Watal M. Iwasaki 5ccdaf643f Remove C++17 extension warning from clang; #1535 ... - Switch off `nodiscard` for clang unless C++17 is detected. - Detect C++ standard before the switch.		2019-03-28 14:38:58 +09:00
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nlohmann	Remove C++17 extension warning from clang; #1535	2019-03-28 14:38:58 +09:00