Implement `NonZero::from_str_radix`

libs
1

NonZero::<T>::from_str is already implemented. This only supports decimal, just like integer_type::from_str.

For example, to convert a string which represents a hexadecimal number, we need to do something like this:

let n = NonZeroU8::new(u8::from_str_radix("ff", 16)?).unwrap();

I think it would be useful to be able to write this to something like this:

let n = NonZeroU8::from_str_radix("ff", 16).unwrap();

Also, unlike the first example, I think this example can return IntErrorKind::Zero.

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