Trait std::string::ToString  1.0.0
                   
                       [−]
                   
               [src]
pub trait ToString {
    fn to_string(&self) -> String;
}A trait for converting a value to a String.
This trait is automatically implemented for any type which implements the
Display trait. As such, ToString shouldn't be implemented directly:
Display should be implemented instead, and you get the ToString
implementation for free.