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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_TYPE_TRAIT_H
#define SIGC_TYPE_TRAIT_H
#include <sigc++config.h>
namespace sigc
{
template<typename T_type>
struct type_trait
{
using pass = T_type&;
using take = const T_type&;
};
template<typename T_type, int N>
struct type_trait<T_type[N]>
{
using pass = T_type*&;
using take = const T_type*&;
};
template<typename T_type>
struct type_trait<T_type&>
{
using pass = T_type&;
using take = T_type&;
};
template<typename T_type>
struct type_trait<const T_type&>
{
using pass = const T_type&;
using take = const T_type&;
};
template<typename T_type>
struct type_trait<T_type&&>
{
using pass = T_type&&;
using take = T_type&&;
};
template<>
struct type_trait<void>
{
using pass = void;
using take = void;
};
template<typename T>
using type_trait_pass_t = typename type_trait<T>::pass;
template<typename T>
using type_trait_take_t = typename type_trait<T>::take;
} /* namespace sigc */
#endif /* SIGC_TYPE_TRAIT_H */
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