-/* 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
Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
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;
+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;
+}
+
+/* Rule numbers. */
+typedef short rule_number;
+extern rule_number nrules;
+
+static inline item_number
+rule_number_as_item_number (rule_number r)
+{
+ return -1 - r;
+}
-/* 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))
+static inline rule_number
+item_number_as_rule_number (item_number i)
+{
+ return -1 - i;
+}
/*--------.
| 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;
/* 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);
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