Future/bison
1
0
Fork 0
mirror of https://git.savannah.gnu.org/git/bison.git synced 2026-03-14 06:43:03 +00:00
Code Issues Packages Projects Releases Wiki Activity

* src/gram.h (rule_number_t, RULE_NUMBER_MAX, int_of_rule_number)

Browse Source 
(item_number_of_rule_number, rule_number_of_item_number): New.
* src/LR0.c, src/closure.c, src/derives.c, src/derives.h,
* src/gram.c, src/lalr.c, src/nullable.c, src/output.c, src/print.c,
* src/print_graph.c, src/reader.c, src/reduce.c, src/reduce.h:
Propagate their use.
Much remains to be done, in particular wrt `shorts' from types.h.
This commit is contained in:
Akim Demaille
2002-06-30 17:31:19 +00:00
parent 260008e546
commit 9222837b27
15 changed files with 202 additions and 156 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
src/gram.h
View File

@@ -107,19 +107,19 @@
# define ISTOKEN(s) ((s) < ntokens)
# define ISVAR(s) ((s) >= ntokens)
extern int nrules;
extern int nsyms;
extern int ntokens;
extern int nvars;
# define ITEM_NUMBER_MAX INT_MAX
typedef int item_number_t;
# define ITEM_NUMBER_MAX ((item_number_t) INT_MAX)
extern item_number_t *ritem;
extern unsigned int nritems;
/* There is weird relationship between item_number_t and
symbol_number_t: we store symbol_number_t in item_number_t, but in
the latter we also store, as negative numbers, the rule numbers.
/* 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 are stored.
Therefore, an symbol_number_t must be a valid item_number_t, and we
sometimes have to perform the converse transformation. */
@@ -128,16 +128,28 @@ extern unsigned int nritems;
extern symbol_number_t start_symbol;
/* 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 item_number_of_rule_number(RNum) ((item_number_t) (- RNum))
# define rule_number_of_item_number(INum) ((rule_number_t) (- INum))
/*--------.
| Rules. |
`--------*/
typedef struct rule_s
{
/* The number of the rule in the source. It is usually the index in
RULES too, except if there are useless rules. */
short user_number;
rule_number_t user_number;
/* The index in RULES. Usually the rule number in the source,
except if some rules are useless. */
short number;
rule_number_t number;
symbol_t *lhs;
item_number_t *rhs;
@@ -199,7 +211,8 @@ size_t ritem_longest_rhs PARAMS ((void));
/* Print the grammar's rules numbers from BEGIN (inclusive) to END
(exclusive) on OUT under TITLE. */
void grammar_rules_partial_print PARAMS ((FILE *out, const char *title,
int begin, int end));
rule_number_t begin,
rule_number_t end));
/* Print the grammar's rules on OUT. */
void grammar_rules_print PARAMS ((FILE *out));