+2006-09-04 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Require default %destructor/%printer to be declared using
+ %symbol-default instead of an empty symbol list, and start working on
+ new per-type %destructor/%printer. Discussed at
+ <http://lists.gnu.org/archive/html/bison-patches/2006-09/msg00007.html>.
+ * NEWS (2.3+): Add %symbol-default to example.
+ * bison.texinfo (Freeing Discarded Symbols): Likewise.
+ (Bison 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
+ %symbol-default.
+ (grammar_declaration): Use generic_symlist in %destructor and %printer
+ declarations instead of symbols.1 or an empty list.
+ (symbol_declaration, precedence_declaration, symbols.1): Update actions
+ for changes to symbol_list.
+ * src/reader.c: Update for changes to symbol_list.
+ * src/scan-code.l: Likewise.
+ * src/scan-gram.l: Scan new PERCENT_SYMBOL_DEFAULT token.
+ * src/symlist.c, src/symlist.h: Extend such that a list node may
+ represent a semantic type or a %symbol-default in addition to just an
+ ordinary symbol. Add switched functions for setting %destructor's and
+ %printer's.
+ * tests/actions.at, tests/input.at: Add %symbol-default to all default
+ %destructor/%printer declarations.
+
+2006-08-23 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Whether the default %destructor/%printer applies to a particular symbol
+ isn't a question of whether the user *declares* that symbol (in %token,
+ for example). It's a question of whether the user by any means
+ *defines* the symbol at all (by simply using a char token, for
+ example). $end is defined by Bison whereas any other token with token
+ number 0 is defined by the user. The error token is always defined by
+ Bison regardless of whether the user declares it with %token, but we
+ may one day let the user define error as a nonterminal instead.
+ * NEWS (2.3+): Say "user-defined" instead of "user-declared".
+ * doc/bison.texinfo (Freeing Discarded Symbols): Likewise, and document
+ the meaning of "user-defined".
+ * tests/actions.at (Default %printer and %destructor for user-declared
+ end token): Rename to...
+ (Default %printer and %destructor for user-defined end token): ...
+ this.
+
+ * src/symtab.c (symbol_destructor_get, symbol_printer_get): In the
+ computation of whether to apply the default, don't maintain a list of
+ every Bison-defined symbol. Instead, just check for a first character
+ of '$', which a user symbol cannot have, and check for the error token.
+
+2006-08-21 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Don't apply the default %destructor or %printer to the error token,
+ $undefined, or $accept. This change fits the general rule that the
+ default %destructor and %printer are only for user-declared symbols,
+ and it solves several difficulties that are described in the new test
+ cases listed below.
+ * src/symtab.c (symbol_destructor_get, symbol_printer_get): Implement.
+ * tests/actions.at (Default %printer and %destructor are not for error
+ or $undefined, Default %printer and %destructor are not for $accept):
+ New test cases.
+
+2006-08-19 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Allow %start after the first rule.
+ * src/reader.c (grammar_current_rule_begin): Don't set the start symbol
+ when parsing the first rule.
+ (check_and_convert_grammar): Search for it here after all grammar
+ declarations have been parsed. Skip midrules, which have dummy LHS
+ nonterminals.
+ * src/symtab.c (symbol_is_dummy): New function.
+ * src/symtab.h (symbol_is_dummy): Declare it.
+ * tests/input.at (%start after first rule): New test.
+
+2006-08-18 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Redo some of the previous commit: add back the ability to use
+ non-aliased/undeclared string literals since it might be useful to
+ those declaring %token-table.
+ * src/reader.c (check_and_convert_grammar): Undo changes in previous
+ commit: don't worry about complaints from symbols_pack.
+ * src/symtab.c (symbol_new, symbol_class_set,
+ symbol_check_alias_consistency): Undo changes in previous commit: count
+ each string literal as a new symbol and token, assign it a symbol
+ number, and don't complain about non-aliased string literals.
+ (symbols_pack): Since symbol_make_alias still does not decrement symbol
+ and token counts but does still set aliased tokens to the same number,
+ symbol_pack_processor now leaves empty slots in the symbols array.
