-/* Data definitions for internal representation of bison's input,
- Copyright (C) 1984, 1986, 1989, 1992, 2001, 2002
+/* Data definitions for internal representation of Bison's input.
+
+ Copyright (C) 1984, 1986, 1989, 1992, 2001, 2002, 2003, 2004, 2005, 2006
Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
You should have received a copy of the GNU General Public License
along with Bison; see the file COPYING. If not, write to
- the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#ifndef GRAM_H_
# define GRAM_H_
The rules themselves are described by several arrays: amongst which
RITEM, and RULES.
- RULES is an array of struct rule_s, which members are:
+ RULES is an array of rules, whose members are:
RULES[R].lhs -- the symbol of the left hand side of rule R.
RULES[R].line -- the line where R was defined.
- RULES[R].useful -- TRUE iff the rule is used (i.e., FALSE if thrown
+ RULES[R].useful -- true iff the rule is used (i.e., false if thrown
away by reduce).
The right hand side is stored as symbol numbers in a portion of
# include "location.h"
# include "symtab.h"
-# define ISTOKEN(s) ((s) < ntokens)
-# define ISVAR(s) ((s) >= ntokens)
+# define ISTOKEN(i) ((i) < ntokens)
+# define ISVAR(i) ((i) >= ntokens)
extern int nsyms;
extern int ntokens;
extern int nvars;
-typedef int item_number_t;
-# define ITEM_NUMBER_MAX ((item_number_t) INT_MAX)
-# define ITEM_NUMBER_MIN ((item_number_t) INT_MIN)
-extern item_number_t *ritem;
+typedef int item_number;
+#define ITEM_NUMBER_MAX INT_MAX
+extern item_number *ritem;
extern unsigned int nritems;
-/* There is weird relationship between OT1H item_number_t and OTOH
- symbol_number_t and rule_number_t: we store the latter in
- item_number_t. symbol_number_t are stored as are, while
- the negation of (rule_number_t + 1) are stored.
+/* There is weird relationship between OT1H item_number and OTOH
+ symbol_number and rule_number: we store the latter in
+ item_number. symbol_number values are stored as-is, while
+ the negation of (rule_number + 1) is stored.
- Therefore, an symbol_number_t must be a valid item_number_t, and we
+ Therefore, a symbol_number must be a valid item_number, and we
sometimes have to perform the converse transformation. */
-# define symbol_number_as_item_number(Tok) ((item_number_t) (Tok))
-# define item_number_as_symbol_number(Ite) ((symbol_number_t) (Ite))
-extern symbol_number_t start_symbol;
+static inline item_number
+symbol_number_as_item_number (symbol_number sym)
+{
+ return sym;
+}
+
+static inline symbol_number
+item_number_as_symbol_number (item_number i)
+{
+ return i;
+}
+
+static inline bool
+item_number_is_symbol_number (item_number i)
+{
+ return i >= 0;
+}
-/* Rules numbers. */
-typedef short rule_number_t;
-# define RULE_NUMBER_MAX ((rule_number_t) SHRT_MAX)
-extern rule_number_t nrules;
-# define int_of_rule_number(RNum) ((int) (RNum))
-# define rule_number_as_item_number(RNum) ((item_number_t) (- RNum - 1))
-# define item_number_as_rule_number(INum) ((rule_number_t) (- INum - 1))
+/* Rule numbers. */
+typedef int rule_number;
+#define RULE_NUMBER_MAX INT_MAX
+extern rule_number nrules;
+static inline item_number
+rule_number_as_item_number (rule_number r)
+{
+ return -1 - r;
+}
+
+static inline rule_number
+item_number_as_rule_number (item_number i)
+{
+ return -1 - i;
+}
+
+static inline bool
+item_number_is_rule_number (item_number i)
+{
+ return i < 0;
+}
/*--------.
| Rules. |
`--------*/
-typedef struct rule_s
+typedef struct
{
/* The number of the rule in the source. It is usually the index in
RULES too, except if there are useless rules. */
- rule_number_t user_number;
+ rule_number user_number;
/* The index in RULES. Usually the rule number in the source,
except if some rules are useless. */
- rule_number_t number;
+ rule_number number;
- symbol_t *lhs;
- item_number_t *rhs;
+ symbol *lhs;
+ item_number *rhs;
/* This symbol provides both the associativity, and the precedence. */
- symbol_t *prec;
+ symbol *prec;
- short dprec;
- short merger;
+ int dprec;
+ int merger;
/* This symbol was attached to the rule via %prec. */
- symbol_t *precsym;
+ symbol *precsym;
- location_t location;
+ location location;
bool useful;
const char *action;
- location_t action_location;
-} rule_t;
+ location action_location;
+} rule;
-extern struct rule_s *rules;
+extern rule *rules;
/* A function that selects a rule. */
-typedef bool (*rule_filter_t) (rule_t *r);
+typedef bool (*rule_filter) (rule *);
/* Return true IFF the rule has a `number' smaller than NRULES. */
-bool rule_useful_p (rule_t *r);
+bool rule_useful_p (rule *r);
/* Return true IFF the rule has a `number' higher than NRULES. */
-bool rule_useless_p (rule_t *r);
+bool rule_useless_p (rule *r);
/* Return true IFF the rule is not flagged as useful *and* is useful.
In other words, it was discarded because of conflicts. */
-bool rule_never_reduced_p (rule_t *r);
+bool rule_never_reduced_p (rule *r);
-/* Print this RULE's number and lhs on OUT. If a PREVIOUS_LHS was
+/* Print this rule's number and lhs on OUT. If a PREVIOUS_LHS was
already displayed (by a previous call for another rule), avoid
useless repetitions. */
-void rule_lhs_print (rule_t *rule, symbol_t *previous_lhs, FILE *out);
+void rule_lhs_print (rule *r, symbol *previous_lhs, FILE *out);
/* Return the length of the RHS. */
-int rule_rhs_length (rule_t *rule);
+int rule_rhs_length (rule *r);
-/* Print this RULE's RHS on OUT. */
-void rule_rhs_print (rule_t *rule, FILE *out);
+/* Print this rule's RHS on OUT. */
+void rule_rhs_print (rule *r, FILE *out);
-/* Print this RULE on OUT. */
-void rule_print (rule_t *rule, FILE *out);
+/* Print this rule on OUT. */
+void rule_print (rule *r, FILE *out);
/* Table of the symbols, indexed by the symbol number. */
-extern symbol_t **symbols;
+extern symbol **symbols;
/* TOKEN_TRANSLATION -- a table indexed by a token number as returned
by the user's yylex routine, it yields the internal token number
used by the parser and throughout bison. */
-extern symbol_number_t *token_translations;
+extern symbol_number *token_translations;
extern int max_user_token_number;
-/* GLR_PARSER is nonzero if the input file says to use the GLR
- (Generalized LR) parser, and to output some additional
- information used by the GLR algorithm. */
-
-extern int glr_parser;
-
-/* PURE_PARSER is nonzero if should generate a parser that is all pure
- and reentrant. */
-
-extern int pure_parser;
-
/* Dump RITEM for traces. */
void ritem_print (FILE *out);
/* Print the grammar's rules numbers from BEGIN (inclusive) to END
(exclusive) on OUT under TITLE. */
void grammar_rules_partial_print (FILE *out, const char *title,
- rule_filter_t filter);
+ rule_filter filter);
/* Print the grammar's rules on OUT. */
void grammar_rules_print (FILE *out);
projects / bison.git / blobdiff