82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the JavaScript 2 Prototype.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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#ifndef world_h___
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#define world_h___
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#include "strings.h"
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#include "token.h"
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#include "hash.h"
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namespace JavaScript {
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//
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// String atom management
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//
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// A StringAtom is a String for which the following guarantee applies:
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// StringAtoms A and B have the same character sequences if and only if A and
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// B are the same StringAtom.
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class StringAtom: public String {
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public:
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Token::Kind tokenKind; // Token::Kind if this is a keyword; Token::identifier if not
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explicit StringAtom(const String &s): String(s), tokenKind(Token::identifier) {}
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private:
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StringAtom(const StringAtom &); // No copy constructor
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void operator=(const StringAtom &); // No assignment operator
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};
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inline bool operator==(const StringAtom &s1, const StringAtom &s2) {return &s1 == &s2;}
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inline bool operator!=(const StringAtom &s1, const StringAtom &s2) {return &s1 != &s2;}
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class StringAtomTable {
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typedef HashTable<StringAtom, const String &> HT;
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HT ht;
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public:
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StringAtom &operator[](const String &s);
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StringAtom &operator[](const char *s) {return operator[](widenCString(s));}
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};
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class World {
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public:
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StringAtomTable identifiers;
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World();
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};
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}
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#endif
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