Just having a comptime unreachable feature seems pretty cool. Common C++ compilers have the worst version of this with __builtin_unreachable() -- they don't do

Just having a comptime unreachable feature seems pretty cool. Common C++ compilers have the worst version of this with __builtin_unreachable() -- they don't do any verification the site is unreachable, and just let the optimizer go to town. (I use/recommend runtime assert/fatal/abort over that behavior most days of the week.)