std_extensions.hpp

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#ifndef GKO_CORE_STD_EXTENSIONS_HPP_
#define GKO_CORE_STD_EXTENSIONS_HPP_


#include <memory>
#include <type_traits>


// This header provides implementations of useful utilities introduced into the
// C++ standard after C++11 (i.e. C++14 and C++17).
// For documentation about these utilities refer to the newer version of the
// standard.


namespace gko {
namespace xstd {
namespace detail {


template <typename... Ts>
struct make_void {
    using type = void;
};


}  // namespace detail


template <typename... Ts>
using void_t = typename detail::make_void<Ts...>::type;


template <bool B, typename T = void>
using enable_if_t = typename std::enable_if<B, T>::type;


template <bool B, typename T, typename F>
using conditional_t = typename std::conditional<B, T, F>::type;


template <typename T>
using decay_t = typename std::decay<T>::type;


}  // namespace xstd
}  // namespace gko


#endif  // GKO_CORE_STD_EXTENSIONS_HPP_