/*!
* \file if.h
* \brief Template meta-programming conditional helpers
*
* Copyright (C) 2018 Christos Choutouridis
*
* This program 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 3
* of the License, or (at your option) any later version.
*
* This program 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 program. If not, see .
*/
#ifndef __utl_meta_if_h__
#define __utl_meta_if_h__
#include
/*!
* \ingroup meta
* \defgroup if
* conditional type support header
*/
//! @{
namespace utl {
//! select _T1 or _T2 based on _C
//! @{
template
struct select_ {
typedef _T1 type;
};
template
struct select_ {
typedef _T2 type;
};
//! @}
//! select _Tp if _C is true, else SFINAE
//! @{
template
struct if_ {
typedef _Tp type;
};
template // Partial specialization for false.
struct if_ { };
}
//! @}
#endif /* __utl_meta_if_h__ */