44 lines
1.0 KiB
C
44 lines
1.0 KiB
C
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// Copyright (c) 2009 INRIA Sophia-Antipolis (France).
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// All rights reserved.
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//
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// This file is part of CGAL (www.cgal.org)
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//
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// $URL: https://github.com/CGAL/cgal/blob/v5.1/STL_Extension/include/CGAL/tuple.h $
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// $Id: tuple.h 52164b1 2019-10-19T15:34:59+02:00 Sébastien Loriot
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// SPDX-License-Identifier: LGPL-3.0-or-later OR LicenseRef-Commercial
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//
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// Author(s) : Sebastien Loriot, Sylvain Pion
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#ifndef CGAL_TUPLE_H
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#define CGAL_TUPLE_H
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# include <tuple>
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namespace CGAL {
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// Tool to test whether a type V is among the types of a tuple<...> = T.
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template <typename V, typename T>
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struct Is_in_tuple;
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template <typename V, typename T0, typename... T>
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struct Is_in_tuple <V, std::tuple<T0, T...> >
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{
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static const bool value = Is_in_tuple<V, std::tuple<T...> >::value;
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};
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template <typename V, typename... T>
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struct Is_in_tuple <V, std::tuple<V, T...> >
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{
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static const bool value = true;
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};
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template <typename V>
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struct Is_in_tuple <V, std::tuple<> >
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{
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static const bool value = false;
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};
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} //namespace CGAL
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#endif // CGAL_TUPLE_H
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