pub extern "rust-intrinsic" fn discriminant_value<T>(
    v: &T
) -> <T as DiscriminantKind>::Discriminant
🔬 This is a nightly-only experimental API. (core_intrinsics)
Expand description

Returns the value of the discriminant for the variant in ‘v’; if T has no discriminant, returns 0.

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 stabilized version of this intrinsic is core::mem::discriminant.