49 lines
2.0 KiB
C++
49 lines
2.0 KiB
C++
// 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(__cpp_lib_ranges) && \
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!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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#if defined(__cpp_explicit_this_parameter) && \
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BOOST_STL_INTERFACES_USE_CONCEPTS && \
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!defined(BOOST_STL_INTERFACES_DISABLE_DEDUCED_THIS)
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#define BOOST_STL_INTERFACES_USE_DEDUCED_THIS 1
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#else
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#define BOOST_STL_INTERFACES_USE_DEDUCED_THIS 0
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#endif
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// The inline namespaces v1, v2, and v3 represent C++14, C++20, and C++23 and
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// later, respectively. v1 is inline for standards before C++20, and v2 is
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// inline for C++20 and later. Note that this only applies to code for which
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// multiple vI namespace alternatives exist. For example, some instances of
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// the v1 namespace may still be inline, if there is no v2 version of its
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// contents.
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#if !BOOST_STL_INTERFACES_USE_CONCEPTS && !BOOST_STL_INTERFACES_USE_DEDUCED_THIS
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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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# define BOOST_STL_INTERFACES_NAMESPACE_V3 namespace v3
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#elif BOOST_STL_INTERFACES_USE_CONCEPTS && !BOOST_STL_INTERFACES_USE_DEDUCED_THIS
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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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# define BOOST_STL_INTERFACES_NAMESPACE_V3 namespace v3
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#else
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# define BOOST_STL_INTERFACES_NAMESPACE_V1 namespace v1
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# define BOOST_STL_INTERFACES_NAMESPACE_V2 namespace v2
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# define BOOST_STL_INTERFACES_NAMESPACE_V3 inline namespace v3
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#endif
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#endif
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