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|
// run-pass
#![feature(trait_upcasting)]
#![allow(incomplete_features)]
trait Foo: PartialEq<i32> + std::fmt::Debug + Send + Sync {
fn a(&self) -> i32 {
10
}
fn z(&self) -> i32 {
11
}
fn y(&self) -> i32 {
12
}
}
trait Bar: Foo {
fn b(&self) -> i32 {
20
}
fn w(&self) -> i32 {
21
}
}
trait Baz: Bar {
fn c(&self) -> i32 {
30
}
}
impl Foo for i32 {
fn a(&self) -> i32 {
100
}
}
impl Bar for i32 {
fn b(&self) -> i32 {
200
}
}
impl Baz for i32 {
fn c(&self) -> i32 {
300
}
}
fn main() {
let baz: &dyn Baz = &1;
let _: &dyn std::fmt::Debug = baz;
assert_eq!(*baz, 1);
assert_eq!(baz.a(), 100);
assert_eq!(baz.b(), 200);
assert_eq!(baz.c(), 300);
assert_eq!(baz.z(), 11);
assert_eq!(baz.y(), 12);
assert_eq!(baz.w(), 21);
let bar: &dyn Bar = baz;
let _: &dyn std::fmt::Debug = bar;
assert_eq!(*bar, 1);
assert_eq!(bar.a(), 100);
assert_eq!(bar.b(), 200);
assert_eq!(bar.z(), 11);
assert_eq!(bar.y(), 12);
assert_eq!(bar.w(), 21);
let foo: &dyn Foo = baz;
let _: &dyn std::fmt::Debug = foo;
assert_eq!(*foo, 1);
assert_eq!(foo.a(), 100);
assert_eq!(foo.z(), 11);
assert_eq!(foo.y(), 12);
let foo: &dyn Foo = bar;
let _: &dyn std::fmt::Debug = foo;
assert_eq!(*foo, 1);
assert_eq!(foo.a(), 100);
assert_eq!(foo.z(), 11);
assert_eq!(foo.y(), 12);
}
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