X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/e557d3eac61c5ffc36c1c19930fd6f4ee4a15555..3eb82471faaf77cb1d0677d6bf7c0e65f432519e:/ChangeLog?ds=sidebyside diff --git a/ChangeLog b/ChangeLog index a1e77d44..cd74bed8 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,1423 @@ +2007-01-28 Joel E. Denny + + Clean up. + * src/scan-skel.l (at_directive_perform): Add at_directive_argc and + at_directive_argv arguments so these no longer have to be global + variables. Also, update the implementation for the following changes. + (fail_for_at_directive_too_many_args, + fail_for_at_directive_too_few_args): Add at_directive_name argument. + (at_directive_name): Remove as at_directive_argv[0] will be used for + this now. + (AT_DIRECTIVE_ARGC_MAX): Increment to make space in at_directive_argv + for the directive name. + (at_directive_argc, at_directive_argv): Make these local within + skel_lex instead of global. + (INITIAL): Update directive start action for above changes. + (SC_AT_DIRECTIVE_ARG): Rename to... + (SC_AT_DIRECTIVE_ARGS): ... this, and update for above changes. + (SC_AT_DIRECTIVE_SKIP_WS): Update. + (scan_skel): Move yylex_destroy to... + (skel_scanner_free): ... here. + * tests/skeletons.at (installed skeleton file name): Rename to... + (installed skeleton file names): ... this. + +2007-01-27 Joel E. Denny + + * ChangeLog: For changes in doc/bison.texinfo, consistently reference + node names: say "Table of Symbols" not "Bison Symbols", and say "Decl + Summary" not "Directives". + * doc/bison.texinfo (Decl Summary, Calc++ Parser): Cross-reference the + %code entry in "Decl Summary" rather than the one in "Table of Symbols" + since the former is now the more complete one. + (Prologue Alternatives): Likewise and do the same for %defines. + (Table of Symbols): Add summary of %code, add summary of %define, and + move full %code documentation to... + (Decl Summary): ... here for consistency with other entries in these + sections. + Move %define entry in order to keep this list alphabetized. + Reword %define entry a little to put less emphasis on the skeleton + concept, which most users shouldn't have to think about. + +2007-01-26 Paul Eggert + + Adjust to recent gnulib changes. + * lib/.cvsignore: Remove stpcpy.h, strndup.h, strnlen.h. + Add string.h, string_.h, unistd_.h, wchar_.h. + * m4/.cvsignore: Add gnulib-common.m4, string_h.m4, wchar.m4. + * src/system.h: Don't include ; this is now done by + . + +2007-01-23 Paolo Bonzini + + Simplify implementation of unqualified %code, implement macros for + uniform treatment of boolean %define flags. Document %define. + * data/bison.m4 (b4_percent_define_ifdef, b4_percent_define_flag_if, + b4_percent_code_ifdef): New. + (b4_percent_code_get): Map unqualified %code to b4_percent_code(). + * data/c++.m4: Define default value for global_tokens_and_yystype. + * data/glr.cc: Likewise. + * data/location.cc: Use b4_percent_define_flag_if. + + * doc/bison.texinfo (Decl Summary): Document %define. + + * src/parse-gram.y (Unqualified %code): Change muscle name to + b4_percent_code(). + (content.opt): Default to empty. + +2007-01-17 Joel E. Denny + + Implement support for relative and absolute skeleton file names. + Discussed starting at + . + * doc/bison.texinfo (Decl Summary): Document in %skeleton entry. + (Bison Options): Document in --skeleton entry. + * src/output.c (output_skeleton): Use strncpy rather than strcpy since + full_skeleton can't necessarily hold all of pkgdatadir. + If the specified skeleton file name contains a `/', don't prepend + pkgdatadir. + * src/parse-gram.y (prologue_declaration): If the specified skeleton + file name contains a `/', prepend the grammar file directory. + * tests/Makefile.am (TESTSUITE_AT): Add skeletons.at. + * skeletons.at: New file. + (relative skeleton file names): New test case. + (installed skeleton file names): New test case. + * tests/testsuite.at: Include skeletons.at. + + * bootstrap: Update copyright to 2007. + +2007-01-17 Paolo Bonzini + + * bootstrap: Remove occurrences of .#bootmp from the files. + +2007-01-17 Akim Demaille + + * doc/bison.texinfo (Calc++ Parser): Don't try to alias + nonterminals. + Use per-type %printer. + +2007-01-17 Joel E. Denny + + * NEWS, data/c++-skel.m4, data/c++.m4, data/c-skel.m4, data/c.m4, + data/glr.c, data/glr.cc, data/lalr1.cc, data/location.cc, + djgpp/config.site, src/files.c, src/files.h, src/main.c, + src/muscle_tab.c, src/muscle_tab.h, src/parse-gram.y, src/reader.h, + src/scan-skel.h, src/scan-skel.l, tests/actions.at, tests/calc.at, + tests/glr-regression.at, tests/input.at, tests/local.at, + tests/output.at, tests/torture.at: Update copyright to 2007. + +2007-01-16 Akim Demaille + + * doc/bison.texinfo (Calc++ Parsing Driver): Let "parse" return an + error code. + (Calc++ Scanner): Exit with failure if we can't open the input + file. + Accept "-" standing for stdin. + (Calc++ Top Level): Print the result only if the parsing was + successful. + +2007-01-16 Akim Demaille + + * data/lalr1.cc (yy_reduce_print_): Add a missing end-of-line. + +2007-01-15 Paolo Bonzini + and Joel E. Denny + + Clean up %define and %code implementation in M4 some. Most + importantly, rename all related macros to be in the b4_percent_define + and b4_percent_code namespaces. Also, complete support for `.' in + %define variable names and %code qualifiers. + * data/bison.m4 (b4_check_user_names): Check for special + "SKELETON-NAMESPACE(name)" macros instead of using two nested + m4_foreach loops. + (b4_get_percent_define, b4_get_percent_code): Rename to... + (b4_percent_define_get, b4_percent_code_get): ... these. + Extend documentation with examples. + For SKELETON-NAMESPACE (as documented for b4_check_user_names), use + b4_percent_define_skeleton_variables and + b4_percent_code_skeleton_qualifiers. + Expect any value for the %define variable `foo' to be stored in the + macro named `b4_percent_define(foo)'; expect any %code blocks for the + qualifier `foo' to be stored in a macro named `b4_percent_code(foo)'; + expect any unqualified %code blocks to be stored in a macro named + `b4_percent_code_unqualified'. + Use m4_indir so that %define variable names and %code qualifiers can + contain `.', which is allowed by the grammar parser. + (b4_percent_define_default): New macro to set a default value for a + %define variable. + (m4_wrap): Update wrapped code, and fix some underquoting. + (b4_check_user_names_wrap): Update and define outside the m4_wrap. + Expect grammar uses of %define variables and %code qualifiers to be + defined in b4_percent_define_user_variables and + b4_percent_code_user_qualifiers. + * data/c++.m4: Use b4_percent_define_default rather than + m4_define_default. Fix some underquoting. Skeleton usage of %define + variable define_location_comparison now implies skeleton usage of + %define variable filename_type. + * data/glr.c, data/glr.cc, data/lalr1.cc, data/location.cc, + data/push.c, data/yacc.c: Update macro names. + * src/parse-gram.y (prologue_declaration, grammar_declaration): Update + muscle names. + +2007-01-14 Juan Manuel Guerrero + + DJGPP specific issues. + + * djgpp/config.site: Set ac_cv_path_mkdir to a sane DJGPP specific + default. Set gl_cv_absolute_wctype_h to a sane DJGPP specific default. + +2007-01-09 Joel E. Denny + + * tests/glr-regression.at: Use AT_PARSER_CHECK rather than AT_CHECK to + run parsers in all tests so that Valgrind is invoked during + maintainer-check-valgrind. + (Duplicate representation of merged trees): Free all semantic values. + (Duplicated user destructor for lookahead): Likewise. + +2007-01-09 Joel E. Denny + + * tests/local.at (AT_PARSER_CHECK): Add a PRE argument to specify a + command-line prefix. + * tests/torture.at (Exploding the Stack Size with Alloca): Stderr is + ignored, so use that PRE to set --log-fd=1 in VALGRIND_OPTS so we don't + miss Valgrind messages. + (Exploding the Stack Size with Malloc): Likewise. + +2007-01-09 Joel E. Denny + + Ignore YYSTACK_USE_ALLOCA for push parsers since the stacks can't be + locals. Reported by Juan Manuel Guerrero at + . + * data/push.c: Enclose the #ifdef YYSTACK_USE_ALLOCA in b4_push_if. + Fix some indentation also. + * tests/torture.at (Exploding the Stack Size with Alloca): Add comment + explaining this issue. + +2007-01-09 Paolo Bonzini + and Joel E. Denny + + Simplify union and prologue handling, and escape union and lex/parse + params with digraphs. + * data/bison.m4 (b4_pre_prologue, b4_post_prologue): Set their default + values to the empty string since these are no longer guaranteed + initialized by the front-end. + * data/glr.c, data/glr.cc, data/lalr1.cc, data/push.c, data/yacc.c: Add + braces around b4_user_stype since this is no longer done by the + front-end. + * src/files.c, src/files.h (pre_prologue_obstack, + post_prologue_obstack): Remove. + * src/muscle_tab.c (muscle_pair_list_grow): Don't duplicate header + comments here. Use MUSCLE_OBSTACK_SGROW so that values are escaped + with digraphs. This fixes lex params and parse params. + * src/muscle_tab.h (muscle_pair_list_grow): Update comments. + * src/output.c (prepare): Remove muscle insertion of the prologues. + (output): Remove freeing of pre_prologue_obstack and + post_prologue_obstack. + * src/parse-gram.y (prologue_declaration): Use muscle_code_grow rather + than prologue_augment for prologue parsing so you don't need prologue + obstacks. + (grammar_declaration): For %union RHS, use `braceless' instead of + "{...