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.
14 #[allow(clippy::unnecessary_operation)]
16 "".chars().next() == Some(' ');
17 Some(' ') != "".chars().next();
20 fn chars_cmp_with_unwrap() {
21 let s = String::from("foo");
22 if s.chars().next().unwrap() == 'f' {
26 if s.chars().next_back().unwrap() == 'o' {
30 if s.chars().last().unwrap() == 'o' {
34 if s.chars().next().unwrap() != 'f' {
35 // !s.starts_with('f')
38 if s.chars().next_back().unwrap() != 'o' {
42 if s.chars().last().unwrap() != 'o' {
48 #[allow(clippy::unnecessary_operation)]
50 "".chars().last() == Some(' ');
51 Some(' ') != "".chars().last();
52 "".chars().next_back() == Some(' ');
53 Some(' ') != "".chars().next_back();