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Use [[msvc::no_unique_address]] under clang-cl, matching msvc #560

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Use [[msvc::no_unique_address]] under clang-cl, matching msvc #560

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8 changes: 8 additions & 0 deletions include/boost/config/compiler/clang.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -365,6 +365,14 @@
# define BOOST_MAY_ALIAS __attribute__((__may_alias__))
#endif

#if defined(_MSC_VER) && _MSC_VER >= 1930
// In MSVC mode, [[no_unique_address]] is a no-op, matching MSVC,
// but [[msvc::no_unique_address]] works
// The condition here must match the one in visualc.hpp, to preserve
// the ABI compatibility between MSVC and Clang
#define BOOST_ATTRIBUTE_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
#endif

#ifndef BOOST_COMPILER
# define BOOST_COMPILER "Clang version " __clang_version__
#endif
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