Reference documentation for deal.II version 9.5.0
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type_traits.h
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1// ---------------------------------------------------------------------
2//
3// Copyright (C) 2023 by the deal.II authors
4//
5// This file is part of the deal.II library.
6//
7// The deal.II library is free software; you can use it, redistribute
8// it, and/or modify it under the terms of the GNU Lesser General
9// Public License as published by the Free Software Foundation; either
10// version 2.1 of the License, or (at your option) any later version.
11// The full text of the license can be found in the file LICENSE.md at
12// the top level directory of deal.II.
13//
14// ---------------------------------------------------------------------
15#ifndef dealii_cxx20_type_traits_h
16#define dealii_cxx20_type_traits_h
17
18#include <deal.II/base/config.h>
19
20#ifdef DEAL_II_HAVE_CXX20
21# include <type_traits>
22#endif
23
25
26namespace std_cxx20
27{
28#ifdef DEAL_II_HAVE_CXX20
29 using std::type_identity;
30 using std::type_identity_t;
31#else
89 template <typename T>
91 {
92 using type = T;
93 };
94
95 template <class T>
97
98#endif
99} // namespace std_cxx20
100
102
103#endif
#define DEAL_II_NAMESPACE_OPEN
Definition config.h:472
#define DEAL_II_NAMESPACE_CLOSE
Definition config.h:473
typename type_identity< T >::type type_identity_t
Definition type_traits.h:96