I want to use from_str_radix() in a generic function.

This function is implemented in a macro.

I successfully use the bound T: std::str::FromStr to give me str::parse::<T> but I do not know how to find out which trait from_str_radix() belongs to.

What is the method, for finding out which trait an arbitrary function (implemented across many integer types) belongs to?

CodePudding user response：

It does not belong to any trait.

If you need it in a trait for a generic bound, you can use num_traits::Num.