}" so that braces are already stripped and code is escaped with + digraphs. + * src/reader.c (prologue_augment): Remove. + (reader): Remove initialization of pre_prologue_obstack and + post_prologue_obstack. + * src/reader.h (prologue_augment): Remove. + + * data/c.m4: Remove stray parenthesis. + +2007-01-08 Joel E. Denny + + Remove quotes from variables names in %define directives and from + qualifiers in %code directives, and restrict the characters that are + allowed in them to M4-friendly ones. For %define, continue to support + the quoted form as a deprecated feature. Discussed starting at + . + * NEWS (2.3a+): Add entry for the change to %define. Update entry for + %code. + * doc/bison.texinfo (Prologue Alternatives): Update. + (Bison Declaration Summary): In %defines entry, update mention of + `%code requires' and `%code provides'. + (C++ Location Values): Update %define uses. + (Calc++ Parser Interface): Likewise. + (Calc++ Parser): Likewise, and update `%code requires' uses. + (Table of Symbols): Update %code documentation. + * src/parse-gram.y (prologue_declaration): For %define variables, use + `variable' instead of `STRING'. + (grammar_declaration): For %code qualifiers, use `ID' instead of + `STRING'. + (variable): New nonterminal that takes an `ID' or a `STRING'. + * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Update %code + and %define uses. + * tests/calc.at (_AT_DATA_CALC_Y): Update %define use. + * tests/input.at (Reject unused %code qualifiers): Update %code uses. + (%define errors): Update %define uses. + +2007-01-08 Joel E. Denny + + * src/parse-gram.y (prologue_declaration): Use MUSCLE_INSERT_STRING + instead of muscle_insert for %define values so that M4-special + characters are replaced with digraphs. + * tests/input.at (%define errors): Extend to check weird values. + +2007-01-08 Joel E. Denny + + Instead of having skeletons declare all valid %define variables and + %code qualifiers, provide macros that retrieve the associated values + and build these lists automatically. Thus Bison will now warn when a + variable or qualifier is not used by the skeleton in the current + invocation regardless of whether it might sometimes be used by that + skeleton in other invocations. Also, move all %define value macros to + the b4_percent_define_ namespace, and remove the %define "NAME" {CODE} + form, which is replaced by %code. + * data/bison.m4 (b4_check_for_unrecognized_names): Rename to... + (b4_check_user_names): ... this, and change the series of valid name + arguments to a single list argument for names used in the skeleton + similar to the existing list argument for names used in the grammar. + Warn instead of complaining. + (b4_get_percent_define, b4_get_percent_code): New to retrieve %define + values and %code code, to format %code code properly, and to build + lists of all %define variables and %code qualifiers used in the + skeleton: b4_skeleton_percent_define_variables and + b4_skeleton_percent_code_qualifiers. + (b4_check_percent_define_variables, b4_check_percent_code_qualifiers): + Remove, and... + (m4_wrap): ... m4_wrap b4_check_user_names invocations instead so that + the skeleton names lists can finish building first. In place of + b4_used_percent_define_variables and b4_used_percent_code_qualifiers, + expect the lists b4_user_percent_define_variables and + b4_user_percent_code_qualifiers. + * data/c++.m4: Where setting default values for b4_parser_class_name, + b4_location_type, b4_filename_type, b4_namespace, and + b4_define_location_comparison, update their names to the + b4_percent_define_ namespace. + * data/glr.c: Don't use b4_check_percent_define_variables and + b4_check_percent_code_qualifiers. Use b4_get_percent_code. + * data/glr.cc, data/lalr1.cc: Likewise, and use b4_get_percent_define. + (b4_parser_class_name, b4_namespace): Define these using + b4_get_percent_define for parser_class_name and namespace. + * data/location.cc: Use b4_get_percent_define. + * data/push.c: Don't use b4_check_percent_define_variables and + b4_check_percent_code_qualifiers. Use b4_get_percent_code. + * data/yacc.c: Likewise, and don't call m4_exit in + b4_use_push_for_pull_if or m4_wrap code will never execute. + * src/muscle_tab.c, src/muscle_tab.h (muscle_grow_used_name_list): + Rename to... + (muscle_grow_user_name_list): ... this for consistency with the + terminology used in bison.m4. + * src/parse-gram.y (prologue_declaration): Prepend "percent_define_" to + %define variable names, and rename muscle used_percent_define_variables + to user_percent_define_variables. + (grammar_declaration): Rename muscle used_percent_code_qualifiers to + user_percent_code_qualifiers. + (content): Remove. + (content.opt): Replace content RHS with STRING RHS so %define "NAME" + {CODE} form is no longer accepted. + * tests/input.at (Reject bad %code qualifiers): Rename to... + (Reject unused %code qualifiers): ... this, and update test output. + (%define error): Update test output. + +2007-01-07 Joel E. Denny + + Check for unrecognized %define variables similar to checking for + unrecognized %code qualifiers. Check for redefined %define variables. + * data/bison.m4 (b4_check_for_unrecognized_names): New macro that + generalizes... + (b4_check_percent_code_qualifiers): ... this, which now wraps it. + (b4_check_percent_define_variables): New, also wraps it. + * data/glr.c: Unless glr.cc is wrapping glr.c, declare no valid %define + variables using b4_check_percent_define_variables. + * data/glr.cc, data/lalr1.cc: Declare the valid %define variables as + all those exercised in the test suite and all those listed in the + `Default values' section of c++.m4. Are there others? + * data/push.c, data/yacc.c: Declare no valid %define variables. + * src/muscle_tab.c, src/muscle_tab.h (muscle_find_const): New function, + similar to muscle_find, but it works even when the muscle stores a + const value. + (muscle_grow_used_name_list): New function for constructing the used + name list muscles that b4_check_for_unrecognized_names requires. + * src/parse-gram.y (prologue_declaration): Warn if a variable is + %define'd more than once. Define the b4_used_percent_define_variables + muscle with muscle_grow_used_name_list. + (grammar_declaration): Abbreviate %code code with + muscle_grow_used_name_list. + * tests/input.at (%define errors): New. + +2007-01-06 Joel E. Denny + + Provide warn_at, complain_at, and fatal_at function callbacks to the + skeletons, and use this for %code qualifier complaints. + * data/bison.m4 (b4_error_at): New, invoked by... + (b4_warn_at, b4_complain_at, b4_fatal_at): ... these new macros to wrap + the skeleton scanner's new @warn_at(...@), @complain_at(...@), and + @fatal_at(...@) directives. + (b4_check_percent_code_qualifiers): Rewrite to expect locations for + qualifiers in b4_used_percent_code_qualifiers and to use + b4_complain_at. + * src/location.c, src/location.h (boundary_set_from_string): New global + function. + * src/muscle_tab.c, src/muscle_tab.h (muscle_boundary_grow): New global + function. + * src/parse-gram.y (grammar_declaration): Add locations for qualifiers + to b4_used_percent_code_qualifiers. + * src/scan-skel.l (fail_for_at_directive_too_few_args): New static + function. + (AT_DIRECTIVE_ARGC_MAX): Increase for boundary arguments. + (lineno): Rename to... + (out_lineno): ... this so I don't misunderstand it again. + (SC_AT_DIRECTIVE_SKIP_WS): Don't increment out_lineno for newlines + here; these newlines are in the input but not the output file. + (SC_AT_DIRECTIVE_ARG): Likewise. Extract directive execution to... + (at_directive_perform): ... this new static function, and add handling + of new @warn_at(...