What version of C++ is in the current version?

[Tonaion02]

I want to ask how many version of C++ are currently available in this version.

[mstorsjo]

I tried to add the argument -std=C++20 and the compiler doesn't recognize it.

If using such an option, it should be -std=c++20 with a lowercase C

I want to ask how many version of C++ are currently available in this version.

See https://clang.llvm.org/cxx_status.html and https://clang.llvm.org/cxx_status.html.

[longnguyen2004]

The above user is a bot, please don't care about them :)