+ Remove those slots.
+ * tests/regression.at (Undeclared string literal): Remove test case
+ added in previous commit since non-aliased string literals are allowed
+ again.
+ (Characters Escapes, Web2c Actions): Undo changes in previous commit:
+ remove unnecessary string literal declarations.
+ * tests/sets.at (Firsts): Likewise.
+
+2006-08-18 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Don't allow an undeclared string literal, but allow a string literal to
+ be used before its declaration.
+ * src/reader.c (check_and_convert_grammar): Don't invoke packgram if
+ symbols_pack complained.
+ * src/symtab.c (symbol_new): Don't count a string literal as a new
+ symbol.
+ (symbol_class_set): Don't count a string literal as a new token, and
+ don't assign it a symbol number since symbol_make_alias does that.
+ (symbol_make_alias): It's not necessary to decrement the symbol and
+ token counts anymore. Don't assume that an alias declaration occurs
+ before any uses of the identifier or string, and thus don't assert that
+ one of them has the highest symbol number so far.
+ (symbol_check_alias_consistency): Complain if there's a string literal
+ that wasn't declared as an alias.
+ (symbols_pack): Bail if symbol_check_alias_consistency failed since
+ symbol_pack asserts that every token has been assigned a symbol number
+ although undeclared string literals have not.
+ * tests/regression.at (String alias declared after use, Undeclared
+ string literal): New test cases.
+ (Characters Escapes, Web2c Actions): Declare string literals as
+ aliases.
+ * tests/sets.at (Firsts): Likewise.
+
+2006-08-14 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ In the grammar scanner, STRING_FINISH unclosed constructs and return
+ them to the parser in order to improve error messages.
+ * src/scan-gram.l (SC_ESCAPED_STRING, SC_ESCAPED_CHARACTER,
+ SC_BRACED_CODE, SC_PROLOGUE): Implement.
+ * tests/input.at (Unclosed constructs): New test case.
+ * tests/regression.at (Invalid inputs): Update now that unclosed %{ is
+ seen.
+
+ * src/scan-gram.h, src/scan-gram.l (gram_last_braced_code_loc): Remove
+ unused global.
+
+2006-08-13 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Handle string aliases for character tokens correctly.
+ * src/symtab.c (symbol_user_token_number_set): If the token has an
+ alias, check and set its alias's user token number instead of its own,
+ which is set to indicate the alias. Previously, every occurrence of
+ the character token in the grammar overwrote that alias indicator with
+ the character code.
+ * tests/input.at (String aliases for character tokens): New test.
+
+2006-08-12 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ * src/parse-gram.y: Add `%expect 0' so we don't overlook conflicts.
+
+2006-08-11 Paul Eggert <eggert@cs.ucla.edu>
+
+ * bootstrap: Put in need-ngettext argument to AM_GNU_GETTEXT,
+ to prevent failures when building on older platforms.
+ Check for autopoint failure.
+ Set XGETTEXT_OPTIONS to values that check for C format strings,
+ so that translators are warned about them (this also helps
+ prevent core dumps).
+
+ * lib/subpipe.c (create_subpipe): Use new gnulib pipe_safer
+ function, since it simplifies our code a bit.
+
+ * configure.ac (AC_ARG_ENABLE): Use -Wextra -Wno-sign-compare
+ rather than -W, so we don't get bogus warnings about sign comparisons.
+ Add -Wpointer-arith, since that warning is useful (it reports code
+ that does not conform to C89 and that some compilers reject).
+ * data/c.m4, data/glr.c, data/lalr1.cc, data/yacc.c: Undo latest change,
+ since it's no longer needed.
+
+2006-08-10 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Clean up scanners a bit.
+ * src/flex-scanner.h (FLEX_NO_OBSTACK): New macro that blocks obstack
+ definitions so gcc won't warn when obstack_for_string is unused.
+ * src/scan-code.l: config.h and system.h are already #include'd by
+ scan-code-c.c, so get rid of them here.
+ * src/scan-gram.l: Likewise.
+ * src/scan-skel.l: Likewise, and use flex-scanner.h without obstack
+ definitions rather than duplicating the rest of it.
