| 1 | // |
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| 2 | // Copyright (c) 2022-2023 Alexander Grund |
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| 3 | // |
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| 4 | // Distributed under the Boost Software License, Version 1.0. |
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| 5 | // https://www.boost.org/LICENSE_1_0.txt |
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| 6 | |
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| 7 | #ifndef BOOST_LOCALE_DETAIL_FACET_ID_HPP_INCLUDED |
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| 8 | #define BOOST_LOCALE_DETAIL_FACET_ID_HPP_INCLUDED |
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| 9 | |
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| 10 | #include <boost/locale/config.hpp> |
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| 11 | #include <locale> |
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| 12 | |
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| 13 | /// \cond INTERNAL |
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| 14 | namespace boost { namespace locale { namespace detail { |
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| 15 | #if BOOST_CLANG_VERSION >= 40900 |
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| 16 | # pragma clang diagnostic push |
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| 17 | # pragma clang diagnostic ignored "-Wundefined-var-template" |
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| 18 | #endif |
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| 19 | /// CRTP base class to hold the id required for facets |
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| 20 | /// |
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| 21 | /// Required because the id needs to be defined in a CPP file and hence ex/imported for shared libraries. |
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| 22 | /// However the virtual classes need to be declared as BOOST_VISIBLE to combine the VTables because otherwise |
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| 23 | /// casts/virtual-calls might be flagged as invalid by UBSAN |
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| 24 | template<class Derived> |
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| 25 | struct BOOST_LOCALE_DECL facet_id { |
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| 26 | static std::locale::id id; |
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| 27 | }; |
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| 28 | #if BOOST_CLANG_VERSION >= 40900 |
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| 29 | # pragma clang diagnostic pop |
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| 30 | #endif |
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| 31 | }}} // namespace boost::locale::detail |
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| 32 | |
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| 33 | /// \endcond |
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| 34 | |
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| 35 | #endif |
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| 36 | |
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