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/*
* Copyright 2002 - 2016, The libsigc++ Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef SIGC_REFERENCE_WRAPPER_H
#define SIGC_REFERENCE_WRAPPER_H
#include <functional>
namespace sigc
{
template <typename T_type>
struct unwrap_reference
{
using type = T_type;
};
template <typename T_type>
struct unwrap_reference<std::reference_wrapper<T_type>>
{
using type = T_type&;
};
template <typename T_type>
struct unwrap_reference<std::reference_wrapper<const T_type>>
{
using type = const T_type&;
};
template <typename T_type>
T_type&
unwrap(const std::reference_wrapper<T_type>& v)
{
return v;
}
template <typename T_type>
const T_type&
unwrap(const std::reference_wrapper<const T_type>& v)
{
return v;
}
} /* namespace sigc */
#endif /* SIGC_REFERENCE_WRAPPER_H */
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