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destructors, printers, and actions into a code_props structure and interface. * 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/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/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/reader.c: Update to use code_props interface for destructors and rule actions. * 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, code_props_code_get, code_props_location_get, code_props_is_value_used): The rest of the new code_props interface. (translate_rule_action, translate_symbol_action, translate_code): Remove as these are now just special cases within code_props_translate_code, which is switched on the code_props kind. (code_scanner_last_string_free): New function similar to gram_scanner_last_string_free. * src/scan-code.l: Implement the new interface. (last_string): New static global similar to the one in scan-gram.l. (SC_SYMBOL_ACTION): For $$, set the is_value_used member of the code_props since Bison will one day use this information for destructors and printers. (<*><<EOF>>): Use STRING_FINISH so that last_string is set. (handle_action_dollar): Update to use the code_props interface of rule actions. Use symbol_list_n_get and set is_value_used directly since symbol_list_n_used_set is removed. * src/symlist.h, src/symlist.c (symbol_list): Replace action, action_location, and used members with a code_props member, and update all uses. (symbol_list_n_used_set): Remove since it would need to break the encapsulation of code_props. (symbol_list_destructor_set, symbol_list_printer_set): Perform code translation here rather than depending on the caller to do so. * 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_location_get, symbol_printer_location_get): Remove unneeded. (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 const char * and location. * src/symtab.c: Update implementation for interface and struct changes. (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_CODE_PRINT): New similar to SYMBOL_ATTR_PRINT but for code_props members. (symbol_print): Use SYMBOL_CODE_PRINT. * src/scan-gram.h (gram_last_string): Remove declaration. * src/scan-gram.l (last_string): Declare it static.
This directory contains the Bison parser generator. See the file INSTALL for generic compilation and installation instructions. See the file doc/FAQ for frequently asked questions. Bison requires GNU m4 1.4.3 or later. See: ftp://ftp.gnu.org/gnu/m4/m4-1.4.3.tar.gz Bison can work with pre-1.4.3 distributions of GNU m4 if they are sufficiently patched, but if you encounter a bug with an older distribution and report a bug we will probably suggest that you upgrade to 1.4.3 as the first step in trying to fix it. Please 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 and the documentation does not answer them, please send mail to <help-bison@gnu.org>. ----- Copyright (C) 1992, 1998, 1999, 2003, 2004, 2005 Free Software Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. Bison is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. Bison is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with autoconf; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.