rust-clippy/tests/ui/unnecessary_join.rs

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2022-03-24 12:18:18 +00:00
#![warn(clippy::unnecessary_join)]
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#![allow(clippy::uninlined_format_args, clippy::useless_vec)]
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fn main() {
// should be linted
let vector = vec!["hello", "world"];
let output = vector
.iter()
.map(|item| item.to_uppercase())
.collect::<Vec<String>>()
.join("");
println!("{}", output);
// should be linted
let vector = vec!["hello", "world"];
let output = vector
.iter()
.map(|item| item.to_uppercase())
.collect::<Vec<_>>()
.join("");
println!("{}", output);
// should not be linted
let vector = vec!["hello", "world"];
let output = vector
.iter()
.map(|item| item.to_uppercase())
.collect::<Vec<String>>()
.join("\n");
println!("{}", output);
// should not be linted
let vector = vec!["hello", "world"];
let output = vector.iter().map(|item| item.to_uppercase()).collect::<String>();
println!("{}", output);
}