pub const fn variant_count<T>() -> usize🔬This is a nightly-only experimental API. (
core_intrinsics)Expand description
Returns the number of variants of the type T cast to a usize;
if T has no variants, returns 0. Uninhabited variants will be counted.
Note that, unlike most intrinsics, this is safe to call;
it does not require an unsafe block.
Therefore, implementations must not require the user to uphold
any safety invariants.
The to-be-stabilized version of this intrinsic is crate::mem::variant_count.