Rust NonZeroUsize.unchecked_mul用法及代码示例

用法

pub const unsafe fn unchecked_mul(self, other: NonZeroUsize) -> NonZeroUsize

将两个非零整数相乘，假设不会发生溢出。溢出是未检查的，溢出是未定义的行为即使结果将换行为非零值。该行为一旦定义为未定义self * rhs > usize::MAX.

例子

#![feature(nonzero_ops)]

let two = NonZeroUsize::new(2)?;
let four = NonZeroUsize::new(4)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });