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132 lines
4.5 KiB
132 lines
4.5 KiB
/* /////////////////////////////////////////////////////////////////////////
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* File: stlsoft/obsolete/explicit_inheritance_veneer.hpp
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*
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* Purpose: Explicit inheritance veneer class.
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*
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* Created: 13th January 2003
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* Updated: 10th August 2009
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*
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* Home: http://stlsoft.org/
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*
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* Copyright (c) 2003-2009, Matthew Wilson and Synesis Software
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
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* any contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* ////////////////////////////////////////////////////////////////////// */
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/// \file stlsoft/obsolete/explicit_inheritance_veneer.hpp
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///
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/// Explicit inheritance veneer class.
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#ifndef STLSOFT_INCL_STLSOFT_OBSOLETE_HPP_EXPLICIT_INHERITANCE_VENEER
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#define STLSOFT_INCL_STLSOFT_OBSOLETE_HPP_EXPLICIT_INHERITANCE_VENEER
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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# define STLSOFT_VER_STLSOFT_OBSOLETE_HPP_EXPLICIT_INHERITANCE_VENEER_MAJOR 4
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# define STLSOFT_VER_STLSOFT_OBSOLETE_HPP_EXPLICIT_INHERITANCE_VENEER_MINOR 0
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# define STLSOFT_VER_STLSOFT_OBSOLETE_HPP_EXPLICIT_INHERITANCE_VENEER_REVISION 2
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# define STLSOFT_VER_STLSOFT_OBSOLETE_HPP_EXPLICIT_INHERITANCE_VENEER_EDIT 37
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* /////////////////////////////////////////////////////////////////////////
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* Includes
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*/
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#ifndef STLSOFT_INCL_STLSOFT_H_STLSOFT
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# include <stlsoft/stlsoft.h>
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#endif /* !STLSOFT_INCL_STLSOFT_H_STLSOFT */
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#ifndef STLSOFT_INCL_STLSOFT_UTIL_HPP_CONSTRAINTS
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# include <stlsoft/util/constraints.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_UTIL_HPP_CONSTRAINTS */
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/* /////////////////////////////////////////////////////////////////////////
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* Namespace
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*/
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#ifndef _STLSOFT_NO_NAMESPACE
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namespace stlsoft
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{
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#endif /* _STLSOFT_NO_NAMESPACE */
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/* /////////////////////////////////////////////////////////////////////////
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* Classes
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*/
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// class explicit_inheritance_veneer
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/** \brief Applies a \c protected veneer over a type, which can be accessed only
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* through conversions to the veneered type
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*
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* \param T The type to be subject to the veneer
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*
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* \ingroup group__library__obsolete
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*
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*/
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template <ss_typename_param_k T>
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struct explicit_inheritance_veneer
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: protected T
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{
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public:
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/// The base class type
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typedef T base_type;
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// Conversion
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public:
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/// The conversion operator that provides access to the base type
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base_type const* operator &() const
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{
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stlsoft_constraint_must_be_same_size(T, explicit_inheritance_veneer<T>);
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return this;
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}
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// Implementation
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protected:
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/// Access a mutable reference to the base type
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base_type& base_type_value()
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{
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return *this;
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}
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/// Access a non-mutable reference to the base type
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base_type const& base_type_value() const
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{
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return *this;
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}
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};
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/* ////////////////////////////////////////////////////////////////////// */
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#ifndef _STLSOFT_NO_NAMESPACE
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} // namespace stlsoft
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#endif /* _STLSOFT_NO_NAMESPACE */
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/* ////////////////////////////////////////////////////////////////////// */
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#endif /* !STLSOFT_INCL_STLSOFT_OBSOLETE_HPP_EXPLICIT_INHERITANCE_VENEER */
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/* ///////////////////////////// end of file //////////////////////////// */
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