rust/tests/ui/starts_ends_with.rs

47 lines
1.1 KiB
Rust
Raw Normal View History

2019-01-13 19:40:14 +01:00
// run-rustfix
#![allow(dead_code, unused_must_use)]
2017-10-10 05:45:03 +02:00
fn main() {}
2018-07-28 17:34:52 +02:00
#[allow(clippy::unnecessary_operation)]
2017-10-10 05:45:03 +02:00
fn starts_with() {
"".chars().next() == Some(' ');
Some(' ') != "".chars().next();
}
fn chars_cmp_with_unwrap() {
let s = String::from("foo");
2018-12-09 23:26:16 +01:00
if s.chars().next().unwrap() == 'f' {
// s.starts_with('f')
2017-10-10 05:45:03 +02:00
// Nothing here
}
2018-12-09 23:26:16 +01:00
if s.chars().next_back().unwrap() == 'o' {
// s.ends_with('o')
2017-10-10 05:45:03 +02:00
// Nothing here
}
2018-12-09 23:26:16 +01:00
if s.chars().last().unwrap() == 'o' {
// s.ends_with('o')
2017-10-10 05:45:03 +02:00
// Nothing here
}
2018-12-09 23:26:16 +01:00
if s.chars().next().unwrap() != 'f' {
// !s.starts_with('f')
2017-10-10 05:45:03 +02:00
// Nothing here
}
2018-12-09 23:26:16 +01:00
if s.chars().next_back().unwrap() != 'o' {
// !s.ends_with('o')
2017-10-10 05:45:03 +02:00
// Nothing here
}
2018-12-09 23:26:16 +01:00
if s.chars().last().unwrap() != 'o' {
// !s.ends_with('o')
2017-10-10 05:45:03 +02:00
// Nothing here
}
}
2018-07-28 17:34:52 +02:00
#[allow(clippy::unnecessary_operation)]
2017-10-10 05:45:03 +02:00
fn ends_with() {
"".chars().last() == Some(' ');
Some(' ') != "".chars().last();
"".chars().next_back() == Some(' ');
Some(' ') != "".chars().next_back();
}