@), @complain_at(...@), and @fatal_at(...@) + directives. + * tests/input.at (Reject bad %code qualifiers): Update test output with + locations and extend. + + * tests/output.at (Output file name: [, Output file name: ]): Remove + bogus comment about these tests failing. + +2007-01-06 Joel E. Denny + + Clean up b4_check_percent_code_qualifiers a little. + * data/bison.m4 (b4_check_percent_code_qualifiers): Expect qualifiers + in b4_used_percent_code_qualifiers to be double-M4-quoted. Rewrite + documentation and add examples. + * src/parse-gram.y (grammar_declaration): Double-M4-quote those + qualifiers here. + +2007-01-05 Joel E. Denny + + Don't use m4_divert since it makes m4_divert_push and m4_divert_pop + unreliable -- especially when they're hidden inside another macro. + * data/bison.m4, data/c++-skel.m4, data/c++.m4, data/c-skel.m4, + data/c.m4: Remove m4_divert(-1). + * data/glr.c, data/glr.cc, data/lalr1.cc, data/location.cc, + data/push.c, data/yacc.c: Likewise, and replace m4_divert(0) with + m4_divert_push(0) and m4_divert_pop(0). + * src/output.c (output_skeleton): Don't add an m4_divert_push(0) and + an m4_wrap([m4_divert_pop(0)]) to the M4. Diversion -1, which is + pushed and popped by m4sugar, should be first on the stack. + + Provide warn, complain, and fatal function callbacks to the skeletons. + This provides more flexibility than m4_fatal, improves the error + message format, and captures messages for translation. Discussed + starting at + . + * data/bison.m4 (b4_error): New, invoked by... + (b4_warn, b4_complain, b4_fatal): ... these new macros to wrap the + skeleton scanner's new @warn(...@), @complain(...@), and @fatal(...@) + directives. Because these M4 macros might be called when the current + diversion is -1 or 0, m4_divert_push and m4_divert_pop is used; thus + the previous removal of uses of m4_divert, which caused trouble. + (b4_check_percent_code_qualifiers): Use b4_complain instead of + m4_fatal to report unrecognized %code qualifiers. + * data/c++-skel.m4: Use b4_complain instead of m4_fatal to report C++ + push parser requests. + * data/glr.c: Use b4_complain instead of m4_fatal to report + non-deterministic push parser requests. + Update @output usage to @output(...@) form. + * data/glr.cc, data/lalr1.cc: Use b4_fatal instead of m4_fatal to + report missing %defines. Update @output usage to @output(...@) form. + * data/location.cc, data/push.c, data/yacc.c: Update @output usage to + @output(...@) form. + * src/main.c (main): Invoke skel_scanner_free. + * src/scan-skel.h (skel_scanner_free): Prototype new function. + * src/scan-skel.l (FLEX_NO_OBSTACK): Don't define; we now need the + obstack_for_string from flex-scanner.h. + (YY_DECL): Use to declare skel_lex static. + (decode_at_digraphs): Remove; now handled in the new + SC_AT_DIRECTIVE_ARG start condition. + (fail_for_at_directive_too_many_args, fail_for_invalid_at): New static + functions. + (at_directive_name, AT_DIRECTIVE_ARGC_MAX, at_directive_argc, + at_directive_argv): New static globals. + (INITIAL): Use fail_for_invalid_at. + Don't parse `@output file_name\n' or `@basename(...@)'. Instead, + recognize the start of a generalized `@directive(...@)' form and + start... + (SC_AT_DIRECTIVE_ARG): ... this new start condition to parse the + directive args (using the new obstack_for_string), to decode the + contained @ diagraphs, and to perform the directive. It recognizes + @basename(...@), @warn(...@), @complain(...@), @fatal(...@), and + @output(...@). + (SC_AT_DIRECTIVE_SKIP_WS): New start condition started by + SC_AT_DIRECTIVE_ARG to skip whitespace after the argument delimiter, + `@,'. + (scan_skel): Initialize obstack_for_string on the first call. + (skel_scanner_free): New function to free obstack_for_string. + * tests/input.at (Reject bad %code qualifiers): Update test output. + +2007-01-04 Joel E. Denny + + Consolidate the 4 prologue alternative directives (%code, %requires, + %provides, and %code-top) into a single %code directive with an + optional qualifier field. Discussed at + . + * NEWS (2.3a+): Rewrite the existing entry for the prologue + alternatives. + * doc/bison.texinfo (Prologue Alternatives): Update. + (Decl Summary): Update to %code "requires" and %code "provides". + (Calc++ Parser): Update to %code "requires". + (Table of Symbols): Remove entries for %requires, %provides, and + %code-top. Rewrite %code entry, and add a %code "QUALIFIER" entry. + * data/bison.m4 (b4_user_provides, b4_user_requires): Remove as these + are replaced by b4_percent_code_provides and b4_percent_code_requires, + which are skeleton-specific. + (b4_check_percent_code_qualifiers): New. A skeleton can use this to + declare what %code qualifiers it supports and to complain if any other + qualifiers were used in the grammar. + * data/glr.cc: Update to use b4_user_code([b4_percent_code_requires]) + and b4_user_code([b4_percent_code_provides]) in place of + b4_user_requires and b4_user_provides. + * data/glr.c, data/lalr1.cc, data/push.c, data/yacc.c: Likewise. + Add b4_user_code([b4_percent_code_top]) and + b4_user_code([b4_percent_code]). + Invoke b4_check_percent_code_qualifiers. + * src/parse-gram.y (PERCENT_CODE_TOP, PERCENT_PROVIDES, + PERCENT_REQUIRES): Remove. + (grammar_declaration): Remove RHS's for %code-top, %provides, and + %requires. Rewrite the %code RHS as the unqualified form defining the + muscle b4_percent_code. Add another RHS for the qualified %code form, + which defines muscles of the form b4_percent_code_QUALIFIER and the + b4_used_percent_code_qualifiers muscle. + * src/scan-gram.l (PERCENT_CODE_TOP, PERCENT_PROVIDES, + PERCENT_REQUIRES): Remove. + * tests/actions.at (_AT_CHECK_PRINTER_AND_DESTRUCTOR): Update to use + %code "requires" and %code "provides". + * tests/input.at (Reject bad %code qualifiers): New. + +2007-01-03 Joel E. Denny + + Use the new code_props interface for destructors and printers. + * src/symtab.h (symbol, semantic_type): Remove destructor_location and + printer_location members, and change the type of the destructor and + printer members to code_props. + (symbol_destructor_set, symbol_destructor_get, symbol_printer_set, + symbol_printer_get, semantic_type_destructor_set, + semantic_type_printer_set, default_tagged_destructor_set, + default_tagless_destructor_set, default_tagged_printer_set, + default_tagless_printer_set): Use code_props in arguments and return + types in place of char const * and location. + (symbol_destructor_location_get, symbol_printer_location_get): Remove + since the locations are now contained in the return of + symbol_destructor_get and symbol_printer_get. + * src/output.c (symbol_destructors_output, symbol_printers_output): + Replace with... + (symbol_code_props_output): ... this to eliminate duplicate code. + (output_skeleton): Update to use symbol_code_props_output. + * src/reader.c (symbol_should_be_used): Update use of + symbol_destructor_get. + * src/symlist.c (symbol_list_destructor_set, symbol_list_printer_set): + Update uses of the various _destructor_set and _printer_set functions. + * src/symtab.c: (default_tagged_destructor_location, + default_tagless_destructor_location, default_tagged_printer_location, + default_tagless_printer_location): Remove since we... + (default_tagged_destructor, default_tagless_destructor, + default_tagged_printer, default_tagless_printer): ... change the type + of these to code_props. + (symbol_new, semantic_type_new, symbol_destructor_set, + semantic_type_destructor_set, symbol_destructor_get, + symbol_printer_set, semantic_type_printer_set, symbol_printer_get, + symbol_check_alias_consistency, default_tagged_destructor_set, + default_tagless_destructor_set, default_tagged_printer_set, + default_tagless_printer_set): Update. + (symbol_destructor_location_get, symbol_printer_location_get): Remove. + (SYMBOL_CODE_PRINT): New similar to SYMBOL_ATTR_PRINT but for + code_props members. + (symbol_print): Use SYMBOL_CODE_PRINT. + +2007-01-03 Joel E. Denny + + Use the new code_props interface for rule actions. + * src/symlist.h (symbol_list): Replace action, action_location, and + used members with a code_props action_props member. + * src/reader.c (symbol_should_be_used, grammar_rule_check, + grammar_midrule_action, grammar_current_rule_merge_set, + grammar_current_rule_symbol_append, packgram): Update. + * src/scan-code.h (translate_rule_action): Remove, no longer used. + * src/scan-code.l (handle_action_dollar): Update. + (translate_rule_action): Remove, no longer used. + * src/symlist.c (symbol_list_sym_new, symbol_list_syms_print): Update. + +2007-01-02 Joel E. Denny + + Use the new code_props interface in parse-gram.y. + * src/parse-gram.y (prologue_declaration, braceless, epilogue.opt): + Update all uses of translate_* functions to use the new code_props + interface and to use gram_scanner_last_string_free and + code_scanner_last_string_free where possible. + (grammar_declaration): symbol_list_destructor_set and + symbol_list_printer_set now perform the translation, so don't do it + here. Use gram_scanner_last_string_free where possible. + * src/scan-code.h, src/scan-code.l (translate_symbol_action, + translate_code): Remove, no longer used. + * src/symlist.h, src/symlist.c (symbol_list_destructor_set, + symbol_list_printer_set): Perform code translation here rather than + depending on the caller to do so. + + * src/symlist.h (struct symbol_list): Correct some documentation typos. + * src/scan-gram.h (gram_last_string): Remove declaration. + * src/scan-gram.l (last_string): Declare it static. + +2007-01-02 Joel E. Denny + + Encapsulate code properties and related functionality for the various + destructors, printers, and actions into a code_props structure and + interface. This patch merely implements code_props in scan-code.h and + scan-code.l. Future patches will rewrite other modules to use it. + Discussed starting at + . + * src/location.h (EMPTY_LOCATION_INIT): Define so that it's easier to + consistently initialize const structs that have an empty location + field. + * src/location.c (empty_location): Initialize with EMPTY_LOCATION_INIT + to ensure consistency. + * src/scan-code.h (code_props): New structure. + (code_props_none_init, CODE_PROPS_NONE_INIT, code_props_none): New + function, macro, and const global variable for initializing a + code_props with no code. + (code_props_plain_init, code_props_symbol_action_init, + code_props_rule_action_init, code_props_translate_code): The rest of + the new code_props functional interface. Among other things, the init + functions set the code_props kind field so that + code_props_translate_code will know whether to behave like + translate_symbol_action, translate_rule_action, or translate_code. + These old translate functions must remain until all other modules are + updated to use the new code_props interface. + (code_scanner_last_string_free): New function similar to + gram_scanner_last_string_free. + (code_scanner_free): Add documentation. + * src/scan-code.l: Implement the new interface. + (code_lex): Make it static, add a code_props* argument, and remove the + rule argument. + (last_string): New static global similar to the one in scan-gram.l. + (SC_RULE_ACTION): Update to use the code_props* argument to code_lex + instead of rule. + (SC_SYMBOL_ACTION): For $$, set the is_value_used member of the + code_props since Bison may one day use this information for destructors + and printers. + (<*><>): Use STRING_FINISH so that last_string is set. + (handle_action_dollar): Use symbol_list_n_get and set used flag + directly since symbol_list_n_used_set is removed. + (translate_action): Add a code_props* argument and remove the rule, + action, and location arguments. Pass the code_props* on to code_lex. + (translate_rule_action, translate_symbol_action, translate_code): + Rewrite as wrappers around the new code_props interface. + * src/symlist.h, src/symlist.c (symbol_list_n_used_set): Remove since + it would eventually need to break the encapsulation of code_props. + +2007-01-01 Joel E. Denny + + * etc/.cvsignore: New. + +2007-01-01 Joel E. Denny + + Add maintainer-push-check to run maintainer-check using push parsing in + place of pull parsing where available. + * Makefile.am (maintainer-push-check): New. + * data/bison.m4 (b4_use_push_for_pull_if): New. + * data/push.c: Redefine b4_push_if and b4_use_push_for_pull_if + appropriately based on their existing values. + (yypush_parse): Don't print push-parser-specific diagnostics if push + parsing is being used in place of pull parsing. + * data/yacc.c: If push parsing should replace pull parsing, redirect to + push.c. + * src/output.c (prepare): Check BISON_USE_PUSH_FOR_PULL environment + variable, and insert b4_use_push_for_pull_flag into muscles. + * tests/Makefile.am (maintainer-push-check): New. + +2006-12-31 Joel E. Denny + + * data/push.c (yypush_parse): Set yynew = 1 at the end of a parse + (whether successful or failed) so that yypush_parse can be invoked + again to start a new parse using the same yypstate. + * tests/torture.at (AT_DATA_STACK_TORTURE): For push mode, extend to + check multiple yypull_parse invocations on the same yypstate. For pull + mode, extend to check multiple yyparse invocations. + (Exploding the Stack Size with Alloca): Extend to try with + %push-pull-parser. + (Exploding the Stack Size with Malloc): Likewise. + + * tests/calc.at (Simple LALR Calculator): Don't specify + %skeleton "push.c" since %push-pull-parser implies that now. + * tests/headers.at (export YYLTYPE): Don't check for the push + declarations. Otherwise, this test case can't be used to see if push + mode can truly emulate pull mode. + * tests/input.at (Torturing the Scanner): Likewise. + * tests/local.at (AT_YACC_OR_PUSH_IF, AT_PUSH_IF): Remove. + (AT_YYERROR_SEES_LOC_IF): Rather than AT_YACC_OR_PUSH_IF, use + AT_YACC_IF, which now includes the case of push mode since %skeleton + need not be used for push mode. This will be more intuitive once + push.c is renamed to yacc.c. + +2006-12-31 Joel E. Denny + + For push mode, convert yyparse from a macro to a function, invoke yylex + instead of passing a yylexp argument to yypull_parse, and don't + generate yypull_parse or yyparse unless %push-pull-parser is declared. + Discussed starting at + . + * data/bison.m4 (b4_pull_if): New. + * data/c.m4 (b4_identification): Define YYPULL similar to YYPUSH. + * data/push.c: Improve M4 quoting a little. + (b4_generate_macro_args, b4_parenthesize): Remove. + (yyparse): If there's a b4_prefix, #define this to b4_prefix[parse] + any time a pull parser is requested. + Don't #define this as a wrapper around yypull_parse. Instead, when + both push and pull are requested, make it a function that does that + same thing. + (yypull_parse): If there's a b4_prefix, #define this to + b4_prefix[pull_parse] when both push and pull are requested. + Don't define this as a function unless both push and pull are + requested. + Remove the yylexp argument and hard-code yylex invocation instead. + * etc/bench.pl.in (bench_grammar): Use %push-pull-parser instead of + %push-parser. + * src/getargs.c (pull_parser): New global initialized to true. + * getargs.h (pull_parser): extern it. + * src/output.c (prepare): Insert pull_flag muscle. + * src/parse-gram.y (PERCENT_PUSH_PULL_PARSER): New token. + (prologue_declaration): Set both push_parser and pull_parser = true for + %push-pull-parser. Set push_parser = true and pull_parser = false for + %push-parser. + * src/scan-gram.l: Don't accept %push_parser as an alternative to + %push-parser since there's no backward-compatibility concern here. + Scan %push-pull-parser. + * tests/calc.at (Simple LALR(1) Calculator): Use %push-pull-parser + instead of %push-parser. + * tests/headers.at (export YYLTYPE): Make yylex static, and don't + prototype it in the module that calls yyparse. + * tests/input.at (Torturing the Scanner): Likewise. + * tests/local.at (AT_PUSH_IF): Check for %push-pull-parser as well. + +2006-12-26 Joel E. Denny + + Update etc/bench.pl. Optimize push mode a little (the yyn change + deserves most of the credit). + * Makefile.am (SUBDIRS): Add etc subdirectory. + * configure.ac (AC_CONFIG_FILES): Add etc/bench.pl and etc/Makefile. + * data/push.c (b4_declare_parser_state_variables): Move yyn, yyresult, + yytoken, yyval, and yyloc declarations to... + (yyparse