diff options
Diffstat (limited to 'src/test/ui/associated-types/associated-types-projection-in-supertrait.rs')
-rw-r--r-- | src/test/ui/associated-types/associated-types-projection-in-supertrait.rs | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/associated-types-projection-in-supertrait.rs b/src/test/ui/associated-types/associated-types-projection-in-supertrait.rs new file mode 100644 index 000000000..ead405fcf --- /dev/null +++ b/src/test/ui/associated-types/associated-types-projection-in-supertrait.rs @@ -0,0 +1,45 @@ +// run-pass +#![allow(dead_code)] +// Test that we are handle to correctly handle a projection type +// that appears in a supertrait bound. Issue #20559. + + +trait A +{ + type TA; + + fn dummy(&self) { } +} + +trait B<TB> +{ + fn foo (&self, t : TB) -> String; +} + +trait C<TC : A> : B<<TC as A>::TA> { } + +struct X; + +impl A for X +{ + type TA = i32; +} + +struct Y; + +impl C<X> for Y { } + +// Both of these impls are required for successful compilation +impl B<i32> for Y +{ + fn foo (&self, t : i32) -> String + { + format!("First {}", t) + } +} + +fn main () +{ + let y = Y; + assert_eq!(y.foo(5), format!("First 5")); +} |