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33 lines
1.2 KiB
C++
33 lines
1.2 KiB
C++
2 years ago
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// Copyright (C) 2020 T. Zachary Laine
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_STL_INTERFACES_CONFIG_HPP
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#define BOOST_STL_INTERFACES_CONFIG_HPP
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// Included for definition of __cpp_lib_concepts.
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#include <iterator>
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#if defined(__cpp_lib_concepts) && !defined(BOOST_STL_INTERFACES_DISABLE_CONCEPTS)
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#define BOOST_STL_INTERFACES_USE_CONCEPTS 1
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#else
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#define BOOST_STL_INTERFACES_USE_CONCEPTS 0
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#endif
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// The inline namespaces v1 and v2 represent pre- and post-C++20. v1 is
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// inline for standards before C++20, and v2 is inline for C++20 and later.
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// Note that this only applies to code for which a v2 namespace alternative
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// exists. Some instances of the v1 namespace may still be inline, if there
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// is no v2 version of its contents.
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#if BOOST_STL_INTERFACES_USE_CONCEPTS
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# define BOOST_STL_INTERFACES_NAMESPACE_V1 namespace v1
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# define BOOST_STL_INTERFACES_NAMESPACE_V2 inline namespace v2
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#else
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# define BOOST_STL_INTERFACES_NAMESPACE_V1 inline namespace v1
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# define BOOST_STL_INTERFACES_NAMESPACE_V2 namespace v2
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#endif
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#endif
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