diff options
Diffstat (limited to 'src/test/ui/traits/trait-upcasting/type-checking-test-2.rs')
-rw-r--r-- | src/test/ui/traits/trait-upcasting/type-checking-test-2.rs | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/test/ui/traits/trait-upcasting/type-checking-test-2.rs b/src/test/ui/traits/trait-upcasting/type-checking-test-2.rs new file mode 100644 index 000000000..32754c538 --- /dev/null +++ b/src/test/ui/traits/trait-upcasting/type-checking-test-2.rs @@ -0,0 +1,32 @@ +#![feature(trait_upcasting)] +#![allow(incomplete_features)] + +trait Foo<T>: Bar<i32> + Bar<T> {} +trait Bar<T> { + fn bar(&self) -> Option<T> { + None + } +} + +fn test_specific(x: &dyn Foo<i32>) { + let _ = x as &dyn Bar<i32>; // OK +} + +fn test_specific2(x: &dyn Foo<u32>) { + let _ = x as &dyn Bar<i32>; // OK +} + +fn test_specific3(x: &dyn Foo<i32>) { + let _ = x as &dyn Bar<u32>; // Error + //~^ ERROR non-primitive cast + //~^^ ERROR the trait bound `&dyn Foo<i32>: Bar<u32>` is not satisfied +} + +fn test_infer_arg(x: &dyn Foo<u32>) { + let a = x as &dyn Bar<_>; // Ambiguous + //~^ ERROR non-primitive cast + //~^^ ERROR the trait bound `&dyn Foo<u32>: Bar<_>` is not satisfied + let _ = a.bar(); +} + +fn main() {} |