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53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
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/*
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* The contents of this file are subject to the Initial
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* Developer's Public License Version 1.0 (the "License");
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* you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
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*
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* Software distributed under the License is distributed AS IS,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied.
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* See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Original Code was created by Adriano dos Santos Fernandes
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* for the Firebird Open Source RDBMS project.
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*
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* Copyright (c) 2010 Adriano dos Santos Fernandes <adrianosf@gmail.com>
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* and all contributors signed below.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*/
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#ifndef COMMON_NEST_CONST_H
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#define COMMON_NEST_CONST_H
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// Encloses a pointer to cascade parent object constness.
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template <typename T>
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class NestConst
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{
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public:
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NestConst(T* aPtr = NULL)
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: ptr(aPtr)
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{
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}
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NestConst<T>& operator =(T* aPtr)
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{
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ptr = aPtr;
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return *this;
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}
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operator T*() { return ptr; }
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operator const T*() const { return ptr; }
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T* operator ->() { return ptr; }
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const T* operator ->() const { return ptr; }
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private:
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T* ptr;
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};
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#endif // COMMON_NEST_CONST_H
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