mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 07:14:28 +00:00
42 lines
629 B
Rust
42 lines
629 B
Rust
//@ run-pass
|
|
// Test calling methods on an impl for a bare trait.
|
|
|
|
//@ aux-build:traitimpl.rs
|
|
|
|
extern crate traitimpl;
|
|
use traitimpl::Bar;
|
|
|
|
static mut COUNT: usize = 1;
|
|
|
|
trait T {
|
|
fn t(&self) {} //~ WARN method `t` is never used
|
|
}
|
|
|
|
impl<'a> dyn T+'a {
|
|
fn foo(&self) {
|
|
unsafe { COUNT *= 2; }
|
|
}
|
|
fn bar() {
|
|
unsafe { COUNT *= 3; }
|
|
}
|
|
}
|
|
|
|
impl T for isize {}
|
|
|
|
struct Foo;
|
|
impl<'a> Bar<'a> for Foo {}
|
|
|
|
fn main() {
|
|
let x: &dyn T = &42;
|
|
|
|
x.foo();
|
|
<dyn T>::foo(x);
|
|
<dyn T>::bar();
|
|
|
|
unsafe { assert_eq!(COUNT, 12); }
|
|
|
|
// Cross-crait case
|
|
let x: &dyn Bar = &Foo;
|
|
x.bar();
|
|
}
|