What it does

Checks for .truncate(0) calls on standard library types like Vec, VecDeque, String, and OsString where it can be replaced with .clear().

Advantage

clear() expresses the intent better and is likely to be more efficient than truncate(0).

Drawbacks

No response

Example

let mut v = vec![1, 2, 3];
v.truncate(0);

Could be written as:

let mut v = vec![1, 2, 3];
v.clear();

Comparison with existing lints

No response

Additional Context

rust-lang/rust@9c59d04