b4_args is more general than only C++.

[bison.git] / src / closure.h

diff --git a/src/closure.h b/src/closure.h
index 2325e7c4e8f9c32c96d7d3538dd6703916914561..045daa910e44cac19816adc98d36004a374507a1 100644 (file)
--- a/src/closure.h
+++ b/src/closure.h
@@ -1,49 +1,57 @@
 /* Subroutines for bison
 /* Subroutines for bison

-   Copyright (C) 1984, 1989, 2000 Free Software Foundation, Inc.
+
+   Copyright (C) 1984, 1989, 2000, 2001, 2002, 2007 Free Software
+   Foundation, Inc.

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

-   Bison is free software; you can redistribute it and/or modify it
-   under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2, or (at your option)
-   any later version.
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.

 
 

-   Bison is distributed in the hope that it will be useful, but
-   WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   General Public License for more details.
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.

 
    You should have received a copy of the GNU General Public License
 
    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.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

 
 

+#ifndef CLOSURE_H_
+# define CLOSURE_H_

 
 

-/* Subroutines of file LR0.c. */
+# include "gram.h"

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

-void new_closure PARAMS ((int n));
+void new_closure (unsigned 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 sorted 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 sorted 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 (item_number *items, size_t n);
+

 
 

-void closure PARAMS ((short *items, int n));
+/* Frees ITEMSET, RULESET and internal data.  */

 
 

+void free_closure (void);

 
 

-/* Frees itemset, ruleset and internal data.  */
+extern item_number *itemset;
+extern size_t nitemset;

 
 

-void free_closure PARAMS ((void));
+#endif /* !CLOSURE_H_ */