| // Test that impl trait does not allow creating recursive types that are |
| // otherwise forbidden. |
| |
| #![feature(generators)] |
| |
| fn option(i: i32) -> impl Sized { //~ ERROR |
| if i < 0 { |
| None |
| } else { |
| Some((option(i - 1), i)) |
| } |
| } |
| |
| fn tuple() -> impl Sized { //~ ERROR |
| (tuple(),) |
| } |
| |
| fn array() -> impl Sized { //~ ERROR |
| [array()] |
| } |
| |
| fn ptr() -> impl Sized { //~ ERROR |
| &ptr() as *const _ |
| } |
| |
| fn fn_ptr() -> impl Sized { //~ ERROR |
| fn_ptr as fn() -> _ |
| } |
| |
| fn closure_capture() -> impl Sized { //~ ERROR |
| let x = closure_capture(); |
| move || { x; } |
| } |
| |
| fn closure_ref_capture() -> impl Sized { //~ ERROR |
| let x = closure_ref_capture(); |
| move || { &x; } |
| } |
| |
| fn closure_sig() -> impl Sized { //~ ERROR |
| || closure_sig() |
| } |
| |
| fn generator_sig() -> impl Sized { //~ ERROR |
| || generator_sig() |
| } |
| |
| fn generator_capture() -> impl Sized { //~ ERROR |
| let x = generator_capture(); |
| move || { yield; x; } |
| } |
| |
| fn substs_change<T>() -> impl Sized { //~ ERROR |
| (substs_change::<&T>(),) |
| } |
| |
| fn generator_hold() -> impl Sized { //~ ERROR |
| move || { |
| let x = generator_hold(); |
| yield; |
| x; |
| } |
| } |
| |
| fn use_fn_ptr() -> impl Sized { // OK, error already reported |
| fn_ptr() |
| } |
| |
| fn mutual_recursion() -> impl Sync { //~ ERROR |
| mutual_recursion_b() |
| } |
| |
| fn mutual_recursion_b() -> impl Sized { //~ ERROR |
| mutual_recursion() |
| } |
| |
| fn main() {} |