X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/2c2b72205a56abe1d4a9be3633fc1529188b35bc..a2ea208d82fdd67257d16e11b93ab17a8c48d452:/ChangeLog diff --git a/ChangeLog b/ChangeLog index 3f9eda0b..40c7b877 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,456 @@ +2007-08-03 Joel E. Denny + + * data/yacc.c (yyexhaustedlab): Define it when YYERROR_VERBOSE is + true since it's then always used regardless of whether yyoverflow is + defined. Reported by Christian Burger at + . + * THANKS: Add Christian Burger. + +2007-07-28 Joel E. Denny + + * src/muscle_tab.c (muscle_percent_define_flag_if): In order to + determine whether this function has already complained about an invalid + value for a %define boolean variable, don't check whether Bison has + ever examined the value. As written, the check was a tautology. + Instead, record and check for this complaint using a separate muscle. + +2007-07-27 Joel E. Denny + + Fix push parsing memory leak reported by Brandon Lucia at + . + * THANKS: Add Brandon Lucia. + * data/push.c (yypstate_delete): Free the stack if it was reallocated + but the parse never completed and thus freed it. + * tests/Makefile.am (TESTSUITE_AT): Add push.at. + * tests/testsuite.at: Include push.at. + * test/push.at: New. + (Push Parsing: Memory Leak for Early Deletion): New test case. + +2007-07-17 Joel E. Denny + + Improve handling of multiple S/R conflicts in the same state and of S/R + conflicts involving multiple reductions. + * src/conflicts.c (resolve_sr_conflict): Don't assign the error action + set for a state here or Bison will abort if it is reassigned on a + later conflicted reduction in the same state. + Similarly, don't finalize and assign the solved conflicts report here + or it will be lost if it is reassigned on a later conflicted reduction + in the same state. + (set_conflicts): Instead, assign them both here after all S/R conflicts + in the state have been fully examined. + * src/print.c (shift_set): Rename to... + (no_reduce_set): ... this. + (print_reductions): Update for rename, and add %nonassoc error action + tokens to no_reduce_set so that, when printing the first remaining + reduction on an error action token, the reduction is enclosed in + brackets. + (print_results): Update for rename. + * tests/conflicts.at (Solved conflicts report for multiple reductions + in a state): New test case. + (%nonassoc error actions for multiple reductions in a state): New test + case. + + * src/main.c (main): Don't depend on C99 features. + +2007-07-16 Joel E. Denny + + * build-aux/.cvsignore: Add compile. + * lib/.cvsignore: Add charset.alias, ref-add.sed, ref-del.sed, and + uniwidth. + +2007-07-10 Joel E. Denny + + * bootstrap (slurp): Create target directories that don't exist. + Specifically, we need lib/uniwidth/ because of recent Gnulib changes. + +2007-07-09 Joel E. Denny + + * LR0.c (new_itemsets): Fix wording in comments: say item index rather + than item number. + * closure.c (closure): Likewise. + * state.h (reductions): Comment sorting of rules. + (state): Comment sorting of items. + +2007-07-02 Joel E. Denny + + Fix C++ test cases after recent Gnulib changes. Discussed starting at + . + * examples/calc++/Makefile.am (DEFAULT_INCLUDES): Override Automake's + definition in order to avoid Gnulib headers since we don't use config.h + here. + * tests/output.at (AT_CHECK_OUTPUT_FILE_NAME): Use AT_DATA_GRAMMAR + rather than AT_DATA so that config.h is included. + +2007-07-01 Joel E. Denny + + * data/glr.c (yy_yypstack, yypstates, yypdumpstack): Use YYFPRINTF + instead of fprintf. Guard these functions with #if YYDEBUG instead of + #ifdef YYDEBUG for consistency with all other uses of YYDEBUG in Bison + and so that YYFPRINTF is guaranteed to be defined here. + +2007-05-29 Joel E. Denny + + * src/muscle_tab.c (muscle_percent_define_invalid_value): Replace + with... + (muscle_percent_define_check_values): ... this more helpful function. + Again, it's not used yet, but it will be. + * src/muscle_tab.h: Likewise. + + Improve some comments in parser table construction. + * src/LR0.c (new_itemsets): Explain sorting of itemset and kernel_base. + (generate_states): Don't mention ruleset, which is internal to closure. + * src/closure.c (closure): Explain sorting of core and itemset, which + is required for this function to behave correctly. + * src/closure.h (closure): Mention sorting. + +2007-05-28 Joel E. Denny + + * src/lalr.c (state_lookahead_tokens_count): For code readability, + move the check for disabled transitions to an aver since conflict + resolution hasn't happened yet. + + * src/lalr.c (state_lookahead_tokens_count): Remove the check that + labels a state as inconsistent just because it has error transitions. + The original form of this check appeared in revision 1.1 of lalr.c, + which was committed on 1991-12-21. Now (at least), changing the + consistency label on such a state appears to have no useful effect in + any of the places it is examined, which I enumerate below. The key + point to understanding each item in this enumeration is that a state + with an error transition is labelled consistent in the first place only + if it has no rules, so the check cannot matter for states that have + rules. (1) Labelling a state as inconsistent will cause set_conflicts + to try to identify its conflicts, and a state must have *rules* to have + conflicts. (2) Labelling a state as inconsistent will affect how + action_row sets the default *rule* for the state. (3) Labelling a + state as inconsistent will cause build_relations to add lookback edges + to *rules* in that state. + * src/state.h (struct state): Word the comment for member consistent + more carefully. + +2007-05-27 Joel E. Denny + + Don't depend on C99 features. + * src/conflicts.c (conflicts_update_state_numbers): Fix for-loop. + * src/lalr.c (lalr_update_state_numbers): Fix for-loop. + * src/reader.c (check_and_convert_grammar): Fix for-loop. + * src/state.c (state_mark_reachable_states): Fix for-loop. + (state_remove_unreachable_states): Fix for-loop. + + Don't widen struct state with member reachable just to temporarily + record reachability. Instead, use a local bitset. + * src/state.h (struct state): Remove member. + * src/state.c (state_new): Don't initialize it. + (state_mark_reachable_states): Rename to... + (state_record_reachable_states): ... this, and use bitset. + (state_remove_unreachable_states): Use bitset. + +2007-05-26 Joel E. Denny + + * src/Makefile.am (yacc): Quote target action commands properly so + that the yacc script isn't corrupt. Reported by Hans Aberg at + . + + * data/glr.c (yylval): As in yacc.c, don't extern in the header for + the case of pure parsers. Reported by Frans Englich at + . + * THANKS: Add Frans Englich. + + * NEWS (2.3a+): In the %code entry, reference section `Bison + Declaration Summary' from the manual now since the %code summary has + moved there. + * doc/bison.texinfo (Prologue Alternatives): Mention that directives + in the rules section must be terminated by semicolons. + +2007-05-20 Joel E. Denny + + 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 + + * 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 + + 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 + + Minor code cleanup in parser table construction. + * src/LR0.c (new_itemsets): Use item_number_is_symbol_number. + (new_itemsets, save_reductions): Update for rename to nitemset. + * src/closure.c (nritemset): Rename to... + (nitemset): ... this since the "r" appears to meaningless and isn't + used in the comments. + (closure): Update for rename. + * src/closure.h (nritemset): Update extern to... + (nitemset): ... this. + * src/lalr.c (LA): Fix a typo in comments. + * src/print.c (print_core): Update for rename to nitemset. + * src/print_graph.c (print_graph): Likewise. + * src/state.h: Fix some typos in header comments. + +2007-04-04 Paul Eggert + + * THANKS: Use ASCII for Sebastien Fricker's name. Bison source + still sticks to ASCII. Sorry! + + * README-hacking: New file, taken mostly from coreutils, with changes + for Bison. Contains much of the contents of: + * README-cvs: Remove. + * bootstrap: Sync from gnulib. + * build-aux/.cvsignore: Remove *.t, mkinstalldirs. + * lib/.cvsignore: Add wchar.h, wctype.h. Remove exit.h. + +2007-03-10 Joel E. Denny + + * doc/bison.texinfo (Destructor Decl): Fix typo reported by Sebastian + Setzer. + (Java Differences): Fix some typos. + * THANKS: Add Sebastian Setzer. + +2007-03-07 Paolo Bonzini + + * data/java.m4 (b4_single_class_if): Remove. + (b4_abstract_if): Look at "%define abstract". + (b4_lexer_if): New. + (b4_union_name): Rename... + (b4_yystype): ... to this. Map to "%define stype". + (b4_rhs_value, b4_parse_param_decl, b4_lex_param_decl, + b4_maybe_throws): Fix quoting. + (b4_lex_param_call): Move below to keep b4_*_param_decl close. + * data/lalr1.java (Lexer interface): Always define. + (Lexer interface within parser class): Remove. + (YYLexer class): New, used when "%code lexer" is present. + (constructor): When "%code lexer" is used, pass %lex-param + to the lexer constructor. + (yylex, yyparse): Remove %lex-param from method invocations + (YYStack, yyaction, yyparse): Rename b4_union_name to b4_yystype. + + * doc/bison.texinfo (Java Bison Interface): Mention "%define + abstract". Rename "%define union_name" to "%define stype". + Rename method names according to previous patch. + (Java Scanner Interface): Describe "%code lexer" instead of + "%pure-parser" and "%define single_class". + (Java Differences): Mention "%code lexer". + + * tests/java.at (_AT_DATA_JAVA_CALC_Y): Remove final argument. + Include scanner here, using macros from tests/local.at. + (AT_DATA_CALC_Y): Remove final argument. + (_AT_CHECK_JAVA_CALC): Likewise. + (AT_CHECK_JAVA_CALC): Likewise. Test all four combinations + of %locations and %error-verbose. + (main): Test with and without %lex-param. + * tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Push AT_LEXPARAM_IF. + (AT_BISON_OPTION_POPDEFS): Pop it. + +2007-03-07 Juan Manuel Guerrero + + DJGPP spefic issue. Inhibit the use of disallowed characters for + file name genertion on Win98, WinXP, etc. These are |<>":?*\ + and concern testsuite case 46. + * Makefile.am: djgpp/testsuite.sed added to EXTRA_DIST + * djgpp/testsuite.sed: Inhibit the use of disallowed characters. + * djgpp/config.bat: Inhibit the use of disallowed characters. + +2007-03-02 Joel E. Denny + + Miscellaneous %define and %code cleanup. + * data/bison.m4 (b4_percent_define_flag_if): Correct comments on how + values are interpreted. + * doc/bison.texinfo (Decl Summary): Clean up and extend %define + documentation a little more. + * src/muscle_tab.c (MUSCLE_USER_NAME_CONVERT, + muscle_percent_define_insert, muscle_percent_code_grow): New + functions/macros. + * src/muscle_tab.h (muscle_percent_define_insert, + muscle_percent_code_grow): Prototype. + * src/parse-gram.y (prologue_declaration): Use + muscle_percent_define_insert and muscle_percent_code_grow when parsing + %define and %code directives. + + Make it easy to share %define boolean variables between the front-end + and back-end. Though not used yet, this will be useful in the future. + * data/bison.m4 (b4_check_user_names): Rewrite comments to talk about + Bison uses of names rather than just skeleton uses of names. + (b4_percent_define_get, b4_percent_define_ifdef): Rename + b4_percent_define_skeleton_variables(VARIABLE) to + b4_percent_define_bison_variables(VARIABLE). + (b4_percent_code_get, b4_percent_code_ifdef): Rename + b4_percent_code_skeleton_qualifiers(QUALIFIER) to + b4_percent_code_bison_qualifiers(QUALIFIER). + (b4_check_user_names_wrap): Update for renames. + * src/muscle_tab.c, src/muscle_tab.h (muscle_percent_define_flag_if, + muscle_percent_define_default): New functions mimicking + b4_percent_define_flag_if and b4_percent_define_default. + + For %define variables, report locations for invalid values and + redefinitions. + * data/bison.m4 (b4_percent_define_flag_if): Read + b4_percent_define_loc(VARIABLE) to report the location of an invalid + value for VARIABLE. + (b4_percent_define_default): Save a special location in + b4_percent_define_loc(VARIABLE) in case the default value for VARIABLE + must later be reported as invalid. + * src/muscle_tab.c (muscle_location_grow, muscle_location_decode): New + functions. + (muscle_percent_define_insert): Record the location of VARIABLE in + muscle percent_define_loc(VARIABLE), and use it to report the previous + location for a redefinition. + (muscle_percent_define_flag_if): Update like b4_percent_define_flag_if. + (muscle_percent_define_default): Update like b4_percent_define_default. + (muscle_grow_user_name_list): Rename to... + (muscle_user_name_list_grow): ... this for consistency and use + muscle_location_grow. + * src/muscle_tab.h (muscle_location_grow): Prototype. + * tests/input.at (%define errors): Update expected output. + * tests/skeletons.at (%define boolean variables: invalid skeleton + defaults): New test case. + +2007-02-28 Joel E. Denny + + * src/print.c (lookahead_set, state_default_rule): Remove. + (print_reductions): Replace state_default_rule invocation with + equivalent use of yydefact, which was computed in token_actions in + tables.c. + (print_results): Don't allocate lookahead_set. + +2007-02-27 Paolo Bonzini + + * data/lalr1.java: Prefix all private members with yy. + +2007-02-24 Joel E. Denny + + Use YYFPRINTF instead of fprintf where appropriate. Reported by + Sebastien Fricker at + . + * THANKS: Add Sebastien Fricker. + * data/glr.c, data/push.c, data/yacc.c (yy_reduce_print): Implement. + * doc/bison.texinfo (Tracing): Make it clearer that YYFPRINTF must + accept a variable number of arguments. + +2007-02-19 Joel E. Denny + + * bootstrap: Remove occurrences of .#bootmp from lib/Makefile. + +2007-02-13 Juan Manuel Guerrero + + * djgpp/config.bat: Adjustments concerning the use of autoconf 2.61. + * djgpp/config.sed: Adjustments concerning the use of autoconf 2.61. + * djgpp/config.site: Adjustments concerning the use of autoconf 2.61. + +2007-02-11 Paul Eggert + + Undo my 2007-02-07 change, switching back to the c-strcase module + introduced in the 2007-02-03 change. Bruno Haible reported that + the 2007-02-07 change would be dangerous in Turkish if we add a + language whose name contains "i", since "i" is not lowercase "I" + in Turkish. + * bootstrap.conf (gnulib_modules): Add c-strcase. Remove strcase. + * lib/.cvsignore: Add c-ctype.c, c-ctype.h, c-strcase.h, + c-strcasecomp.c, c-strncasecmp.c. Remove strcasecmp.c, strncasecmp.c. + * m4/.cvsignore: Remove strcase.m4. + * src/getargs.c: Revert 2007-02-07 change, as follows. + Include c-strcase.h. + (language_argmatch): Use c_strcasecmp rather than strcasecmp. + +2007-02-11 Bruno Haible + + Enable the Java related testsuite tests when the only Java compiler + found is a gcj < 4.3. Discussed at + . + * configure.ac (gt_JAVACOMP): Don't specify a target_version. + +2007-02-11 Joel E. Denny + + * data/Makefile.am: Update copyright date. + * data/push.c (yypull_parse): Report memory exhaustion and return 2 if + yypstate_new returns NULL. + (yypstate_new): Return NULL if malloc does. + * src/reader.c (packgram): Move translation of rule actions from the + beginning of packgram to... + (check_and_convert_grammar): ... here right before packgram is invoked + so it's easier to write more complete comments, and remove redundant + code. + +2007-02-10 Joel E. Denny + + As in semantic actions, make @$ in %initial-action, %destructor, and + %printer imply %locations. + * src/scan-code.l (SC_SYMBOL_ACTION): Set locations_flag = true when + scanning @$. + * tests/actions.at (AT_CHECK_ACTION_LOCATIONS): New macro supporting... + (@$ in %initial-action implies %locations, + @$ in %destructor implies %locations, + @$ in %printer implies %locations): ... these new test cases. + +2007-02-07 Paul Eggert + + Undo most of the 2007-02-03 change, switching to the strcase module + now that gnulib strcase has been fixed. + * bootstrap.conf (gnulib_modules): Remove c-strcase. Add strcase. + * lib/.cvsignore: Remove c-ctype.c, c-ctype.h, c-strcase.h, + c-strcasecomp.c, c-strncasecmp.c. Add strcasecmp.c, strncasecmp.c + * m4/.cvsignore: Add strcase.m4. + * src/getargs.c: Revert 2007-02-03 change, as follows. + Don't include c-strcase.h. + (language_argmatch): Use strcasecmp rather than c_strcasecmp. + strcasecmp has "unspecified behavior" outside the POSIX locale, + but it works fine in practice if at least one argument is ASCII, + as is the case in Bison. + +2007-02-07 Paolo Bonzini + + * tests/java.at: Skip tests if only one of javac/java is present. + Reported by Joel E. Denny. + * tests/atlocal.in: Adjust copyright years. + +2007-02-05 Paolo Bonzini + + * data/lalr1.java (Stack): Work around old verifiers that disallow + access to the private fields of an inner class, from the outer class. + We can make Stack's fields public because user code doesn't have access + to the instance of Stack used by parse(). Reported by Paul Eggert. + 2007-02-03 Paul Eggert * .cvsignore: Add javacomp.sh, javaexec.sh. Is this really