+ * src/scan-gram-c.c, scan-skel-c.c: #include "system.h".
+
+2006-08-09 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Suppress signed/unsigned comparison warnings for yycheck.
+ * data/c.m4 (b4_safest_int_type): New macro.
+ * data/glr.c, data/lalr1.cc: Wherever you compare yycheck[i] against
+ a signed int type, cast it to b4_safest_int_type first.
+ * data/yacc.c: Likewise.
+ (b4_safest_int_type): Overwrite the one from c.m4 since b4_int_type is
+ also overwritten.
+
+2006-08-09 Ralf Wildenhues <Ralf.Wildenhues@gmx.de> (tiny change)
+
+ * doc/bison.texinfo: Fix some typos.
+
+2006-08-02 Paul Eggert <eggert@cs.ucla.edu>
+
+ * m4/.cvsignore: Add inttypes_h.m4,lib-ld.m4, lib-prefix.m4,
+ po.m4, stdint_h.m4, uintmax_t.m4, ulonglong.m4, warning.m4.
+
+ * bootstrap (gnulib_tool): Stop using --assume-autoconf;
+ the latest gnulib does this a different way.
+ (get_translations): Sharuzzaman Ahmat Raslan reported that the ms
+ translation was patched, so stop omitting it.
+
+2006-07-29 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Enable declaration of default %printer/%destructor. Make the parser
+ use these for all user-declared grammar symbols for which the user does
+ not declare a specific %printer/%destructor. Thus, the parser uses it
+ for token 0 if the user declares it but not if Bison generates it as
+ $end. Discussed starting at
+ <http://lists.gnu.org/archive/html/bison-patches/2006-02/msg00064.html>,
+ <http://lists.gnu.org/archive/html/bison-patches/2006-06/msg00091.html>,
+ and
+ <http://lists.gnu.org/archive/html/bison-patches/2006-07/msg00019.html>.
+ * NEWS (2.3+): Mention.
+ * doc/bison.texinfo (Actions in Mid-Rule): It's no longer impossible to
+ declare a %destructor for a mid-rule's semantic value. It's just
+ impossible to declare one specific to it.
+ (Freeing Discarded Symbols): Mention that @$ can be used in %destructor
+ code. Describe default %destructor form.
+ * src/parse-gram.y (grammar_declaration): Parse default
+ %printer/%destructor declarations.
+ * src/output.c (symbol_destructors_output): Use symbol_destructor_get
+ and symbol_destructor_location_get rather than accessing the destructor
+ and destructor_location members of struct symbol.
+ (symbol_printers_output): Likewise but for %printer's.
+ * src/reader.c (symbol_should_be_used): Likewise but for %destructor's
+ again.
+ * src/symtab.c (default_destructor, default_destructor_location,
+ default_printer, default_printer_location): New static global
+ variables to record the default %destructor and %printer.
+ (symbol_destructor_get, symbol_destructor_location_get,
+ symbol_printer_get, symbol_printer_location_get): New functions to
+ compute the appropriate %destructor and %printer for a symbol.
+ (default_destructor_set, default_printer_set): New functions to set the
+ default %destructor and %printer.
+ * src/symtab.h: Prototype all those new functions.
+ * tests/actions.at (Default %printer and %destructor): New test to
+ check that the right %printer and %destructor are called, that they're
+ not called for $end, and that $$ and @$ work correctly.
+ (Default %printer and %destructor for user-declared end token): New
+ test to check that the default %printer and %destructor are called for
+ a user-declared end token.
+ * tests/input.at (Default %printer and %destructor redeclared, Unused
+ values with default %destructor): New tests to check related grammar
+ warnings and errors.
+
+2006-07-29 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ Clean up handling of %destructor for the end token (token 0).
+ Discussed starting at
+ <http://lists.gnu.org/archive/html/bison-patches/2006-07/msg00019.html>
+ and
+ <http://lists.gnu.org/archive/html/help-bison/2006-07/msg00013.html>.
+
+ Make the skeletons consistent in how they pop the end token and invoke
+ its %destructor.
