36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
//
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// Copyright (c) 2022-2023 Alexander Grund
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//
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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#ifndef BOOST_LOCALE_DETAIL_FACET_ID_HPP_INCLUDED
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#define BOOST_LOCALE_DETAIL_FACET_ID_HPP_INCLUDED
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#include <boost/locale/config.hpp>
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#include <locale>
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/// \cond INTERNAL
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namespace boost { namespace locale { namespace detail {
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#if BOOST_CLANG_VERSION >= 40900
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# pragma clang diagnostic push
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# pragma clang diagnostic ignored "-Wundefined-var-template"
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#endif
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/// CRTP base class to hold the id required for facets
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///
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/// Required because the id needs to be defined in a CPP file and hence ex/imported for shared libraries.
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/// However the virtual classes need to be declared as BOOST_VISIBLE to combine the VTables because otherwise
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/// casts/virtual-calls might be flagged as invalid by UBSAN
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template<class Derived>
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struct BOOST_LOCALE_DECL facet_id {
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static std::locale::id id;
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};
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#if BOOST_CLANG_VERSION >= 40900
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# pragma clang diagnostic pop
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#endif
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}}} // namespace boost::locale::detail
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/// \endcond
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#endif
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