mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 23:34:48 +00:00
22 lines
308 B
Rust
22 lines
308 B
Rust
//@ check-pass
|
|
|
|
union URes<R: Copy> {
|
|
uninit: (),
|
|
init: R,
|
|
}
|
|
|
|
struct Params<F, R: Copy> {
|
|
function: F,
|
|
result: URes<R>,
|
|
}
|
|
|
|
unsafe extern "C" fn do_call<F, R>(params: *mut Params<F, R>)
|
|
where
|
|
R: Copy,
|
|
F: Fn() -> R,
|
|
{
|
|
(*params).result.init = ((*params).function)();
|
|
}
|
|
|
|
fn main() {}
|