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Disable the use of [[msvc::no_unique_address]] on versions prior to 1943… #557

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Disable the use of [[msvc::no_unique_address]] on versions prior to 1943… #557

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6 changes: 4 additions & 2 deletions include/boost/config/compiler/visualc.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -273,8 +273,10 @@
#define BOOST_NO_CXX17_AUTO_NONTYPE_TEMPLATE_PARAMS
#endif

#if _MSC_FULL_VER >= 192829913
// Works with /std:c++14 and /std:c++17, and performs optimization
#if _MSC_VER >= 1943
// Even though [[msvc::no_unique_address]] works on earlier versions,
// it issues a warning with /std:c++14 and /std:c++17, which is a problem
// https://github.com/boostorg/config/issues/499
#define BOOST_ATTRIBUTE_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
#endif

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