+ * data/glr.c (yyrecoverSyntaxError, yyparse): Don't pop the start
+ state, which has token number 0, since this would invoke the
+ %destructor for the end token.
+ * data/lalr1.cc (yy::parser::parse): Don't check for the final state
+ until after shifting the end token, or else it won't be popped.
+ * data/yacc.c (yyparse): Likewise.
+
+ * data/glr.c (yyparse): Clear the lookahead after shifting it even when
+ it's the end token. Upon termination, destroy an unshifted lookahead
+ even when it's the end token.
+ * data/lalr1.cc (yy::parser::parse): Likewise.
+ * data/yacc.c (yyparse): Likewise.
+
+ * src/reader.c (packgram): Don't check rule 0. This suppresses unused
+ value warnings for the end token when the user gives the end token a
+ %destructor.
+
+ * tests/actions.at (Printers and Destructors): Test all the above.
+
+2006-07-24 Paul Eggert <eggert@cs.ucla.edu>
+
+ Update to latest gnulib and gettext versions.
+ * bootstrap (gnulib-modules): Remove hard-locale, stdio-safer.
+ Add fopen-safer.
+ (gnulib_files): Add m4/warning.m4. Don't worry about files
+ overwritten by autopoint.
+ Replace gt_INTL_SUBDIR_CORE with an empty body in m4/gettext_gl.m4.
+ Suppress "id", "ms", "tr" translations for now, since gettext 0.15
+ rejects them.
+ Don't use autoreconf; instead, invoke autopoint etc. by hand,
+ so that we can remove the intl files at a better time.
+ (intl_files_to_remove): Remove aclocal.m4, since it gets
+ rebuilt anyway. Remove m4/inttypes_h.m4, m4/inttypes.m4,
+ m4/isc-posix.m4, m4/lib-ld.m4, m4/lib-prefix.m4, m4/po.m4,
+ m4/stdint_h.m4, m4/uintmax_t.m4, m4/ulonglong.m4.
+ Add m4/inttypes-h.m4, m4/lock.m4, m4/visibility.m4.
+ Remove datarootdir hack; no longer needed.
+ * configure.ac: Use gl_WARNING_CFLAGS rather than BISON_WARNING.
+ (AM_GNU_GETTEXT_VERSION): Bump from 0.12 to 0.15.
+ * lib/.cvsignore: Remove hard-locale.c, hard-locale.h, strdup.c,
+ strdup.h.
+ * m4/.cvsignore: Remove hard-locale.m4, strdup.m4.
+ * m4/warning.m4: Remove from CVS, since we now use gnulib's version.
+
+2006-07-20 Paul Eggert <eggert@cs.ucla.edu>
+
+ * bootstrap: Adjust to today's change to gnulib-tool by invoking
+ it with --assume-autoconf='latest-stable'.
+
+2006-07-13 Joel E. Denny <jdenny@ces.clemson.edu>
+
+ * src/parse-gram.y (grammar_declaration): Don't confuse Doxygen (at
+ least 1.4.7 and 1.4.4) by putting a #line between `typedef union
+ YYSTYPE' and `{'.
+ * src/muscle_tab.h (muscle_grow): Replace the header comments with
+ those from muscle_tab.c since the old ones are misleading.
+
+2006-07-13 Akim Demaille <akim@epita.fr>
+
+ Support %define "KEY" {VALUE}.
+ * src/scan-code.h, src/scan-code.l (translate_action)
+ (translate_rule_action, translate_symbol_action, translate_code):
+ Return char *, not const char *.
+ * src/parse-gram.y (declaration): Rename as...
+ (prologue_declaration): this.
+ (string_content): Remove this nonterminal, use STRING.
+ (braceless, content, content.opt): New nonterminal.
+ Use them.
+ (%define): Now accept content.opt, i.e., accept also BRACED_CODE
+ as value.
+ * src/scan-gram.l (getargs.h): Don't include it.
+
+2006-07-12 Paul Eggert <eggert@cs.ucla.edu>
+
+ * data/lalr1.cc (YYCDEBUG): Use 'if (yydebug_) (*yycdebug_)'
+ rather than a for-loop that declares a local bool variable. This
+ should work around a compatibility problem with a Cray x1e C++
+ compiler reported by Hung Nguyen in
+ <http://lists.gnu.org/archive/html/help-bison/2006-07/msg00022.html>.
