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Older libsc++ versions have incomplete <span>.

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jzmaddock
2021-03-05 12:59:22 +00:00
parent b5b3482a58
commit 23de20c230
1 changed files with 5 additions and 0 deletions
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5
include/boost/config/stdlib/libcpp.hpp
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@ -158,6 +158,11 @@
# define BOOST_NO_CXX20_HDR_SEMAPHORE
#endif
# if(_LIBCPP_VERSION < 9000) && !defined(BOOST_NO_CXX20_HDR_SOURCE_SPAN)
// as_writable_bytes is missing.
# define BOOST_NO_CXX20_HDR_SOURCE_SPAN
#endif
#else
#define BOOST_NO_CXX17_STD_INVOKE // Invoke support is incomplete (no invoke_result)
#define BOOST_NO_CXX17_HDR_EXECUTION