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#![feature(trait_upcasting)]
trait Foo {
fn a(&self) -> i32 {
10
}
fn z(&self) -> i32 {
11
}
fn y(&self) -> i32 {
12
}
}
trait Bar {
fn b(&self) -> i32 {
20
}
fn w(&self) -> i32 {
21
}
}
trait Baz {
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;
//~^ ERROR mismatched types [E0308]
let _: &dyn Send = baz;
//~^ ERROR mismatched types [E0308]
let _: &dyn Sync = baz;
//~^ ERROR mismatched types [E0308]
let bar: &dyn Bar = baz;
//~^ ERROR mismatched types [E0308]
let _: &dyn std::fmt::Debug = bar;
//~^ ERROR mismatched types [E0308]
let _: &dyn Send = bar;
//~^ ERROR mismatched types [E0308]
let _: &dyn Sync = bar;
//~^ ERROR mismatched types [E0308]
let foo: &dyn Foo = baz;
//~^ ERROR mismatched types [E0308]
let _: &dyn std::fmt::Debug = foo;
//~^ ERROR mismatched types [E0308]
let _: &dyn Send = foo;
//~^ ERROR mismatched types [E0308]
let _: &dyn Sync = foo;
//~^ ERROR mismatched types [E0308]
let foo: &dyn Foo = bar;
//~^ ERROR mismatched types [E0308]
let _: &dyn std::fmt::Debug = foo;
//~^ ERROR mismatched types [E0308]
let _: &dyn Send = foo;
//~^ ERROR mismatched types [E0308]
let _: &dyn Sync = foo;
//~^ ERROR mismatched types [E0308]
}
|
