86 lines
2.2 KiB
Plaintext
86 lines
2.2 KiB
Plaintext
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// TR1 functional header -*- C++ -*-
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// Copyright (C) 2004 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library 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 along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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/** @file
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* This is a TR1 C++ Library header.
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*/
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#ifndef _TR1_FUNCTIONAL
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#define _TR1_FUNCTIONAL 1
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#include "../functional"
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namespace std
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{
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namespace tr1
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{
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template<typename _Tp>
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class reference_wrapper
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{
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_Tp* _M_data;
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public:
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typedef _Tp type;
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explicit reference_wrapper(_Tp& __indata): _M_data(&__indata)
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{ }
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reference_wrapper(const reference_wrapper<_Tp>& __inref):
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_M_data(__inref._M_data)
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{ }
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reference_wrapper&
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operator=(const reference_wrapper<_Tp>& __inref)
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{
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_M_data = __inref._M_data;
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return *this;
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}
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operator _Tp&() const
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{ return this->get(); }
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_Tp&
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get() const
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{ return *_M_data; }
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};
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// Denotes a reference should be taken to a variable.
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template<typename _Tp>
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reference_wrapper<_Tp>
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ref(_Tp& __t)
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{ return reference_wrapper<_Tp>(__t); }
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// Denotes a const reference should be taken to a variable.
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template<typename _Tp>
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reference_wrapper<const _Tp>
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cref(const _Tp& __t)
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{ return reference_wrapper<const _Tp>(__t); }
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template<typename _Tp>
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reference_wrapper<_Tp> ref(reference_wrapper<_Tp> __t)
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{ return ref(__t.get()); }
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template<typename _Tp>
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reference_wrapper<const _Tp> cref(reference_wrapper<_Tp> __t)
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{ return cref(__t.get()); }
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}
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}
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#endif
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