| // run-pass |
| // Test equality constrai32s on associated types in a where clause. |
| |
| |
| pub trait ToI32 { |
| fn to_i32(&self) -> i32; |
| } |
| |
| impl ToI32 for i32 { |
| fn to_i32(&self) -> i32 { *self } |
| } |
| |
| impl ToI32 for u32 { |
| fn to_i32(&self) -> i32 { *self as i32 } |
| } |
| |
| pub trait GetToI32 |
| { |
| type R : ToI32; |
| |
| fn get(&self) -> <Self as GetToI32>::R; |
| } |
| |
| impl GetToI32 for i32 { |
| type R = i32; |
| fn get(&self) -> i32 { *self } |
| } |
| |
| impl GetToI32 for u32 { |
| type R = u32; |
| fn get(&self) -> u32 { *self } |
| } |
| |
| fn foo<G>(g: G) -> i32 |
| where G : GetToI32 |
| { |
| ToI32::to_i32(&g.get()) |
| } |
| |
| pub fn main() { |
| assert_eq!(foo(22i32), 22); |
| assert_eq!(foo(22u32), 22); |
| } |