or yypush_parse): ... here to improve performance. For + yypush_parse invocations after the first, be sure to assign yyn its old + value again. + (yypstate_new): Don't bother initializing the yyresult field since the + initial value isn't used. + (yyn, yyresult, yytoken, yyval, yyloc): For each NAME in this list, + remove the #define that, in push mode, set it to yyps->NAME. + * etc/Makefile.am: New. + * etc/bench.pl: Remove and build it instead from... + * etc/bench.pl.in: ... this new file. Use @abs_top_builddir@ to invoke + "tests/bison" from the build directory by default rather than just + invoking "bison" from $PATH. + (calc_grammar): Update push parser code: don't declare yylval globally, + don't define yyparse_wrapper, and don't #define yyparse. + (bench_grammar): Update to check all working combinations of yacc.c, + push.c, impure, pure, pull, and push. + +2006-12-25 Joel E. Denny + + For push mode, add pull wrappers around yypush_parse. + * data/push.c: (b4_generate_macro_args, b4_parenthesize): New macros. + (yypull_parse): New function wrapping yypush_parse. + (yyparse): New #define wrapping yypull_parse. + * tests/calc.at (_AT_DATA_CALC_Y): Call yyparse even when %push-parser + is declared. + * tests/headers.at (export YYLTYPE): Make yylex global. For push mode, + prototype yylex in the module that calls yyparse, and don't prototype + yyparse there. Otherwise, the yyparse expansion won't compile. + * tests/input.at (Torturing the Scanner): Likewise. + +2006-12-25 Joel E. Denny + + Enable push parsers to operate in impure mode. Thus, %push-parser no + longer implies %pure-parser. The point of this change is to move + towards being able to test the push parser code by running the entire + test suite as if %push-parser had been declared. + * data/push.c (yypush_parse): For impure mode, remove the + yypushed_char, yypushed_val, and yypushed_loc arguments. + Instead, declare these as local variables initialized to the global + yychar, yylval, and yylloc. + For the first yypush_parse invocation only, restore the initial values + of these global variables when it's time to read a token since they + have been overwritten. + * src/parse-gram.y (prologue_declaration): Don't set pure_parser for + %push-parser. + * tests/calc.at (Simple LALR(1) Calculator): Always declare + %pure-parser along with %push-parser since this test case was designed + for pure push parsers. + * tests/local.at (AT_PURE_OR_PUSH_IF): Remove unused. + (AT_YACC_OR_PUSH_IF): New. + (AT_YYERROR_SEES_LOC_IF): Fix enough that the test suite passes, but + add a note that it's still wrong for some cases (as it has been for a + while). + (AT_PURE_LEX_IF): Use AT_PURE_IF instead of AT_PURE_OR_PUSH_IF since + %push-parser no longer implies %pure-parser. + +2006-12-20 Joel E. Denny + + Remove some unnecessary differences between the pull parser code and + the push parser code. This patch enables yynerrs in push mode. + * data/push.c: Reformat M4 a little. + (b4_yyerror_range): Remove and convert all uses to just yyerror_range. + (b4_declare_scanner_communication_variables): Don't omit yynerrs just + because push mode is on. Instead, if pure mode is on, move yynerrs + to... + (b4_declare_parser_state_variables): ... here. + (yynerrs, yyerror_range): For push mode, #define each NAME in this list + to yyps->NAME so it can be used in yypush_parse. + (yypush_parse): Don't omit uses of yynerrs in push mode. + +2006-12-20 Joel E. Denny + + Fix bug such that the first pushed token's value and location are + sometimes overwritten (sometimes by %initial-action) before being used. + * data/push.c (yypush_parse): Rename arguments yynchar, yynlval, and + yynlloc to yypushed_char, yypushed_val, and yypushed_loc for clarity. + For the first yypush_parse invocation, initialize yychar to YYEMPTY to + more closely mimic the pull parser logic. + Don't copy the pushed token to yychar, yylval, and yylloc until it's + time to read a token, which is after any initialization of yylval and + yylloc. + (gottoken): Rename label to... + (yyread_pushed_token): ... for clarity and to avoid infringing on the + user namespace. + +2006-12-20 Joel E. Denny + + Rearrange initialization of the parser state variables so that the + skeleton doesn't have to have a copy for pull mode and another for push + mode. This patch also fixes at least a bug such that yylloc was not + initialized (with b4_location_initial_line and + b4_location_initial_column) upon calling yypush_parse. However, that + initialization now overwrites the first token's location; + %initial-action assigning @$ already did the same thing, and both bugs + will be fixed in a later patch. + * data/push.c (b4_yyssa): Remove and convert all uses to just yyssa. + (b4_declare_parser_state_variables): Remove initialization of yytoken, + yyss, yyvs, yyls, and yystacksize. + (yypstate_new): Remove initialization of some yypstate fields: yystate, + yyerrstatus, yytoken, yyss, yyvs, yyls, yystacksize, yyssp, yyvsp, and + yylsp. + (yyssa, yyvsa, yylsa): For push mode, #define each NAME in this list to + yyps->NAME so it can be used in yypush_parse. + (yyparse or yypush_parse): For yypush_parse, don't print the + "Starting parse" diagnostic for invocations after the first. + Add initialization of yytoken, yyss, yyvs, yyls, and yystacksize; for + yypush_parse, only do it for the first invocation. + Allow yystate, yyerrstatus, yyssp, yyvsp, yylsp, and yylloc + initialization to occur in yypush_parse but only on the first + invocation. + +2006-12-19 Joel E. Denny + + * data/push.c: Add CPP guards around push parser declarations in both + the header and the code file. + In the code file, move the push parser declarations to the same place + they appear in the header file. + Clean up the M4 some, especially the inconsistent underquoting in + some b4_c_function_def and b4_c_function_decl uses. + +2006-12-19 Joel E. Denny + + Encapsulate the push parser state variables into an M4 macro so the + push skeleton doesn't have to list them again for pull mode's yyparse. + For push mode, remove yypush_parse's local equivalents of these + variables to eliminate unnecessary copying between the two sets at + run-time. This patch also fixes at least a bug related to multiple + %initial-action invocations in push mode. + * data/push.c (b4_declare_parser_variables): Rename to... + (b4_declare_scanner_communication_variables): ... this for clarity and + update both uses. + (b4_declare_yyparse_variables): Remove and move its contents to the one + spot where it was invoked. + (b4_declare_parser_state_variables): New macro containing the parser + state variables required by push mode. + (struct yypstate): Replace all fields but yynew with + b4_declare_parser_state_variables. + (yystate, yyn, yyresult, yyerrstatus, yytoken, yyss, yyssp, yyvs, + yyvsp, yyls, yylsp, yystacksize, yyval, yyloc): For push mode, #define + each NAME in this list to yyps->NAME so it can be used in yypush_parse. + (yyparse or yypush_parse): For yyparse in pull mode, replace local + parser state variable declarations with + b4_declare_parser_state_variables. + Don't initialize parser state variables when calling yypush_parse since + yypstate_new already does that. + Invoke the user's initial action only upon the first yypush_parse + invocation. + Remove all code that copies between the local parser state variables + and the yypstate. + +2006-12-19 Joel E. Denny + + * data/push.c (union yyalloc): Rename yyss, yyvs, and yyls fields to + prevent a name collision in a future patch where these names will + sometimes be #define'd. + (YYSTACK_RELOCATE): Add an argument to select a union yyalloc field + since it no longer has the same name as the existing argument. + (yyparse or yypush_parse): Update all uses of YYSTACK_RELOCATE. + +2006-12-19 Paolo Bonzini + and Joel E. Denny + + * doc/bison.texinfo (Decl Summary): In the %language entry, mention + that the argument is case-insensitive, and there's no `=' here. + For the %skeleton entry, mention that %language is better. + (Bison Options): Likewise for --language and --skeleton. Move the + --skeleton entry so that the `Tuning the parser' section is sorted + alphabetically on long options. + (C++ Bison Interface): Don't use the word skeleton. Don't explain the + %language directive in detail here; cross-reference the %language + documentation instead. + (Calc++ Parser): Use `%require "@value{VERSION}"' rather than + `%require "2.3b"' so that the example is always up-to-date. + (Table of Symbols): Add entries for %language and %skeleton. + * examples/extexi (normalize): Instead of replacing every %require + argument with the current Bison version, just substitute for + `@value{VERSION}'. This guarantees that we're testing what actually + appears in the documentation. + * examples/calc++/Makefile.am ($(calc_extracted)): Use `$(VERSION)' + rather than `@VERSION@'. + +2006-12-18 Paul Eggert + + * NEWS: Reword the %language news a bit, and put it earlier. + + * src/getargs.c (skeleton_arg): Last arg is now location const *. + Rewrite to simplify the logic. + (language_argmatch): Likewise. + (program_name): We now own this var. + * src/getargs.h (struct bison_language): Use char[] rather than + const char *. + + * doc/bison.texinfo (Decl Summary, Bison Options): Don't claim + Java is supported. + * src/complain.c (program_name): Remove decl; no longer needed. + * src/main.c (program_name): Remove; now belongs to getargs. + +2006-12-18 Paolo Bonzini + + * NEWS: Document %language. + + * data/Makefile.am (dist_pkgdata_DATA): Add c-skel.m4, c++-skel.m4. + + * data/c-skel.m4, data/c++-skel.m4: New files. + * data/glr.c: Complain on push parsers. + + * doc/bison.texinfo (C++ Parser Interface): Prefer %language + over %skeleton. + (Decl Summary): Document %language and %skeleton. + (Command line): Document -L. + + * examples/extexi: Rewrite %require directive. + * examples/calc++/Makefile.am: Pass VERSION to extexi. + + * src/files.c (compute_exts_from_gc): Look in language structure + for .y extension. + (compute_file_name_parts): Check whether .tab should be added. + * src/getargs.c (valid_languages, skeleton_prio, language_prio): + (language, skeleton_arg, language_argmatch): New. + (long_options): Add --language. + (getargs): Use skeleton_arg, add -L/--language. + * src/getargs.h: Include location.h. + (struct bison_language, language, skeleton_arg, language_argmatch): New. + * src/output.c (prepare): Pick default skeleton from struct language. + Don't dispatch C skeletons here. + * src/parse-gram.y (PERCENT_LANGUAGE): New. + (prologue_declaration): Add "%language" rule, use skeleton_arg. + * src/scan-gram.l ("%language"): New rule. + + * tests/calc.at: Test %skeleton and %language. + * tests/local.at (AT_SKEL_CC_IF): Look for %language. + (AT_GLR_IF): Look for %skeleton "glr.cc". + (AT_LALR1_CC_IF, AT_GLR_CC_IF): Rewrite. + (AT_YACC_IF): Reject %language. + +2006-12-18 Paul Eggert + + * src/symtab.h (struct semantic_type): Remove the tag 'semantic_type', + since it wasn't used; only the typedef name 'semantic_type' is needed. + Also, omit trailing white space. + + * bootstrap: Sync from coreutils. + (gnulib_extra_files): Add build-aux/announce.gen. + (slurp): Adjust .gitignore files like .cvsignore files. + * build-aux/announce-gen: Remove from CVS, since bootstrap + now creates this. + +2006-12-16 Joel E. Denny + + Make %push-parser imply %pure-parser. This fixes several bugs; see + . + * src/parse-gram.y (prologue_declaration): For %push-parser, also set + pure_parser = true. + * data/push.c: Don't bother testing b4_push_if when deciding whether + to expand b4_declare_parser_variables globally. + (yypush_parse): Likewise in here. + + * data/push.c (yypush_parse): Add b4_parse_param to arguments. + (yy_reduce_print): Reformat M4 for readability. + +2006-12-15 Bob Rossi + and Joel Denny + + * data/push.c (yypstate): Add typedef, and update all uses of + struct yypstate to just yypstate. + * tests/calc.at (_AT_DATA_CALC_Y): Update here as well. + +2006-12-14 Bob Rossi + + * data/push.c (yypush_parse): Declare prototype regardless of + %locations option. + +2006-12-14 Bob Rossi + + * data/push.c (yyparse): Remove the prototype and the #define when in + push-parser mode. + +2006-12-13 Bob Rossi + + * data/push.c (yypstate_init): Rename to... + (yypstate_new): ... this and use b4_c_function_def. + (yypstate_delete): New. + (yypush_parse): Change parameters yynval and yynlloc to be const. + * tests/calc.at (_AT_DATA_CALC_Y): Use new yypstate_new and + yypstate_delete functions. + +2006-12-13 Joel E. Denny + + * configure.ac (AC_PREREQ): Require Autoconf 2.61 because of our + strange test case titles. Reported by Bob Rossi. + +2006-12-13 Paul Eggert + + * TODO: Add pointer to Sylvain Schmitz's work on static detection + of potential ambiguities in GLR grammers. + +2006-12-12 Joel E. Denny + + * tests/testsuite.at (AT_CHECK): When checking if $1 starts with + `bison ', use m4_index instead of m4_substr since chopping up a string + containing M4-special characters causes problems here. + + Fix a couple of bugs related to special characters in user-specified + file names, and make it easier for skeletons to compute output file + names with the same file name prefix as Bison-computed output file + names. + * data/glr.cc, data/push.c, data/yacc.c: In @output, use + b4_parser_file_name and b4_spec_defines_file instead of + @output_parser_name@ and @output_header_name@, which are now redundant. + * data/glr.c, data/lalr1.cc: Likewise. Also, in header #include's, use + b4_parser_file_name, b4_spec_defines_file, and the new + @basename(FILENAME@) instead of @output_parser_name@ and + @output_header_name@, which inappropriately escaped the file names as + C string literals. + * src/files.c (all_but_ext): Remove static qualifier. + (compute_output_file_names): Move `free (all_but_ext)' to... + (output_file_names_free): ... here since all_but_ext is needed later. + * src/files.h (all_but_ext): Extern. + * src/muscle_tab.h (MUSCLE_INSERT_STRING_RAW): New macro that does + exactly what MUSCLE_INSERT_STRING used to do. + (MUSCLE_INSERT_STRING): Use MUSCLE_OBSTACK_SGROW so that M4-special + characters are escaped properly. + * src/output.c (prepare): Define muscle file_name_all_but_ext as + all_but_ext. + For pkgdatadir muscle, maintain previous functionality by using + MUSCLE_INSERT_STRING_RAW instead of MUSCLE_INSERT_STRING. The problem + is that b4_pkgdatadir is used inside m4_include in the skeletons, so + digraphs would never be expanded. Hopefully no one has M4-special + characters in his Bison installation path. + * src/scan-skel.l: Don't parse @output_header_name@ and + @output_parser_name@ anymore since they're now redundant. + In @output, use decode_at_digraphs. + Parse a new @basename command that invokes last_component. + (decode_at_digraphs): New. + (BASE_QPUTS): Remove unused. + * tests/output.at (AT_CHECK_OUTPUT_FILE_NAME): New macro. + (Output file name): New tests. + +2006-12-09 Joel E. Denny + + Warn about output files that are generated by the skeletons and that + conflict with other output files. + * data/glr.c: Don't generate the header file here when glr.cc does. + * src/files.c (file_names, file_names_count): New static globals. + (compute_output_file_names): Invoke output_file_name_check for files + not generated by the skeletons and remove existing checks. + (output_file_name_check): New function that warns about conflicting + output file names. + (output_file_names_free): Free file_names. + * src/files.h (output_file_name_check): Declare. + * src/scan-skel.l: Invoke output_file_name_check for files generated by + the skeletons. + * tests/output.at (AT_CHECK_CONFLICTING_OUTPUT): New. + (Conflicting output files): New tests. + +2006-12-09 Ralf Wildenhues + + * doc/bison.texinfo: Fix a couple of typos. + +2006-12-08 Bob Rossi + + * data/push.c: (yypvarsinit, yypvars, struct yypvars, yypushparse): + Rename to... + (yypstate_init, yypstate, struct yypstate, yypush_parse): ... these and + update all uses. + (b4_yyssa, b4_yyerror_range, yypstate_init): Rename pv to yyps. + (yypush_parse): Rename yypvars argument to yyps and remove redundant + local pv. + (yypstate_init, yypush_parse): Declare in Bison-generated header file. + * tests/calc.at (_AT_DATA_CALC_Y): Use newly named functions. + +2006-12-07 Bob Rossi + and Joel Denny + + * data/push.c (yypvarsinit): Change return type from void* to struct + yypvars*. No longer cast to void* on return. + (struct yypvars): Remove yylen since it need not be remembered between + yypushparse invocations. + (yypushparse): Don't copy between yylen and pv->yylen. + +2006-12-05 Bob Rossi + + * data/push.c (yychar_set, yylval_set, yylloc_set): Delete. + (yypushparse): Add