rust/tests/ui/coercion/unsafe-coercion.rs
2024-02-16 20:02:50 +00:00

18 lines
276 B
Rust

//@ run-pass
// Check that safe fns are not a subtype of unsafe fns.
fn foo(x: i32) -> i32 {
x * 22
}
fn bar(x: fn(i32) -> i32) -> unsafe fn(i32) -> i32 {
x // OK, coercion!
}
fn main() {
let f = bar(foo);
let x = unsafe { f(2) };
assert_eq!(x, 44);
}