Add some support for C++17-23

[VReaperV]

Add CPPStandard.h for checking C++ features support by version, replace deprecated std::result_of on >= C++17. Use the /Zc:__cplusplus for MSVC CI so it will get the correct version in CPPStandard.

[illwieckz]

Did we lost it or do we set it too late to be useful?

• 7a6863a — cmake: tell MSVC to properly report __cplusplus

From:

• cmake: add USE_ARCH_INTRINSICS and USE_COMPILER_INTRINSICS CMake options #1149

[VReaperV]

I think the CI's not picking it up for some reason.

[illwieckz]

We may name them like DAEMON_CPP_23_FEATURES like we do with other Dæmon-specific defines.

[slipher]

What do we need from C++20 or C++23?

[VReaperV]

What do we need from C++20 or C++23?

Daemon-vulkan currently specifically uses designated initializers, concepts, <source_location>, atomic wait/notify, and <stacktrace> from there. Additionally, <source_location> and <stacktrace> are used for better logging of various issues, with extra information being added automatically if a cvar is enabled. That part is not specific to daemon-vulkan and can be used throughout the engine and cgame/sgame (the latter 2 only with dll/native exe ofc).

[slipher]

Commit message should be updated

[slipher]

LGTM