rust/tests/ui/feature-gates/feature-gate-unboxed-closures.rs
2023-01-11 09:32:08 +00:00

19 lines
450 B
Rust

#![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);
}