tests/ui/forget_ref.rs

   1 #![warn(clippy::forget_ref)]
   2 #![allow(clippy::toplevel_ref_arg)]
   3 #![allow(clippy::unnecessary_wraps, clippy::forget_non_drop)]
   4 #![allow(clippy::borrow_deref_ref)]
   5
   6 use std::mem::forget;
   7
   8 struct SomeStruct;
   9
  10 fn main() {
  11     forget(&SomeStruct);
  12
  13     let mut owned = SomeStruct;
  14     forget(&owned);
  15     forget(&&owned);
  16     forget(&mut owned);
  17     forget(owned); //OK
  18
  19     let reference1 = &SomeStruct;
  20     forget(&*reference1);
  21
  22     let reference2 = &mut SomeStruct;
  23     forget(reference2);
  24
  25     let ref reference3 = SomeStruct;
  26     forget(reference3);
  27 }
  28
  29 #[allow(dead_code)]
  30 fn test_generic_fn_forget<T>(val: T) {
  31     forget(&val);
  32     forget(val); //OK
  33 }
  34
  35 #[allow(dead_code)]
  36 fn test_similarly_named_function() {
  37     fn forget<T>(_val: T) {}
  38     forget(&SomeStruct); //OK; call to unrelated function which happens to have the same name
  39     std::mem::forget(&SomeStruct);
  40 }
  41
  42 #[derive(Copy, Clone)]
  43 pub struct Error;
  44 fn produce_half_owl_error() -> Result<(), Error> {
  45     Ok(())
  46 }
  47
  48 fn produce_half_owl_ok() -> Result<bool, ()> {
  49     Ok(true)
  50 }