1 // Test that the types of distinct fn items are not compatible by
2 // default. See also `run-pass/fn-item-type-*.rs`.
4 fn foo<T>(x: isize) -> isize { x * 2 }
5 fn bar<T>(x: isize) -> isize { x * 4 }
7 fn eq<T>(x: T, y: T) { }
9 trait Foo { fn foo() { /* this is a default fn */ } }
10 impl<T> Foo for T { /* `foo` is still default here */ }
13 eq(foo::<u8>, bar::<u8>);
14 //~^ ERROR mismatched types
15 //~| expected fn item `fn(_) -> _ {foo::<u8>}`
16 //~| found fn item `fn(_) -> _ {bar::<u8>}`
17 //~| expected fn item, found a different fn item
18 //~| different `fn` items always have unique types, even if their signatures are the same
19 //~| change the expected type to be function pointer
20 //~| if the expected type is due to type inference, cast the expected `fn` to a function pointer
22 eq(foo::<u8>, foo::<i8>);
23 //~^ ERROR mismatched types
24 //~| expected `u8`, found `i8`
25 //~| different `fn` items always have unique types, even if their signatures are the same
26 //~| change the expected type to be function pointer
27 //~| if the expected type is due to type inference, cast the expected `fn` to a function pointer
29 eq(bar::<String>, bar::<Vec<u8>>);
30 //~^ ERROR mismatched types
31 //~| found fn item `fn(_) -> _ {bar::<Vec<u8>>}`
32 //~| expected struct `String`, found struct `Vec`
33 //~| different `fn` items always have unique types, even if their signatures are the same
34 //~| change the expected type to be function pointer
35 //~| if the expected type is due to type inference, cast the expected `fn` to a function pointer
37 // Make sure we distinguish between trait methods correctly.
38 eq(<u8 as Foo>::foo, <u16 as Foo>::foo);
39 //~^ ERROR mismatched types
40 //~| expected `u8`, found `u16`
41 //~| different `fn` items always have unique types, even if their signatures are the same
42 //~| change the expected type to be function pointer
43 //~| if the expected type is due to type inference, cast the expected `fn` to a function pointer
45 eq(foo::<u8>, bar::<u8> as fn(isize) -> isize);
46 //~^ ERROR mismatched types
47 //~| found fn pointer `fn(_) -> _`
48 //~| expected fn item, found fn pointer
49 //~| change the expected type to be function pointer
50 //~| if the expected type is due to type inference, cast the expected `fn` to a function pointer
52 eq(foo::<u8> as fn(isize) -> isize, bar::<u8>); // ok!