52 lines
1.1 KiB
Rust
52 lines
1.1 KiB
Rust
|
#![feature(trait_upcasting)]
|
||
|
|
|
||
|
|
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 bar: &dyn Bar = baz;
|
||
|
|
bar.c();
|
||
|
|
//~^ ERROR no method named `c` found for reference `&dyn Bar` in the current scope [E0599]
|
||
|
|
|
||
|
|
let foo: &dyn Foo = baz;
|
||
|
|
foo.b();
|
||
|
|
//~^ ERROR no method named `b` found for reference `&dyn Foo` in the current scope [E0599]
|
||
|
|
foo.c();
|
||
|
|
//~^ ERROR no method named `c` found for reference `&dyn Foo` in the current scope [E0599]
|
||
|
|
|
||
|
|
let foo: &dyn Foo = bar;
|
||
|
|
foo.b();
|
||
|
|
//~^ ERROR no method named `b` found for reference `&dyn Foo` in the current scope [E0599]
|
||
|
|
foo.c();
|
||
|
|
//~^ ERROR no method named `c` found for reference `&dyn Foo` in the current scope [E0599]
|
||
|
|
}
|