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trait Foo {
fn method(&self) -> String;
}
struct S1 {
a: u8,
}
struct S2 {
a: String,
}
impl Foo for S1 {
fn method(&self) -> String { format!("u8: {}", self.a) }
}
impl Foo for S2 {
fn method(&self) -> String { format!("string: {}", self.a) }
}
fn do_something(x: &Box<dyn Foo>) {
println!("{}",x.method());
}
fn main() {
//let x = &S1{a:5u8};
//let y = &S2{a:"Hello".to_string()};
let list_of_foo:Vec<Box<dyn Foo>> = vec![
Box::new(S1{a:5u8}),
Box::new(S2{a:"Hello".to_string()})];
for i in list_of_foo.iter() {
do_something(i);
}
println!("Hello, world!");
}
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