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the code snippets used have c++17 and c++20 features, my clion only supports up to c++14 with very limited c++17 support, not to mention c++20.

clang++ does have good c++17 support but g++ only supports full set of c++14



Which g++ are you talking about? g++-8 defaults to C++17. g++-9 supports many C++20 features.


using default g++7 on ubuntu 18.04, but you're correct that 8/9 has c++17/c++2a support, i need upgrade my toolchain now




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