rust/tests/ui/unboxed-closures/unboxed-closures-prelude.rs

19 lines
383 B
Rust

//@ run-pass
// Tests that the re-exports of `FnOnce` et al from the prelude work.
//@ pretty-expanded FIXME #23616
fn main() {
let task: Box<dyn Fn(isize) -> isize> = Box::new(|x| x);
task(0);
let mut task: Box<dyn FnMut(isize) -> isize> = Box::new(|x| x);
task(0);
call(|x| x, 22);
}
fn call<F:FnOnce(isize) -> isize>(f: F, x: isize) -> isize {
f(x)
}