rust/tests/ui/functions-closures/copy-closure.rs
2024-02-16 20:02:50 +00:00

17 lines
309 B
Rust

//@ run-pass
// Check that closures implement `Copy`.
fn call<T, F: FnOnce() -> T>(f: F) -> T { f() }
fn main() {
let a = 5;
let hello = || {
println!("Hello {}", a);
a
};
assert_eq!(5, call(hello.clone()));
assert_eq!(5, call(hello));
assert_eq!(5, call(hello));
}