# Function std::intrinsics::discriminant_value

const: 1.75.0 · source ·

    pub const 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`.