+ The for-loop was introduced in the 2004-11-17 change but I don't
+ know why it was needed.
+
+2006-07-12 Akim Demaille <akim@epita.fr>
+
+ * data/c.m4: Comment changes.
+
+2006-07-10 Akim Demaille <akim@lrde.epita.fr>
+
+ * src/complain.c (error_message, ERROR_MESSAGE): New.
+ To factor...
+ (fatal_at, fatal, warn_at, warn, complain_at, complain): these.
+ * src/complain.h, src/complain.c (warning_issued): Remove, unused.
+
+2006-07-09 Paul Eggert <eggert@cs.ucla.edu>
+
+ * NEWS: Instead of %union, you can define and use your own union type
+ YYSTYPE if your grammar contains at least one <type> tag.
+ Your YYSTYPE need not be a macro; it can be a typedef.
+ * doc/bison.texinfo (Value Type, Multiple Types, Location Type):
+ (Union Decl, Decl Summary): Document this.
+ * data/glr.c (YYSTYPE): Implement this.
+ * data/glr.cc (YYSTYPE): Likewise.
+ * data/lalr1.cc (YYSTYPE): Likewise.
+ * data/yacc.c (YYSTYPE): Likewise.
+ * src/output.c (prepare): Output tag_seen_flag.
+ * src/parse-gram.y (declaration, grammar_declaration):
+ Use 'union_seen' rather than 'typed' to determine whether
+ %union has been seen, since grammars can now be typed without
+ %union.
+ (symbol_declaration, type.opt, symbol_def):
+ Keep track of whether a tag has been seen.
+ * src/reader.c (union_seen, tag_seen): New vars.
+ (typed): remove.
+ * src/reader.h (union_seen, tag_seen, typed): Likewise.
+ * src/scan-code.l (untyped_var_seen): New variable.
+ (handle_action_dollar): Adjust to above changes.
+ (handle_action_dollar, handle_action_at):
+ Improve overflow checking for outlandish numbers.
+ * tests/input.at (AT_CHECK_UNUSED_VALUES): Redo test to
+ avoid new diagnostics generated by above changes.
+ * tests/regression.at (YYSTYPE typedef): Add test to check
+ for type tags without %union.
+
+ * src/symlist.c (symbol_list_length): Return int, not unsigned
+ int, since callers expect int. This may need to get revisited
+ once we have proper integer overflow checking.
+
+ * src/scan-gram.h (gram_scanner_cursor): Remove decl, since this
+ object is now static.
+
+ * src/getargs.c (flags_argmatch): Return void, not int,
+ to pacify ./configure --enable-gcc-warnings.
+
+ * src/flex-scanner.h (STRING_FREE): Don't use FLEX_PREFIX (last_string)
+ since last_string is already defined to FLEX_PREFIX (last_string).
+
+2006-07-09 Akim Demaille <akim@lrde.epita.fr>
+
+ Implement --warnings/-W.
+ * src/getargs.c (report_argmatch, trace_argmatch): Remove,
+ replaced by...
+ (flags_argmatch, FLAGS_ARGMATCH): this new function and macro.
+ Adjust callers.
+ * src/getargs.h, src/getargs.c (warnings, warnings_flags)
+ (warnings_args, warnings_types): New.
+ (getargs, short_options, long_options): Accept -W/--warnings.
+ Sort the options by alphabetical order, upper case letter right
+ before its lower case.
+
2006-07-09 Joel E. Denny <jdenny@ces.clemson.edu>
Change %merge result type clash warnings to errors. Discussed at
* data/lalr1.cc (symprint_): Use cdebug_ to avoid warnings.
-2004-1
0-28 Akim Demaille <akim@epita.fr>,
+2004-1
1-17 Akim Demaille <akim@epita.fr>,
Alexandre Duret-Lutz <adl@gnu.org>
* data/lalr1.cc (Parser::yycdebug_): New, a pointer, to allow
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