| 1 | // Copyright (C) 2020 T. Zachary Laine |
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| 2 | // |
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| 3 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 4 | // accompanying file LICENSE_1_0.txt or copy at |
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| 5 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 6 | #ifndef BOOST_STL_INTERFACES_CONFIG_HPP |
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| 7 | #define BOOST_STL_INTERFACES_CONFIG_HPP |
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| 8 | |
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| 9 | // Included for definition of __cpp_lib_concepts. |
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| 10 | #include <iterator> |
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| 11 | |
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| 12 | |
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| 13 | #if defined(__cpp_lib_concepts) && defined(__cpp_lib_ranges) && \ |
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| 14 | !defined(BOOST_STL_INTERFACES_DISABLE_CONCEPTS) |
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| 15 | #define BOOST_STL_INTERFACES_USE_CONCEPTS 1 |
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| 16 | #else |
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| 17 | #define BOOST_STL_INTERFACES_USE_CONCEPTS 0 |
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| 18 | #endif |
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| 19 | |
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| 20 | #if defined(__cpp_explicit_this_parameter) && \ |
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| 21 | BOOST_STL_INTERFACES_USE_CONCEPTS && \ |
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| 22 | !defined(BOOST_STL_INTERFACES_DISABLE_DEDUCED_THIS) |
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| 23 | #define BOOST_STL_INTERFACES_USE_DEDUCED_THIS 1 |
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| 24 | #else |
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| 25 | #define BOOST_STL_INTERFACES_USE_DEDUCED_THIS 0 |
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| 26 | #endif |
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| 27 | |
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| 28 | // The inline namespaces v1, v2, and v3 represent C++14, C++20, and C++23 and |
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| 29 | // later, respectively. v1 is inline for standards before C++20, and v2 is |
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| 30 | // inline for C++20 and later. Note that this only applies to code for which |
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| 31 | // multiple vI namespace alternatives exist. For example, some instances of |
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| 32 | // the v1 namespace may still be inline, if there is no v2 version of its |
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| 33 | // contents. |
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| 34 | #if !BOOST_STL_INTERFACES_USE_CONCEPTS && !BOOST_STL_INTERFACES_USE_DEDUCED_THIS |
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| 35 | # define BOOST_STL_INTERFACES_NAMESPACE_V1 inline namespace v1 |
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| 36 | # define BOOST_STL_INTERFACES_NAMESPACE_V2 namespace v2 |
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| 37 | # define BOOST_STL_INTERFACES_NAMESPACE_V3 namespace v3 |
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| 38 | #elif BOOST_STL_INTERFACES_USE_CONCEPTS && !BOOST_STL_INTERFACES_USE_DEDUCED_THIS |
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| 39 | # define BOOST_STL_INTERFACES_NAMESPACE_V1 namespace v1 |
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| 40 | # define BOOST_STL_INTERFACES_NAMESPACE_V2 inline namespace v2 |
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| 41 | # define BOOST_STL_INTERFACES_NAMESPACE_V3 namespace v3 |
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| 42 | #else |
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| 43 | # define BOOST_STL_INTERFACES_NAMESPACE_V1 namespace v1 |
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| 44 | # define BOOST_STL_INTERFACES_NAMESPACE_V2 namespace v2 |
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| 45 | # define BOOST_STL_INTERFACES_NAMESPACE_V3 inline namespace v3 |
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| 46 | #endif |
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| 47 | |
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| 48 | #endif |
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| 49 | |
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