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Rahix/main.rs

Last active December 29, 2018 13:05
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Static and Dynamic Dispatch at the same time
Raw
main.rs
trait Foo {
fn bar(&self);
}
impl Foo for &dyn Foo {
fn bar(&self) {
(*self).bar();
}
}
struct Bar;
impl Foo for Bar {
fn bar(&self) {
println!("Hello");
}
}
fn foo<T: Foo>(f: &T) {
f.bar();
}
fn baz(f: &dyn Foo) {
foo(&f)
}
fn main() {
let b = Bar;
foo(&b);
baz(&b);
}
@Rahix
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Rahix commented Dec 29, 2018

Actually this is better:

trait Foo {
    fn bar(&self);
}

impl Foo for &dyn Foo {
    fn bar(&self) {
        (*self).bar();
    }
}

struct Bar;

impl Foo for Bar {
    fn bar(&self) {
        println!("Hello");
    }
}

fn foo<T: Foo>(f: &T) {
    f.bar();
}

fn baz(f: &dyn Foo) {
    foo(&f)
}

fn main() {
    let b = Bar;
    
    foo(&b);
    baz(&b);
}

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