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Fix string_view include on gcc 7.2

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If it's included in anything earlier than c++-1z it errors.
This commit is contained in:
Daniel James
2018-01-20 21:53:36 +00:00
parent b5c3b5d00a
commit 5c4edf4d7d
1 changed files with 2 additions and 4 deletions
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4
include/boost/container_hash/hash/hash.hpp
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@@ -69,13 +69,11 @@
# define BOOST_HASH_HAS_STRING_VIEW 1 # define BOOST_HASH_HAS_STRING_VIEW 1
# include <string_view> # include <string_view>
# endif # endif
# else # elif defined(__cplusplus) && __cplusplus >= 201703
# include <string_view> # include <string_view>
# if defined(__cpp_lib_string_view) && __cpp_lib_string_view >= 201603
# define BOOST_HASH_HAS_STRING_VIEW 1 # define BOOST_HASH_HAS_STRING_VIEW 1
# endif # endif
# endif # endif
# endif
#endif #endif
#if !defined(BOOST_HASH_HAS_STRING_VIEW) #if !defined(BOOST_HASH_HAS_STRING_VIEW)