Function core::intrinsics::discriminant_value

pub extern "rust-intrinsic" fn discriminant_value<T>(
    v: &T
) -> <T as DiscriminantKind>::Discriminant

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

intrinsics are unlikely to ever be stabilized, instead they should be used through stabilized interfaces in the rest of the standard library

This is supported on non-crate feature miri-test-libstd or test or doctest only.

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.