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.
11 #![feature(tool_lints)]
17 #[allow(clippy::unnecessary_operation)]
19 "".chars().next() == Some(' ');
20 Some(' ') != "".chars().next();
23 fn chars_cmp_with_unwrap() {
24 let s = String::from("foo");
25 if s.chars().next().unwrap() == 'f' { // s.starts_with('f')
28 if s.chars().next_back().unwrap() == 'o' { // s.ends_with('o')
31 if s.chars().last().unwrap() == 'o' { // s.ends_with('o')
34 if s.chars().next().unwrap() != 'f' { // !s.starts_with('f')
37 if s.chars().next_back().unwrap() != 'o' { // !s.ends_with('o')
40 if s.chars().last().unwrap() != 'o' { // !s.ends_with('o')
45 #[allow(clippy::unnecessary_operation)]
47 "".chars().last() == Some(' ');
48 Some(' ') != "".chars().last();
49 "".chars().next_back() == Some(' ');
50 Some(' ') != "".chars().next_back();