Function std::intrinsics::unchecked_shl

pub const unsafe extern "rust-intrinsic" fn unchecked_shl<T>(x: T, y: T) -> T where    T: Copy, 

Performs an unchecked left shift, resulting in undefined behavior when y < 0 or y >= N, where N is the width of T in bits.

Safe wrappers for this intrinsic are available on the integer primitives via the checked_shl method. For example, u32::checked_shl