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affac6132a
* src/symlist.h, src/symlist.c (symbol_list, symbol_list_new): Add
a `used' member.
(symbol_list_n_get, symbol_list_n_used_set): New.
(symbol_list_n_type_name_get): Use symbol_list_n_get.
* src/scan-gram.l (handle_action_dollar): Flag used symbols.
* src/reader.c (grammar_current_rule_check): Check that values are
used.
* src/symtab.c (symbol_print): Accept 0.
* tests/existing.at: Remove the type information.
Empty the actions.
Remove useless actions (beware of mid-rule actions: perl -000
-pi -e 's/s*{}(?=[ns]*[|;])//g').
* tests/actions.at (Exotic Dollars): Use unused values.
* tests/calc.at: Likewise.
* tests/glr-regression.at (No users destructors if stack 0 deleted):
Likewise.
* src/gram.c (rule_useful_p, rule_never_reduced_p): Use
rule_useful_p.
87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
/* Input parser for Bison
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Copyright (C) 2000, 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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Bison is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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Bison is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bison; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#ifndef READER_H_
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# define READER_H_
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# include "location.h"
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# include "symlist.h"
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# include "parse-gram.h"
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typedef struct merger_list
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{
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struct merger_list* next;
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uniqstr name;
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uniqstr type;
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} merger_list;
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/* From the scanner. */
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extern FILE *gram_in;
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extern int gram__flex_debug;
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extern boundary scanner_cursor;
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extern int max_left_semantic_context;
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void scanner_initialize (void);
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void scanner_free (void);
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void scanner_last_string_free (void);
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/* These are declared by the scanner, but not used. We put them here
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to pacify "make syntax-check". */
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extern FILE *gram_out;
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extern int gram_lineno;
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# define YY_DECL int gram_lex (YYSTYPE *val, location *loc)
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YY_DECL;
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/* From the parser. */
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extern int gram_debug;
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int gram_parse (void);
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char const *token_name (int);
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/* From reader.c. */
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void grammar_start_symbol_set (symbol *sym, location loc);
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void prologue_augment (const char *prologue, location loc);
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void grammar_symbol_append (symbol *sym, location loc);
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void grammar_rule_begin (symbol *lhs, location loc);
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void grammar_rule_end (location loc);
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void grammar_midrule_action (void);
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void grammar_current_rule_prec_set (symbol *precsym, location loc);
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void grammar_current_rule_dprec_set (int dprec, location loc);
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void grammar_current_rule_merge_set (uniqstr name, location loc);
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void grammar_current_rule_symbol_append (symbol *sym, location loc);
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void grammar_current_rule_action_append (const char *action, location loc);
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extern symbol_list *current_rule;
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void reader (void);
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void free_merger_functions (void);
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extern merger_list *merge_functions;
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/* Was %union seen? */
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extern bool typed;
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/* Should rules have a default precedence? */
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extern bool default_prec;
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#endif /* !READER_H_ */
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