#![feature(fn_traits)] | |
struct Test; | |
impl FnOnce<(u32, u32)> for Test { | |
//~^ ERROR the precise format of `Fn`-family traits' type parameters is subject to change | |
//~| ERROR manual implementations of `FnOnce` are experimental | |
type Output = u32; | |
extern "rust-call" fn call_once(self, (a, b): (u32, u32)) -> u32 { | |
a + b | |
} | |
//~^^^ ERROR rust-call ABI is subject to change | |
} | |
fn main() { | |
assert_eq!(Test(1u32, 2u32), 3u32); | |
} |