generic_const_args: allow paths to non type consts
tracking issue: https://github.com/rust-lang/rust/issues/151972
Non type consts should be usable in the type system in `feature(generic_const_args)`. These are directly plugged into the constant evaluator, unlike type consts, which are attempted to be reasoned about by the type system.
Inherent associated constants are not supported at this time, due to complications around how generic arguments are represented for them (it's currently a mess). The mess is being cleaned up (e.g. https://github.com/rust-lang/rust/pull/154758), so instead of trying to hack support in before the refactoring is done, let's just wait to be able to implement it more cleanly.
r? @BoxyUwU
Jacob Pratt
b2cc990df0