rust/tests/ui/vec_init_then_push.rs

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#![allow(unused_variables)]
#![warn(clippy::vec_init_then_push)]
fn main() {
let mut def_err: Vec<u32> = Default::default();
def_err.push(0);
let mut new_err = Vec::<u32>::new();
new_err.push(1);
let mut cap_err = Vec::with_capacity(2);
cap_err.push(0);
cap_err.push(1);
cap_err.push(2);
if true {
// don't include this one
cap_err.push(3);
}
let mut cap_ok = Vec::with_capacity(10);
cap_ok.push(0);
new_err = Vec::new();
new_err.push(0);
let mut vec = Vec::new();
// control flow at block final expression
if true {
// no lint
vec.push(1);
}
}
pub fn no_lint() -> Vec<i32> {
let mut p = Some(1);
let mut vec = Vec::new();
loop {
match p {
None => return vec,
Some(i) => {
vec.push(i);
p = None;
},
}
}
}