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* src/reader.c, src/reader.h (prologue_augment): New. * src/reader.c (copy_definition): Remove. * src/reader.h, src/reader.c (gram_start_symbol_set, prologue_augment) (grammar_symbol_append, grammar_rule_begin, grammar_midrule_action) (grammar_current_rule_prec_set, grammar_current_rule_check) (grammar_current_rule_symbol_append) (grammar_current_rule_action_append): Export. * src/parse-gram.y (symbol_list_new, symbol_list_symbol_append_ (symbol_list_action_append): Remove. Hook the routines from reader. * src/scan-gram.l: In INITIAL, characters and strings are tokens. * src/system.h (ATTRIBUTE_NORETURN, ATTRIBUTE_UNUSED): Now. * src/reader.c (read_declarations): Remove, unused. * src/parse-gram.y: Handle the epilogue. * src/reader.h, src/reader.c (gram_start_symbol_set): Rename as... (grammar_start_symbol_set): this. * src/scan-gram.l: Be sure to ``use'' yycontrol to keep GCC quiet. * src/reader.c (readgram): Remove, unused. (reader): Adjust to insert eoftoken and axiom where appropriate. * src/reader.c (copy_dollar): Replace with... * src/scan-gram.h (handle_dollar): this. * src/parse-gram.y: Remove `%thong'. * src/reader.c (copy_at): Replace with... * src/scan-gram.h (handle_at): this. * src/complain.h, src/complain.c (warn_at, complain_at, fatal_at): New. * src/scan-gram.l (YY_LINES): Keep lineno synchronized for the time being. * src/reader.h, src/reader.c (grammar_rule_end): New. * src/parse.y (current_type, current_class): New. Implement `%nterm', `%token' support. Merge `%term' into `%token'. (string_as_id): New. * src/symtab.h, src/symtab.c (symbol_make_alias): Don't pass the type name. * src/parse-gram.y: Be sure to handle properly the beginning of rules. * src/parse-gram.y: Handle %type. * src/reader.c (grammar_rule_end): Call grammar_current_rule_check. * src/parse-gram.y: More directives support. * src/options.c: No longer handle source directives. * src/parse-gram.y: Fix %output. * src/parse-gram.y: Handle %union. Use the prologue locations. * src/reader.c (parse_union_decl): Remove. * src/reader.h, src/reader.c (epilogue_set): New. * src/parse-gram.y: Use it. * data/bison.simple, data/bison.c++: b4_stype is now either not defined, then default to int, or to the contents of %union, without `union' itself. Adjust. * src/muscle_tab.c (muscle_init): Don't predefine `stype'. * src/output.c (actions_output): Don't output braces, as they are already handled by the scanner. * src/scan-gram.l (SC_CHARACTER): Set the user_token_number of characters to themselves. * tests/reduce.at (Reduced Automaton): End the grammars with %% so that the epilogue has a proper #line. * src/parse-gram.y: Handle precedence/associativity. * src/symtab.c (symbol_precedence_set): Requires the symbol to be a terminal. * src/scan-gram.l (SC_BRACED_CODE): Catch strings and characters. * tests/calc.at: Do not use `%token "foo"' as it makes not sense at all to define terminals that cannot be emitted. * src/scan-gram.l: Escape M4 characters. * src/scan-gram.l: Working properly with escapes in user strings/characters. * tests/torture.at (AT_DATA_TRIANGULAR_GRAMMAR) (AT_DATA_HORIZONTAL_GRAMMAR): Respect the `%token ID NUM STRING' grammar. Use more modest sizes, as for the time being the parser does not release memory, and therefore the process swallows a huge amount of memory. * tests/torture.at (AT_DATA_LOOKAHEADS_GRAMMAR): Adjust to the stricter %token grammar. * src/symtab.h (associativity): Add `undef_assoc'. (symbol_precedence_set): Do nothing when passed an undef_assoc. * src/symtab.c (symbol_check_alias_consistence): Adjust. * tests/regression.at (Invalid %directive): Remove, as it is now meaningless. (Invalid inputs): Adjust to the new error messages. (Token definitions): The new grammar doesn't allow too many eccentricities. * src/lex.h, src/lex.c: Remove. * src/reader.c (lastprec, skip_to_char, read_signed_integer) (copy_character, copy_string2, copy_string, copy_identifier) (copy_comment, parse_token_decl, parse_type_decl, parse_assoc_decl) (parse_muscle_decl, parse_dquoted_param, parse_skel_decl) (parse_action): Remove. * po/POTFILES.in: Adjust.
This directory contains the Bison parser generator. See the file INSTALL for compilation and installation instructions. See the file doc/FAQ for frequently asked questions. It was once true that, when installing Bison on Sequent (or Pyramid?) systems, you had to be in the Berkeley universe. This may no longer be true; we have no way to tell. On VMS, you will probably have to create Makefile from Makefile.in by hand. Remember to do `SET COMMAND BISON' to install the data in `BISON.CLD'. VMS and MS-DOS builds are probably broken right now. If you are able to build Bison on either platform and you need to make changes to do so, please submit those changes as a bug report. Send bug reports to bug-bison@gnu.org. Please include the version number from `bison --version', and a complete, self-contained test case in each bug report. If you have questions about using Bison which the documentation does not answer, send mail to help-bison@gnu.org.