diff options
Diffstat (limited to 'src/test/ui/traits/object/with-self-in-projection-output-repeated-supertrait.rs')
-rw-r--r-- | src/test/ui/traits/object/with-self-in-projection-output-repeated-supertrait.rs | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/src/test/ui/traits/object/with-self-in-projection-output-repeated-supertrait.rs b/src/test/ui/traits/object/with-self-in-projection-output-repeated-supertrait.rs deleted file mode 100644 index 39e817168..000000000 --- a/src/test/ui/traits/object/with-self-in-projection-output-repeated-supertrait.rs +++ /dev/null @@ -1,51 +0,0 @@ -// build-pass (FIXME(62277): could be check-pass?) - -// FIXME(eddyb) shorten the name so windows doesn't choke on it. -#![crate_name = "trait_test"] - -// Regression test related to #56288. Check that a supertrait projection (of -// `Output`) that references `Self` is ok if there is another occurrence of -// the same supertrait that specifies the projection explicitly, even if -// the projection's associated type is not explicitly specified in the object type. -// -// Note that in order for this to compile, we need the `Self`-referencing projection -// to normalize fairly directly to a concrete type, otherwise the trait resolver -// will hate us. -// -// There is a test in `trait-object-with-self-in-projection-output-bad.rs` that -// having a normalizing, but `Self`-containing projection does not *by itself* -// allow you to avoid writing the projected type (`Output`, in this example) -// explicitly. - -trait ConstI32 { - type Out; -} - -impl<T: ?Sized> ConstI32 for T { - type Out = i32; -} - -trait Base { - type Output; -} - -trait NormalizingHelper: Base<Output=<Self as ConstI32>::Out> + Base<Output=i32> { - type Target; -} - -impl Base for u32 -{ - type Output = i32; -} - -impl NormalizingHelper for u32 -{ - type Target = i32; -} - -fn main() { - // Make sure this works both with and without the associated type - // being specified. - let _x: Box<dyn NormalizingHelper<Target=i32>> = Box::new(2u32); - let _y: Box<dyn NormalizingHelper<Target=i32, Output=i32>> = Box::new(2u32); -} |