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