dbf994bbaf
associated machinery. Future such attempts should go through lints anyhow. There is a fair amount of fallout in the compile-fail tests, as WF checking now occurs earlier in the process.
34 lines
983 B
Rust
34 lines
983 B
Rust
// Copyright 2014 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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// Issue #5886: a complex instance of issue #2687.
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trait Iterator<A> {
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fn next(&mut self) -> Option<A>;
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}
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trait IteratorUtil<A>: Sized
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{
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fn zip<B, U: Iterator<U>>(self, other: U) -> ZipIterator<Self, U>;
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}
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impl<A, T: Iterator<A>> IteratorUtil<A> for T {
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fn zip<B, U: Iterator<B>>(self, other: U) -> ZipIterator<T, U> {
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//~^ ERROR the requirement `U : Iterator<B>` appears on the impl method
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ZipIterator{a: self, b: other}
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}
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}
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struct ZipIterator<T, U> {
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a: T, b: U
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}
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fn main() {}
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