add detection of C++17 folding experssion

2017-12-20 01:28:05 +08:00 · 2017-12-20 01:28:05 +08:00 · 9d75d15474
commit 9d75d15474
parent 5f77c73aaa
1 changed files with 1 additions and 0 deletions
--- a/include/nana/c++defines.hpp
+++ b/include/nana/c++defines.hpp
@ -202,6 +202,7 @@
 #undef _nana_cxx_constexpr_if
 #if (defined(_MSC_VER) && (_MSC_VER >= 1912) && defined(_MSVC_LANG) && _MSVC_LANG>= 201703)
 #	define _nana_cxx_constexpr_if
+#	define _nana_cxx_folding_expression
 #endif