rust/tests/ui/unboxed-closures/unboxed-closures-call-fn-autoderef.rs
2024-02-16 20:02:50 +00:00

19 lines
406 B
Rust

//@ run-pass
#![allow(unused_imports)]
// Test that the call operator autoderefs when calling a bounded type parameter.
use std::ops::FnMut;
fn call_with_2(x: &fn(isize) -> isize) -> isize
{
x(2) // look ma, no `*`
}
fn subtract_22(x: isize) -> isize { x - 22 }
pub fn main() {
let subtract_22: fn(isize) -> isize = subtract_22;
let z = call_with_2(&subtract_22);
assert_eq!(z, -20);
}