rust-clippy/tests/ui/starts_ends_with.rs
2017-10-09 23:36:29 -05:00

39 lines
1,001 B
Rust

#![allow(dead_code)]
fn main() {}
#[allow(unnecessary_operation)]
fn starts_with() {
"".chars().next() == Some(' ');
Some(' ') != "".chars().next();
}
fn chars_cmp_with_unwrap() {
let s = String::from("foo");
if s.chars().next().unwrap() == 'f' { // s.starts_with('f')
// Nothing here
}
if s.chars().next_back().unwrap() == 'o' { // s.ends_with('o')
// Nothing here
}
if s.chars().last().unwrap() == 'o' { // s.ends_with('o')
// Nothing here
}
if s.chars().next().unwrap() != 'f' { // !s.starts_with('f')
// Nothing here
}
if s.chars().next_back().unwrap() != 'o' { // !s.ends_with('o')
// Nothing here
}
if s.chars().last().unwrap() != 'o' { // !s.ends_with('o')
// Nothing here
}
}
#[allow(unnecessary_operation)]
fn ends_with() {
"".chars().last() == Some(' ');
Some(' ') != "".chars().last();
"".chars().next_back() == Some(' ');
Some(' ') != "".chars().next_back();
}