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fix bug of C++ feature detection(#338)

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This commit is contained in:
Jinhao
2018-09-25 02:07:15 +08:00
parent 7fea766f99
commit 2c3d75c709
2 changed files with 4 additions and 4 deletions
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6
include/nana/c++defines.hpp
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@@ -211,10 +211,10 @@
#undef _nana_std_optional
#if ((defined(_MSC_VER) && (_MSC_VER >= 1912) && ((!defined(_MSVC_LANG)) || _MSVC_LANG < 201703))) || \
((__cplusplus < 201703L) || \
#if ((defined(_MSC_VER) && ((!defined(_MSVC_LANG)) || _MSVC_LANG < 201703))) || \
((!defined(_MSC_VER)) && ((__cplusplus < 201703L) || \
(defined(__clang__) && (__clang_major__ * 100 + __clang_minor__ < 400)) || \
(!defined(__clang__) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 701)) \
(!defined(__clang__) && defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 701))) \
)
# define _nana_std_optional
#endif