1 // Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution.
4 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
5 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
7 // option. This file may not be copied, modified, or distributed
8 // except according to those terms.
10 #![deny(clippy::while_let_on_iterator)]
12 use std::iter::Iterator;
17 fn foo1<I: Iterator<Item = usize>>(mut it: I) {
18 while let Some(_) = it.next() {
19 println!("{:?}", it.size_hint());
23 fn foo2<I: Iterator<Item = usize>>(mut it: I) {
24 while let Some(e) = it.next() {
31 Foo::foo1(vec![].into_iter());
32 Foo::foo2(vec![].into_iter());