pjs/js/js2/world.h

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C
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2000-01-11 00:22:43 +03:00
// -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
//
// The contents of this file are subject to the Netscape Public
// License Version 1.1 (the "License"); you may not use this file
// except in compliance with the License. You may obtain a copy of
// the License at http://www.mozilla.org/NPL/
//
// Software distributed under the License is distributed on an "AS
// IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
// implied. See the License for the specific language governing
// rights and limitations under the License.
//
// The Original Code is the JavaScript 2 Prototype.
//
// The Initial Developer of the Original Code is Netscape
// Communications Corporation. Portions created by Netscape are
// Copyright (C) 1998 Netscape Communications Corporation. All
// Rights Reserved.
#ifndef world_h
#define world_h
#include "utilities.h"
#include "hash.h"
namespace JavaScript {
//
// String atom management
//
// A StringAtom is a String for which the following guarantee applies:
// StringAtoms A and B have the same character sequences if and only if A and B are the
// same StringAtom.
class StringAtom: public String {
public:
explicit StringAtom(const String &s): String(s) {}
private:
StringAtom(const StringAtom&); // No copy constructor
void operator=(const StringAtom&); // No assignment operator
};
inline bool operator==(const StringAtom &s1, const StringAtom &s2) {return &s1 == &s2;}
inline bool operator!=(const StringAtom &s1, const StringAtom &s2) {return &s1 != &s2;}
class StringAtomTable {
typedef HashTable<StringAtom, const String&> HT;
HT ht;
public:
StringAtom &operator[](const String &s);
};
class World {
StringAtomTable identifiers;
};
}
#endif