modules/up/src/gnug++/SymbolConjunctPtr.Bag.h
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FUNCTIONS
This source file includes following functions.
- SymbolConjunctPtrBag
- SymbolConjunctPtrBag
- length
- empty
- contains
// 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 _SymbolConjunctPtrBag_h
#ifdef __GNUG__
#pragma interface
#endif
#define _SymbolConjunctPtrBag_h 1
#include "config.h"
#include "Pix.h"
#include "SymbolConjunctPtr.defs.h"
class SymbolConjunctPtrBag
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{
protected:
int count;
public:
virtual ~SymbolConjunctPtrBag();
int length(); // current number of items
int empty();
virtual Pix add(SymbolConjunctPtr item) = 0; // add item; return Pix
virtual void del(SymbolConjunctPtr item) = 0; // delete 1 occurrence of item
#undef remove
virtual void remove(SymbolConjunctPtr item); // delete all occurrences
virtual void clear(); // delete all items
virtual int contains(SymbolConjunctPtr item); // is item in Bag?
virtual int nof(SymbolConjunctPtr 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 SymbolConjunctPtr& operator () (Pix i) = 0; // access item at i
virtual Pix seek(SymbolConjunctPtr 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 SymbolConjunctPtrBag::~SymbolConjunctPtrBag() {}
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inline int SymbolConjunctPtrBag::length()
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{
return count;
}
inline int SymbolConjunctPtrBag::empty()
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{
return count == 0;
}
inline int SymbolConjunctPtrBag::contains(SymbolConjunctPtr item)
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{
return seek(item) != 0;
}
#endif