/*!
* \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 {
//! if_
//! @{
template
struct if_ {
typedef _T1 type;
};
template
struct if_ {
typedef _T2 type;
};
//! @}
//! enable_if
//! @{
template
struct enable_if { };
// Partial specialization for true.
template
struct enable_if {
typedef _Tp type;
};
//! Alias template for enable_if
template
using enable_if_t = typename enable_if<_C, _Tp>::type;
//! @}
}
//! @}
#endif /* __utl_meta_if_h__ */