common/typetraits/typetraits.hh

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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_TYPE_TRAITS_HH
#define DUMUX_TYPE_TRAITS_HH
 
#include <type_traits>
 
namespace Dumux {
 
template<typename T>
struct AlwaysFalse : public std::false_type {};
 
inline constexpr auto noop = [] (auto...) {};
using Noop = decltype(noop);
 
template<typename Default, typename T>
using NonVoidOr = std::conditional_t<!std::is_void_v<T>, T, Default>;
 
} // end namespace Dumux
 
#endif