Is it possible to extend a default method implementation of a trait in a struct?

Question

In traditional object-oriented languages (e.g. Java), it is possible to \"extend\" the functionality of a method in an inherited class by calling the original method from th

Answer 1

Another way of accomplishing this would be to place the overriding method in impl block of struct

trait A {
    fn a(&self) {
        println!("trait default method");
    }
}

struct B;

impl B {
    fn a(&self) {
        println!("overridden method");
        // call default method here
        A::a(self);
    }
}

impl A for B {}

fn main() {
    let a = B;
    a.a();
} 

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