New file: skeleton for GLR (Generalized LR) parser.

[bison.git] / src / gram.h

diff --git a/src/gram.h b/src/gram.h
index af4e636cac758950f83e80c1cad1a7d0007a0199..b0f9daefcea4fcccd8d9348bbb544faaebfe28db 100644 (file)
--- a/src/gram.h
+++ b/src/gram.h
@@ -81,11 +81,9 @@
    contains minus R, which identifies it as the end of a portion and
    says which rule it is for.
 
-   The portions of RITEM come in order of increasing rule number and
-   are followed by an element which is zero to mark the end.  nritems
-   is the total length of ritem, not counting the final zero.  Each
-   element of RITEM is called an "item" and its index in RITEM is an
-   item number.
+   The portions of RITEM come in order of increasing rule number.
+   NRITEMS is the total length of RITEM.  Each element of RITEM is
+   called an "item" and its index in RITEM is an item number.
 
    Item numbers are used in the finite state machine to represent
    places that parsing can get to.
@@ -99,31 +97,32 @@
 
    Associativities are recorded similarly in SYMBOLS[I]->assoc.  */
 
-#include "symtab.h"
+# include "location.h"
+# include "symtab.h"
 
-#define        ISTOKEN(s)      ((s) < ntokens)
-#define        ISVAR(s)        ((s) >= ntokens)
+# 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
+# define ITEM_NUMBER_MAX INT_MAX
 typedef int item_number_t;
 extern item_number_t *ritem;
-extern int nritems;
+extern unsigned int nritems;
 
 /* There is weird relationship between item_number_t and
-   token_number_t: we store token_number_t in item_number_t, but in
+   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.
 
-   Therefore, an token_number_t must be a valid item_number_t, and we
+   Therefore, an symbol_number_t must be a valid item_number_t, and we
    sometimes have to perform the converse transformation.  */
-#define token_number_as_item_number(Tok) ((item_number_t) (Tok))
-#define item_number_as_token_number(Ite) ((token_number_t) (Ite))
+# define symbol_number_as_item_number(Tok) ((item_number_t) (Tok))
+# define item_number_as_symbol_number(Ite) ((symbol_number_t) (Ite))
 
-extern token_number_t start_symbol;
+extern symbol_number_t start_symbol;
 
 
 typedef struct rule_s
@@ -145,11 +144,11 @@ typedef struct rule_s
   /* This symbol was attached to the rule via %prec. */
   symbol_t *precsym;
 
-  int line;
+  location_t location;
   bool useful;
 
   const char *action;
-  int action_line;
+  location_t action_location;
 } rule_t;
 
 extern struct rule_s *rules;
@@ -160,7 +159,7 @@ extern symbol_t **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 token_number_t *token_translations;
+extern symbol_number_t *token_translations;
 extern int max_user_token_number;
 
 
@@ -169,15 +168,29 @@ extern int max_user_token_number;
 
 extern int pure_parser;
 
-/* Report the length of the RHS. */
+/* Return the length of the RHS.  */
 int rule_rhs_length PARAMS ((rule_t *rule));
 
+/* Print this RULE's RHS on OUT.  */
+void rule_rhs_print PARAMS ((rule_t *rule, FILE *out));
+
+/* Print this RULE on OUT.  */
+void rule_print PARAMS ((rule_t *rule, FILE *out));
+
 /* Dump RITEM for traces. */
 void ritem_print PARAMS ((FILE *out));
 
 /* Return the size of the longest rule RHS.  */
 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));
+
+/* Print the grammar's rules on OUT.  */
+void grammar_rules_print PARAMS ((FILE *out));
+
 /* Dump the grammar. */
 void grammar_dump PARAMS ((FILE *out, const char *title));