yynchar, yynlval, yynlloc parameters. + (b4_declare_parser_variables): Do not declare yynerrs for push mode. + (struct yypvars): Remove b4_declare_parser_variables. + (yypvarsinit): Remove init code for removed variables. + (global scope): Do not declare b4_declare_parser_variables if + push or pure mode. + (yypushparse): Add b4_declare_parser_variables. + Init new local variables, and remove init code for removed + yypvars variables. + (yyparse): Delete. + * tests/calc.at (_AT_DATA_CALC_Y): Call yypushparse for push mode + and yyparse for other modes. + (AT_CHECK_CALC_LALR): Added '%skeleton "push.c"' for push tests. + * tests/local.at (AT_PUSH_IF, AT_PURE_OR_PUSH_IF): Added. + (AT_YYERROR_SEES_LOC_IF): push-parser makes this false. + (AT_PURE_LEX_IF): True if pure or push parser. + +2006-12-05 Joel E. Denny + + Document Yacc prologue alternatives and default %destructor's and + %printer's as experimental. Don't mention Java yet. Discussed at + . + * NEWS (2.3a+): Say they're experimental. Remove any mention of Java. + (2.3a): Annotate this entry to say the old forms of these features were + also experimental. + * doc/bison.texinfo (Prologue Alternatives, Freeing Discarded Symbols, + Table of Symbols): Say they're experimental. Comment out any mention + of Java (we'll want this back eventually). + +2006-12-01 Joel E. Denny + + Support a file name argument to %defines. Deprecate `=' in + %file-prefix, %name-prefix, and %output. Discussed at + . + * NEWS (2.3a+): Mention. + * doc/bison.texinfo (Decl Summary, Table of Symbols): Add entry for new + form of %defines, and remove `=' from entries for %file-prefix, + %name-prefix, and %output. + * src/parse-gram.y (prologue_declaration): Implement. + * tests/calc.at (Simple LALR Calculator, Simple GLR Calculator, Simple + LALR1 C++ Calculator, Simple GLR C++ Calculator): Remove the `=' from + all but one occurrence of %name-prefix. + * tests/headers.at (export YYLTYPE): Remove the `=' from %name-prefix. + * tests/local.at (_AT_BISON_OPTION_PUSHDEFS): Likewise. + * tests/output.at (AT_CHECK_OUTPUT): Remove the `=' from all but one + occurrence of each of %file-prefix and %output. Add check for %defines + with argument. + * tests/reduce.at (Useless Terminals, Useless Nonterminals, + Useless Rules, Reduced Automaton, Underivable Rules, Empty Language): + Remove the `=' from %output. + +2006-11-21 Joel E. Denny + + Don't escape $ in test case titles since Autoconf 2.61 now does that + correctly. + * tests/actions.at (Default %printer and %destructor are not for error + or $undefined): Here. + (Default %printer and %destructor are not for $accept): Here. + * tests/input.at (Invalid $n and @n): Here. + +2006-11-20 Joel E. Denny + + Rename to <>. Discussed starting at + . + * NEWS (2.3a+): Update. + * doc/bison.texinfo (Freeing Discarded Symbols, Table of Symbols): + Update. + * src/parse-gram.y (TYPE_TAG_NONE, generic_symlist_item): Implement. + * src/scan-gram.l (INITIAL): Implement. + * src/symlist.c (symbol_list_default_tagless_new): Update comment. + * src/symlist.h (symbol_list, symbol_list_default_tagless_new): Update + comment. + * tests/actions.at (Default tagless %printer and %destructor, + Default tagged and per-type %printer and %destructor, + Default %printer and %destructor are not for error or $undefined, + Default %printer and %destructor are not for $accept, + Default %printer and %destructor for mid-rule values): Update. + * tests/input.at (Default %printer and %destructor redeclared, + Unused values with default %destructor): Update. + +2006-11-17 Joel E. Denny + + Don't let %prec take a nonterminal. + * src/reader.c (grammar_current_rule_prec_set): Make the %prec symbol a + token. + * tests/input.at (%prec takes a token): New test checking that %prec + won't take a nonterminal. + +2006-11-10 Joel E. Denny + + * tests/testsuite.at (AT_CHECK): Don't miss an exit value of 0 because + it was double-quoted. + * src/Makefile.am (YACC): Use --warnings=all,error so that Bison's own + grammar is maintained with Bison's highest standards. + * src/getargs.c: Fix some typos in Doxygen comments. + +2006-11-10 Joel E. Denny + + Fix memory leaks in scanners generated by at least Flex 2.5.9 and + later. Reported by Paul Eggert in + . + * src/flex-scanner.h (yylex_destroy): Define for Flex before 2.5.9. + * src/scan-code.l (translate_action): Don't bother invoking + yy_delete_buffer (YY_CURRENT_BUFFER) before creating the first buffer. + (code_scanner_free): Instead of invoking + yy_delete_buffer (YY_CURRENT_BUFFER) directly, invoke yylex_destroy, + which frees more. + * src/scan-gram.l (gram_scanner_free): Likewise. + * src/scan-skel.l (scan_skel): Likewise. + +2006-11-09 Joel E. Denny + + * src/files.c (tr): Change return type to void. + * src/muscle_tab.c (muscle_insert): Free storage in case muscle_grow + has been called previously for the same key. + (muscle_find): Return storage instead of value so that + --enable-gcc-warnings doesn't produce warnings that the return discards + const. aver that the value and storage are the same since storage + could potentially be NULL when value is not. + * tests/testsuite.at (AT_CHECK): Treat an unspecified exit value the + same as 0. + +2006-11-08 Paul Eggert + + * bootstrap.conf (excluded_files): Exclude m4/codeset.m4 (undoing + the earlier change today), m4/intl.m4, m4/intldir.m4. This gives + us a slightly cleaner distribution, and also works. + * m4/.cvsignore: Add inline.m4, wint_t.m4 to accommodate recent + gnulib changes. + +2006-11-08 Joel E. Denny + and Paul Eggert + + Don't let Bison leak memory except when it complains. + * src/files.h (parser_file_name, spec_verbose_file, spec_graph_file): + (spec_defines_file, dir_prefix): Now char *, not const char *, + since they are freed. + * src/files.c: Likewise. + (all_but_ext, all_but_tab_ext, src_extension, header_extension): + Likewise. + (tr): Now operates in-place. All uses changed. + (compute_exts_from_gf, compute_exts_from_src): Don't leak temporary + values. + (compute_file_name_parts, compute_output_file_names): Don't store + read-only data in variables that will be freed. + (compute_output_file_names): Free all_but_ext, all_but_tab_ext, + src_extension, and header_extension. + (output_file_names_free): New public function to free + spec_verbose_file, spec_graph_file, spec_defines_file, + parser_file_name, and dir_prefix. + * src/getargs.c (getargs): Don't store read-only data in variables that + will be freed. + * src/main.c (main): Invoke output_file_names_free, code_scanner_free + (which previously existed but was unused), and quotearg_free. + * src/muscle_tab.h (muscle_insert): value arg is now a `char const *'. + * src/muscle_tab.c: Likewise. + (muscle_entry): Make the value char const *, + and add a new storage member that is char * and can be freed. + (muscle_entry_free): New private function. + (muscle_init): Use it instead of free. + (muscle_insert, muscle_grow): Update and use new storage member. + (muscle_code_grow): Free the string passed to muscle_grow + since it's not needed anymore. + * src/parse-gram.y (%union): Make `chars' member a `char const *', and + add a new `char *code' member. + ("{...}"): Declare semantic type as code. + * src/scan-code.h (translate_rule_action): + (translate_symbol_action, translate_code, translate_action): Return + `char const *' rather than `char *' since external code should not free + these strings. + * src/scan-code.l: Likewise. + * src/scan-gram.l (): Use val->code for BRACED_CODE, + which is "{...