# Function core::intrinsics::ctlz_nonzero[−][src]

    pub unsafe extern "rust-intrinsic" fn ctlz_nonzero<T: Copy>(x: T) -> T

🔬 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

Like `ctlz`, but extra-unsafe as it returns `undef` when given an `x` with value `0`.

This intrinsic does not have a stable counterpart.

# Examples

    #![feature(core_intrinsics)]

    use std::intrinsics::ctlz_nonzero;

    let x = 0b0001_1100_u8;
    let num_leading = unsafe { ctlz_nonzero(x) };
    assert_eq!(num_leading, 3);

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