str::split instead of to_string().split()

[lexeyOK]

What it does

It suggests to use str::split instead of chaining .to_string().split().

Lint Name

str_split_instead_of_to_string_chain

Category

style

Advantage

shorter, there is no overhead as far as i know
https://godbolt.org/z/ET7Y55P4E

Drawbacks

No response

Example

fn count_string(s: &str) -> usize {
    s.to_string().split(",").count()
}

Could be written as:

fn count_str(s: &str) -> usize {
    s.split(",").count()
}

[Alexendoo]

Would be a good enhancement to unnecessary_to_owned

[GuillaumeGomez]

Sending a PR shortly to handle this case.