104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
/*
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Copyright (C) 2001-2006, William Joseph.
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All Rights Reserved.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#if !defined( INCLUDED_GENERIC_REFERENCE_H )
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#define INCLUDED_GENERIC_REFERENCE_H
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/// \file
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/// \brief Wrappers to allow storing objects in templated containers using 'reference' semantics.
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/// \brief A reference to a mutable object.
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/// Has 'reference' semantics, except for \c 'operator==' and \c 'operator.'.
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/// \param Type The type of the referenced object.
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template<typename Type>
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class Reference
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{
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Type* m_contained;
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public:
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explicit Reference( Type& contained ) : m_contained( &contained ){
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}
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operator Type&() const
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{
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return *m_contained;
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}
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Type& get() const {
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return *m_contained;
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}
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Type* get_pointer() const {
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return m_contained;
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}
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};
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template<typename Type>
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bool operator<( const Reference<Type>& self, const Reference<Type>& other ){
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return self.get() < other.get();
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}
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template<typename Type>
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bool operator==( const Reference<Type>& self, const Reference<Type>& other ){
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return self.get() == other.get();
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}
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/// \brief construct a reference to a mutable object.
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template<typename Type>
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inline Reference<Type> makeReference( Type& value ){
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return Reference<Type>( value );
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}
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/// \brief A reference to a non-mutable object.
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/// Has 'reference' semantics, except for \c 'operator==' and \c 'operator.'.
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/// \param Type The type of the referenced object.
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template<typename Type>
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class ConstReference
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{
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const Type* m_contained;
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public:
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explicit ConstReference( const Type& contained ) : m_contained( &contained ){
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}
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operator const Type&() const
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{
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return *m_contained;
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}
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const Type& get() const {
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return *m_contained;
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}
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const Type* get_pointer() const {
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return m_contained;
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}
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};
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template<typename Type>
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bool operator<( const ConstReference<Type>& self, const ConstReference<Type>& other ){
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return self.get() < other.get();
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}
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template<typename Type>
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bool operator==( const ConstReference<Type>& self, const ConstReference<Type>& other ){
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return self.get() == other.get();
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}
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/// \brief construct a reference to a non-mutable object.
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template<typename Type>
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inline ConstReference<Type> makeReference( const Type& value ){
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return ConstReference<Type>( value );
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}
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#endif
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