| // Test that the types of distinct fn items are not compatible by |
| // default. See also `run-pass/fn-item-type-*.rs`. |
| |
| fn foo<T>(x: isize) -> isize { |
| x * 2 |
| } |
| fn bar<T>(x: isize) -> isize { |
| x * 4 |
| } |
| |
| fn eq<T>(x: T, y: T) {} |
| |
| trait Foo { |
| fn foo() { /* this is a default fn */ |
| } |
| } |
| impl<T> Foo for T { |
| /* `foo` is still default here */ |
| } |
| |
| fn main() { |
| eq(foo::<u8>, bar::<u8>); |
| //~^ ERROR mismatched types |
| //~| expected fn item `fn(_) -> _ {foo::<u8>}` |
| //~| found fn item `fn(_) -> _ {bar::<u8>}` |
| //~| expected fn item, found a different fn item |
| //~| different fn items have unique types, even if their signatures are the same |
| |
| eq(foo::<u8>, foo::<i8>); |
| //~^ ERROR mismatched types |
| //~| expected `u8`, found `i8` |
| //~| different fn items have unique types, even if their signatures are the same |
| |
| eq(bar::<String>, bar::<Vec<u8>>); |
| //~^ ERROR mismatched types |
| //~| found fn item `fn(_) -> _ {bar::<Vec<u8>>}` |
| //~| expected `String`, found `Vec<u8>` |
| |
| // Make sure we distinguish between trait methods correctly. |
| eq(<u8 as Foo>::foo, <u16 as Foo>::foo); |
| //~^ ERROR mismatched types |
| //~| expected `u8`, found `u16` |
| //~| different fn items have unique types, even if their signatures are the same |
| |
| eq(foo::<u8>, bar::<u8> as fn(isize) -> isize); |
| //~^ ERROR mismatched types |
| //~| found fn pointer `fn(_) -> _` |
| //~| expected fn item, found fn pointer |
| |
| eq(foo::<u8> as fn(isize) -> isize, bar::<u8>); // ok! |
| } |