--- /dev/null
+// run-rustfix
+#![warn(clippy::map_identity)]
+#![allow(clippy::needless_return)]
+
+fn main() {
+ let x: [u16; 3] = [1, 2, 3];
+ // should lint
+ let _: Vec<_> = x.iter().map(not_identity).collect();
+ let _: Vec<_> = x.iter().collect();
+ let _: Option<u8> = Some(3);
+ let _: Result<i8, f32> = Ok(-3);
+ // should not lint
+ let _: Vec<_> = x.iter().map(|x| 2 * x).collect();
+ let _: Vec<_> = x.iter().map(not_identity).map(|x| return x - 4).collect();
+ let _: Option<u8> = None.map(|x: u8| x - 1);
+ let _: Result<i8, f32> = Err(2.3).map(|x: i8| {
+ return x + 3;
+ });
+}
+
+fn not_identity(x: &u16) -> u16 {
+ *x
+}