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

27 lines
603 B
Rust

//@ run-pass
// Test that unboxed closures in contexts with free type parameters
// monomorphize correctly (issue #16791)
fn main(){
fn bar<'a, T:Clone+'a> (t: T) -> Box<dyn FnMut()->T + 'a> {
Box::new(move || t.clone())
}
let mut f = bar(42_u32);
assert_eq!(f(), 42);
let mut f = bar("forty-two");
assert_eq!(f(), "forty-two");
let x = 42_u32;
let mut f = bar(&x);
assert_eq!(f(), &x);
#[derive(Clone, Copy, Debug, PartialEq)]
struct Foo(usize, &'static str);
let x = Foo(42, "forty-two");
let mut f = bar(x);
assert_eq!(f(), x);
}