bug with monstrosities like $-2147483648. + Remove now-unnecessary checks. + (scan_integer): Verify assumptions and remove now-unnecessary checks. + (convert_ucn_to_byte): Verify assumptions. + (handle_syncline): New arg LOC. All callers changed. + Don't store through a value derived from char const * pointer. + + * src/reader.c (grammar_rule_check): Rewrite slightly to avoid + GCC warnings. + +2005-12-27 Paul Eggert + + * src/reader.c (grammar_midrule_action, grammar_symbol_append): + Remove unnecessary forward static decls. + +2005-12-27 Akim Demaille + + * src/reader.c (grammar_current_rule_check): Also check that $$ + is used. + Take the rule to check as argument, hence rename as... + (grammar_rule_check): this. + * src/reader.h, src/reader.c (grammar_rule_begin, grammar_rule_end): + Rename as... + (grammar_rule_begin, grammar_rule_end): these, for consistency. + (grammar_midrule_action, grammar_symbol_append): Now static. + * tests/torture.at (input): Don't rely on the default action + being always performed. + * tests/calc.at: "Set" $$ even when the action is "cut" with + YYERROR or other. + * tests/actions.at (Exotic Dollars): Instead of using unused + values, check that the warning is issued. + +2005-12-22 Paul Eggert + + * NEWS: Improve wording for unused-value warnings. + +2005-12-22 Akim Demaille + + * data/lalr1.cc, data/yacc.c, data/glr.c, data/c.m4 + (b4_yysymprint_generate): Rename as... + (b4_yy_symbol_print_generate): this. + Generate yy_symbol_print instead of yysymprint. + Generate also yy_symbol_value_print, and use it. + 2005-12-22 Akim Demaille - Warn about unused values. + * NEWS: Warn about unused values. * src/symlist.h, src/symlist.c (symbol_list, symbol_list_new): Add a `used' member. (symbol_list_n_get, symbol_list_n_used_set): New. @@ -14995,8 +15252,8 @@ ----- Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996, - 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software - Foundation, Inc. + 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free + Software Foundation, Inc. Copying and distribution of this file, with or without modification, are permitted provided the copyright notice and this