}" in the parser. + * tests/Makefile.am (maintainer-check-valgrind): Set + VALGRIND_OPTS='--leak-check=full --show-reacheable=yes' before invoking + Valgrind. + * tests/calc.at (_AT_DATA_CALC_Y): fclose the FILE* so Valgrind doesn't + complain. + * tests/testsuite.at (AT_CHECK): Redefine so that running Bison and + expecting a non-zero exit status sets --leak-check=summary and + --show-reachable=no for Valgrind. Bison unabashedly leaks memory in + this case, and we don't want to hear about it. + +2006-11-08 Paul Eggert + + * bootstrap (runtime-po/Makevars): Derive from po/Makevars + instead of from the template, to simplify configuration a bit. + * bootstrap.conf (excluded_files): Don't exclude m4/codeset.m4 + and m4/wint_t.m4, as they are needed with the latest gnulib. + +2006-10-31 Joel E. Denny + + Disable unset/unused mid-rule value warnings by default, and recognize + --warnings=midrule-values to enable them. Discussed starting at + . + * NEWS (2.3a+): Mention. + * src/getargs.c, src/getargs.h (warnings_args, warnings_types, enum + warnings): Add entry for midrule-values subargument. + * src/reader.c (symbol_should_be_used): Don't return true just because + the value is a set/used mid-rule value unless + --warnings=midrule-values was specified. + * tests/input.at (Unused values, Unused values before symbol + declarations): Run tests with and without --warnings=midrule-values. + + * src/reader.c (check_and_convert_grammar): Use symbol_list_free rather + than LIST_FREE directly. + +2006-10-31 Joel E. Denny + + Finish implementing --warnings=error, which should not be implied by + --warnings=all (or by its synonyms -W and --warnings without + subarguments). + * src/complain.c (set_warning_issued): New function to report that + warnings are being treated as errors and to record an error if so. + Invoke... + (warn_at, warn): ... here. + * src/getargs.c (warnings_args, warnings_types): Reorder so that + "error - warnings are errors" does not appear above "all - all of the + above". + (getargs): For -W and --warnings without subarguments, don't let + FLAGS_ARGMATCH set warnings_error in warnings_flag. + * src/getargs.h (enum warnings): Unset warnings_error in warnings_all. + +2006-10-31 Joel E. Denny + + * src/getargs.c (flags_argmatch): Don't cause segmentation fault for + empty subargument list. For example: `bison --warnings= parser.y'. + +2006-10-21 Joel E. Denny + + * data/push.c, data/yacc.c: Make sure there's a newline at the end of + the parser header file so that gcc doesn't warn. + +2006-10-21 Joel E. Denny + + Split the default %destructor/%printer into two kinds: <*> and . + Discussed starting at + . + * NEWS (2.3a+): Mention. + * doc/bison.texinfo (Freeing Discarded Symbols): Document this and the + previous change today related to mid-rules. + (Table of Symbols): Remove %symbol-default and add <*> and . + * src/parse-gram.y (PERCENT_SYMBOL_DEFAULT): Remove. + (TYPE_TAG_ANY): Add as <*>. + (TYPE_TAG_NONE): Add as . + (generic_symlist_item): Remove RHS for %symbol-default and add RHS's + for <*> and . + * src/scan-gram.l (PERCENT_SYMBOL_DEFAULT): Remove. + (TYPE_TAG_ANY, TYPE_TAG_NONE): Add. + * src/symlist.c (symbol_list_default_new): Split into tagged and + tagless versions. + (symbol_list_destructor_set, symbol_list_printer_set): Split + SYMLIST_DEFAULT case into SYMLIST_DEFAULT_TAGGED and + SYMLIST_DEFAULT_TAGLESS. + * src/symlist.h: Update symbol_list_default*_new prototypes. + (symbol_list.content_type): Split enum value SYMLIST_DEFAULT into + SYMLIST_DEFAULT_TAGGED and SYMLIST_DEFAULT_TAGLESS. + * src/symtab.c (default_destructor, default_destructor_location, + default_printer, default_printer_location): Split each into tagged and + tagless versions. + (symbol_destructor_get, symbol_destructor_location_get, + symbol_printer_get, symbol_printer_location_get): Implement tagged + default and tagless default cases. + (default_destructor_set, default_printer_set): Split each into tagged + and tagless versions. + * src/symtab.h: Update prototypes. + * tests/actions.at (Default %printer and %destructor): Rename to... + (Default tagless %printer and %destructor): ... this, and extend. + (Per-type %printer and %destructor): Rename to... + (Default tagged and per-type %printer and %destructor): ... this, and + extend. + (Default %printer and %destructor for user-defined end token): Extend. + (Default %printer and %destructor are not for error or $undefined): + Update. + (Default %printer and %destructor are not for $accept): Update. + (Default %printer and %destructor for mid-rule values): Extend. + * tests/input.at (Default %printer and %destructor redeclared): Extend. + (Unused values with default %destructor): Extend. + +2006-10-21 Joel E. Denny + + Don't apply the default %destructor/%printer to an unreferenced midrule + value. Mentioned at + . + * src/symtab.c (dummy_symbol_get): Name all dummy symbols initially + like $@n instead of just @n so that the default %destructor/%printer + logic doesn't see them as user-defined symbols. + (symbol_is_dummy): Check for both forms of the name. + * src/reader.c (packgram): Remove the `$' from each midrule symbol + name for which the midrule value is referenced in any action. + * tests/actions.at (Default %printer and %destructor for mid-rule + values): New test. + * tests/regression.at (Rule Line Numbers, Web2c Report): Update output + for change to dummy symbol names. + +2006-10-20 Joel E. Denny + + Warn about unset midrule $$ if the corresponding $n is used. + * src/reader.c (symbol_should_be_used): Check midrule parent rule for + $n usage. + (packgram): Before invoking grammar_rule_check on any rule, make sure + all actions have already been scanned in order to set `used' flags. + Otherwise, checking that a midrule's $$ is set will not always work + properly because the midrule check must forward-reference the midrule's + parent rule. + * tests/input.at (AT_CHECK_UNUSED_VALUES): Extend to check the new + warning. + +2006-10-20 Joel E. Denny + + More improvements to the documentation of the prologue alternatives: + * NEWS (2.3a+): Mention the new `Prologue Alternatives' section in the + Bison manual. + * doc/bison.texinfo (Prologue Alternatives): Correct some errors. Add + some text to clarify the relative importance of the new directives and + to show how these directives may be viewed as code labels. + +2006-10-16 Joel E. Denny + + Similar to the recently removed %before-header, add %code-top as the + alternative to the pre-prologue. Mentioned at + . + Also, let the prologue alternatives appear in the grammar section. + * src/parse-gram.y (PERCENT_CODE_TOP): New token. + (prologue_declaration): Move the existing prologue alternatives to... + (grammar_declaration): ... here and add %code-top. + * src/scan-gram.l (PERCENT_CODE_TOP): New token. + + Clean up and extend documentation for the prologue alternatives. + * NEWS (2.3a+): Describe prologue alternatives. + * doc/bison.texinfo (Prologue): Move discussion of prologue + alternatives to... + (Prologue Alternatives): ... this new section, and extend it to discuss + all 4 directives in detail. + (Table of Symbols): Clean up discussion of prologue alternatives and + add %code-top. + 2006-10-16 Juan Manuel Guerrero DJGPP specific issues. @@ -452,7 +1872,7 @@ . * NEWS (2.3+): Add %symbol-default to example. * bison.texinfo (Freeing Discarded Symbols): Likewise. - (Bison Symbols): Add entry for %symbol-default. + (Table of Symbols): Add entry for %symbol-default. * src/parse-gram.y (PERCENT_SYMBOL_DEFAULT): New token. (generic_symlist, generic_symlist_item): New nonterminals for creating a list in which each item is a symbol, semantic type, or @@ -1094,7 +2514,7 @@ prologue blocks with %*-header declarations. (Calc++ Parser): Likewise. (Bison Declaration Summary): Update names. - (Bison Symbols): Update description. + (Table of Symbols): Update description. * src/parse-gram.y (PERCENT_AFTER_DEFINITIONS): Update to... (PERCENT_END_HEADER): ... this. (PERCENT_BEFORE_DEFINITIONS): Update to... @@ -1175,7 +2595,7 @@ file. (Calc++ Parser): Forward declare driver in a %before-definitions rather than in the pre-prologue so that make check succeeds. - (Bison Symbols): Add entries for %before-definitions and + (Table of Symbols): Add entries for %before-definitions and %after-definitions. * src/parse-gram.y (PERCENT_BEFORE_DEFINITIONS): New token for %before-definitions. @@ -2265,7 +3685,7 @@ 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 + actions and since it's already discussed in `Table of 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. @@ -2276,7 +3696,7 @@ `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' + (Table of Symbols): In the yychar entry, don't call it the `current' look-ahead. In the yylloc and yylval entries, mention look-ahead usage. @@ -17508,8 +18928,8 @@ ----- Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996, - 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 Free - Software Foundation, Inc. + 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 + Free Software Foundation, Inc. Copying and distribution of this file, with or without modification, are permitted provided the copyright notice and this