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any_of.hpp
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1 // This file is part of the Acts project.
2 //
3 // Copyright (C) 2016-2018 CERN for the benefit of the Acts project
4 //
5 // This Source Code Form is subject to the terms of the Mozilla Public
6 // License, v. 2.0. If a copy of the MPL was not distributed with this
7 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 
9 #pragma once
10 #include <type_traits>
11 
12 namespace Acts {
13 
14 namespace detail {
15 
16 namespace {
17 // clang-format off
18  template <bool... values>
19  struct any_of : std::false_type {};
20 
21  template <bool... others>
22  struct any_of<true, others...> : public std::true_type {};
23 
24  template <bool... others>
25  struct any_of<false, others...> : public any_of<others...> {};
26 // clang-format on
27 } // namespace
28 
29 template <bool... values>
30 constexpr bool any_of_v = any_of<values...>::value;
31 } // namespace detail
32 
33 } // namespace Acts