Function discriminant_value 

pub const fn discriminant_value<T>(
    v: &T,
) -> <T as DiscriminantKind>::Discriminant

🔬This is a nightly-only experimental API. (core_intrinsics)

This item is validated for IEC 61508 (SIL 2) and ISO 26262 (ASIL B).

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.