i set it to c++20 on purpose, i just didn't know the feature existed (and didn't know that my clang didn't support that feature; i'm a little uncertain as to whether my clang is an outdated version without full c++20 support, or whether gcc is implementing a proposed extension that didn't actually make it in)
Yeah, I think gcc has a std c++20 mode as well as a with extensions mode. And adding `-pedantic` helps because it forces extensions (unless specified in the std type) and non-conformant code to be rejected.
And that clang likely just didn't have full c++20 support. Which tbf I actually don't think any clang has full c++20 support currently as even bleeding edge clang still is missing a few things in the lang and library departments.
