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’; 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.

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Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/intrinsics/fn.discriminant_value.html