* data/yacc.c: Guard the declaration of yytoknum also with

[bison.git] / src / closure.h

diff --git a/src/closure.h b/src/closure.h
index 2325e7c4e8f9c32c96d7d3538dd6703916914561..e47d8d38083295189bd4e55d7fd143223780d8eb 100644 (file)
--- a/src/closure.h
+++ b/src/closure.h
@@ -1,5 +1,5 @@
 /* Subroutines for bison
 /* Subroutines for bison

-   Copyright (C) 1984, 1989, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1984, 1989, 2000, 2001, 2002  Free Software Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 


@@ -18,8 +18,8 @@
    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
    02111-1307, USA.  */
 
    Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
    02111-1307, USA.  */
 

-
-/* Subroutines of file LR0.c. */
+#ifndef CLOSURE_H_
+# define CLOSURE_H_

 
 /* Allocates the itemset and ruleset vectors, and precomputes useful
    data so that closure can be called.  n is the number of elements to
 
 /* Allocates the itemset and ruleset vectors, and precomputes useful
    data so that closure can be called.  n is the number of elements to


@@ -28,22 +28,28 @@
 void new_closure PARAMS ((int n));
 
 
 void new_closure PARAMS ((int n));
 
 

-/* Given a vector of item numbers ITEMS, of length N, set up ruleset
-   and itemset to indicate what rules could be run and which items
-   could be accepted when those items are the active ones.
+/* Given the kernel (aka core) of a state (a vector of item numbers
+   ITEMS, of length N), set up RULESET and ITEMSET to indicate what
+   rules could be run and which items could be accepted when those
+   items are the active ones.

 
 

-   ruleset contains a bit for each rule.  closure sets the bits for
+   RULESET contains a bit for each rule.  CLOSURE sets the bits for

    all rules which could potentially describe the next input to be
    read.
 
    all rules which could potentially describe the next input to be
    read.
 

-   itemset is a vector of item numbers; itemsetend points to just
-   beyond the end of the part of it that is significant.  closure
-   places there the indices of all items which represent units of
-   input that could arrive next.  */
+   ITEMSET is a vector of item numbers; NITEMSET is its size
+   (actually, points to just beyond the end of the part of it that is
+   significant).  CLOSURE places there the indices of all items which
+   represent units of input that could arrive next.  */

 
 

-void closure PARAMS ((short *items, int n));
+void closure PARAMS ((item_number_t *items, int n));

 
 
 
 

-/* Frees itemset, ruleset and internal data.  */
+/* Frees ITEMSET, RULESET and internal data.  */

 
 void free_closure PARAMS ((void));
 
 void free_closure PARAMS ((void));

+
+extern item_number_t *itemset;
+extern int nritemset;
+
+#endif /* !CLOSURE_H_ */