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25005f6ab0
(yyrecoverSyntaxError): Correct yyerrState logic. Correct comment. Allow states with only a default reduction. Fixes to avoid problem that $-N rules in GLR parsers can cause buffer overruns, corrupting state. * src/output.c (prepare_rules): Output max_left_semantic_context. * src/reader.h (max_left_semantic_context): New * src/scan-gram.l (max_left_semantic_context): Define. (handle_action_dollar): Update max_left_semantic_context. * data/glr.c (YYMAXLEFT): New. (yydoAction): Increase yyrhsVals size. (yyresolveAction): Ditto. Fixes to problems with location handling in GLR parsers reported by Frank Heckenbach (2003/06/05). * data/glr.c (YYLTYPE): Make trivial if locations not used. (YYRHSLOC): Add parentheses, make depend on whether locations used. (YYLLOC_DEFAULT): Ditto. (yyuserAction): Use YYLLOC_DEFAULT. (yydoAction): Remove redundant code. * tests/cxx-type.at: Exercise location information. (yylex): Track locations. (stmtMerge): Return value rather than printing.
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/* Input parser for Bison
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Copyright (C) 2000, 2001, 2002, 2003 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., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, 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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# 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 epilogue_augment (const char *epilogue, 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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extern bool typed;
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#endif /* !READER_H_ */
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