tests/ui/forget_ref.rs

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