dune-common 2.9.0
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promotiontraits.hh
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1// -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2// vi: set et ts=4 sw=2 sts=2:
3// SPDX-FileCopyrightInfo: Copyright (C) DUNE Project contributors, see file LICENSE.md in module root
4// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
5#ifndef DUNE_PROMOTIONTRAITS_HH
6#define DUNE_PROMOTIONTRAITS_HH
7
8#include <utility>
9
10namespace Dune {
25 template <typename T1, typename T2>
27 {
28 typedef decltype(std::declval<T1>()+std::declval<T2>()) PromotedType;
29 };
30
31 // Specialization for the case of two equal types
32 // One should think that the generic template should handle this case as well.
33 // However, the fvectortest.cc unit test fails without it if ENABLE_GMP is set.
34 template <typename T1>
35 struct PromotionTraits<T1,T1> { typedef T1 PromotedType; };
36
38} // end namespace
39
40
41#endif // DUNE_PROMOTIONTRAITS_HH
Dune namespace.
Definition alignedallocator.hh:13
Compute type of the result of an arithmetic operation involving two different number types.
Definition promotiontraits.hh:27
decltype(std::declval< T1 >()+std::declval< T2 >()) PromotedType
Definition promotiontraits.hh:28
T1 PromotedType
Definition promotiontraits.hh:35