49 lines
1.4 KiB
Rust
49 lines
1.4 KiB
Rust
// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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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 ambiguous associated type
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x.next().unwrap()
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}
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fn projection_with_named_trait_is_disallowed(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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{
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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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