# [−][src]Function std::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

Returns the value of the discriminant for the variant in 'v', cast to a `u64`; if `T` has no discriminant, returns `0`.

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