mirror of https://github.com/rust-lang/rust
42 lines
1.1 KiB
Rust
42 lines
1.1 KiB
Rust
use std::fmt::Debug;
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use std::option;
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fn parametrized_type_is_allowed() -> Option<impl Debug> {
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Some(5i32)
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}
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fn path_parametrized_type_is_allowed() -> option::Option<impl Debug> {
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Some(5i32)
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}
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fn projection_is_disallowed(x: impl Iterator) -> <impl Iterator>::Item {
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//~^ ERROR `impl Trait` is not allowed in path parameters
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//~| ERROR `impl Trait` is not allowed in path parameters
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x.next().unwrap()
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}
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fn projection_with_named_trait_is_disallowed(mut x: impl Iterator)
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-> <impl Iterator as Iterator>::Item
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//~^ ERROR `impl Trait` is not allowed in path parameters
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{
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x.next().unwrap()
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}
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fn projection_with_named_trait_inside_path_is_disallowed()
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-> <::std::ops::Range<impl Debug> as Iterator>::Item
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//~^ ERROR `impl Trait` is not allowed in path parameters
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//~| ERROR `impl Debug: Step` is not satisfied
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{
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//~^ ERROR `impl Debug: Step` is not satisfied
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(1i32..100).next().unwrap()
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}
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fn projection_from_impl_trait_inside_dyn_trait_is_disallowed()
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-> <dyn Iterator<Item = impl Debug> as Iterator>::Item
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//~^ ERROR `impl Trait` is not allowed in path parameters
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{
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panic!()
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}
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fn main() {}
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