3 // FIXME: uncomment let binding types below when `impl_trait_in_bindings` feature is fixed.
5 #![feature(associated_type_bounds)]
9 trait Tr1 { type As1; fn mk(&self) -> Self::As1; }
10 trait Tr2<'a> { fn tr2(self) -> &'a Self; }
12 fn assert_copy<T: Copy>(x: T) { let _x = x; let _x = x; }
13 fn assert_static<T: 'static>(_: T) {}
14 fn assert_forall_tr2<T: for<'a> Tr2<'a>>(_: T) {}
17 #[derive(Copy, Clone)]
19 impl Tr1 for S1 { type As1 = S2; fn mk(&self) -> Self::As1 { S2 } }
21 fn def_et1() -> Box<dyn Tr1<As1: Copy>> {
22 let x /* : Box<dyn Tr1<As1: Copy>> */ = Box::new(S1);
25 pub fn use_et1() { assert_copy(def_et1().mk()); }
27 fn def_et2() -> Box<dyn Tr1<As1: Send + 'static>> {
28 let x /* : Box<dyn Tr1<As1: Send + 'static>> */ = Box::new(S1);
31 pub fn use_et2() { assert_static(def_et2().mk()); }
33 fn def_et3() -> Box<dyn Tr1<As1: Clone + Iterator<Item: Add<u8, Output: Into<u8>>>>> {
36 type As1 = core::ops::Range<u8>;
37 fn mk(&self) -> Self::As1 { 0..10 }
39 let x /* : Box<dyn Tr1<As1: Clone + Iterator<Item: Add<u8, Output: Into<u8>>>>> */
44 let _0 = def_et3().mk().clone();
50 assert_eq!(s, (0..10).map(|x| x + 1).sum());
53 fn def_et4() -> Box<dyn Tr1<As1: for<'a> Tr2<'a>>> {
54 #[derive(Copy, Clone)]
58 fn mk(&self) -> A { A }
60 impl<'a> Tr2<'a> for A {
61 fn tr2(self) -> &'a Self { &A }
63 let x /* : Box<dyn Tr1<As1: for<'a> Tr2<'a>>> */ = Box::new(A);
66 pub fn use_et4() { assert_forall_tr2(def_et4().mk()); }