diff options
Diffstat (limited to 'src/test/ui/impl-trait/impl_trait_projections.rs')
-rw-r--r-- | src/test/ui/impl-trait/impl_trait_projections.rs | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/test/ui/impl-trait/impl_trait_projections.rs b/src/test/ui/impl-trait/impl_trait_projections.rs new file mode 100644 index 000000000..fd0986d7c --- /dev/null +++ b/src/test/ui/impl-trait/impl_trait_projections.rs @@ -0,0 +1,39 @@ +use std::fmt::Debug; +use std::option; + +fn parametrized_type_is_allowed() -> Option<impl Debug> { + Some(5i32) +} + +fn path_parametrized_type_is_allowed() -> option::Option<impl Debug> { + Some(5i32) +} + +fn projection_is_disallowed(x: impl Iterator) -> <impl Iterator>::Item { +//~^ ERROR `impl Trait` is not allowed in path parameters +//~^^ ERROR ambiguous associated type + x.next().unwrap() +} + +fn projection_with_named_trait_is_disallowed(x: impl Iterator) + -> <impl Iterator as Iterator>::Item +//~^ ERROR `impl Trait` is not allowed in path parameters +{ + x.next().unwrap() +} + +fn projection_with_named_trait_inside_path_is_disallowed() + -> <::std::ops::Range<impl Debug> as Iterator>::Item +//~^ ERROR `impl Trait` is not allowed in path parameters +{ + (1i32..100).next().unwrap() +} + +fn projection_from_impl_trait_inside_dyn_trait_is_disallowed() + -> <dyn Iterator<Item = impl Debug> as Iterator>::Item +//~^ ERROR `impl Trait` is not allowed in path parameters +{ + panic!() +} + +fn main() {} |