1 files changed, 79 insertions, 0 deletions
diff --git a/gnu/lib/libg++/g++-include/Bag.hP b/gnu/lib/libg++/g++-include/Bag.hP
new file mode 100644
index 000000000000..4b9a87a9099c
--- /dev/null
+++ b/gnu/lib/libg++/g++-include/Bag.hP
@@ -0,0 +1,79 @@
+// This may look like C code, but it is really -*- C++ -*-
+/* 
+Copyright (C) 1988 Free Software Foundation
+    written by Doug Lea (dl@rocky.oswego.edu)
+
+This file is part of the GNU C++ Library.  This library is free
+software; you can redistribute it and/or modify it under the terms of
+the GNU Library General Public License as published by the Free
+Software Foundation; either version 2 of the License, or (at your
+option) any later version.  This library 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 Library General Public License for more details.
+You should have received a copy of the GNU Library General Public
+License along with this library; if not, write to the Free Software
+Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+
+#ifndef _<T>Bag_h
+#ifdef __GNUG__
+#pragma interface
+#endif
+#define _<T>Bag_h 1
+
+#include <Pix.h>
+#include "<T>.defs.h"
+
+class <T>Bag
+{
+protected:
+  int                   count;
+
+public:
+  virtual              ~<T>Bag();
+
+  int                   length();                // current number of items
+  int                   empty();
+
+  virtual Pix           add(<T&> item) = 0;      // add item; return Pix
+
+  virtual void          del(<T&> item) = 0;      // delete 1 occurrence of item
+#undef remove
+  virtual void          remove(<T&> item);       // delete all occurrences
+  virtual void          clear();                 // delete all items
+
+  virtual int           contains(<T&> item);     // is item in Bag?
+  virtual int           nof(<T&> item);          // how many in Bag?
+
+  virtual Pix           first() = 0;             // Pix of first item or 0
+  virtual void          next(Pix& i) = 0;        // advance to next or 0
+
+  virtual <T>&          operator () (Pix i) = 0; // access item at i
+
+  virtual Pix           seek(<T&> item, Pix from=0); // Pix of next occurrence
+  virtual int           owns(Pix i);             // is i a valid Pix  ?
+
+  void                  error(const char* msg);
+  virtual int           OK() = 0;                // rep invariant
+};
+
+inline <T>Bag::~<T>Bag() {}
+
+inline int <T>Bag::length()
+{
+  return count;
+}
+
+inline int <T>Bag::empty()
+{
+  return count == 0;
+}
+
+inline int <T>Bag::contains(<T&> item)
+{
+  return seek(item) != 0;
+}
+ 
+#endif