diff options
Diffstat (limited to 'tests/ui/impl-trait/issues/issue-57979-nested-impl-trait-in-assoc-proj.rs')
-rw-r--r-- | tests/ui/impl-trait/issues/issue-57979-nested-impl-trait-in-assoc-proj.rs | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tests/ui/impl-trait/issues/issue-57979-nested-impl-trait-in-assoc-proj.rs b/tests/ui/impl-trait/issues/issue-57979-nested-impl-trait-in-assoc-proj.rs new file mode 100644 index 000000000..5a444d3df --- /dev/null +++ b/tests/ui/impl-trait/issues/issue-57979-nested-impl-trait-in-assoc-proj.rs @@ -0,0 +1,12 @@ +// rust-lang/rust#57979 : the initial support for `impl Trait` didn't +// properly check syntax hidden behind an associated type projection. +// Here we test behavior of occurrences of `impl Trait` within an +// `impl Trait` in that context. + +pub trait Foo<T> { } +pub trait Bar { } +pub trait Quux { type Assoc; } +pub fn demo(_: impl Quux<Assoc=impl Foo<impl Bar>>) { } +//~^ ERROR nested `impl Trait` is not allowed + +fn main() { } |