Rust "extension method" to turn empty containers into Nones

drop_empty.rs

fn main() {
	let a = String::from("This is a test").drop_empty();
	println!("{:?}", &a);
	let b = String::from("").drop_empty();
	println!("{:?}", &b);
	let c = vec![0, 69, 420].drop_empty();
	println!("{:?}", &c);
}

trait DropEmpty: Sized {
	fn drop_empty(self) -> Option<Self>;
}

impl DropEmpty for String {
	fn drop_empty(self) -> Option<String> {
		if self.is_empty() {
			None
		} else {
			Some(self)
		}
	}
}

impl<T> DropEmpty for Vec<T> {
	fn drop_empty(self) -> Option<Vec<T>> {
		if self.is_empty() {
			None
		} else {
			Some(self)
		}
	}
}