src/tools/clippy/tests/ui/match_as_ref.stderr

error: manual implementation of `Option::as_ref`
  --> tests/ui/match_as_ref.rs:6:33
   |
LL |       let borrowed: Option<&()> = match owned {
   |  _________________________________^
LL | |
LL | |         None => None,
LL | |         Some(ref v) => Some(v),
LL | |     };
   | |_____^
   |
   = note: `-D clippy::match-as-ref` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::match_as_ref)]`
help: use `Option::as_ref()` directly
   |
LL -     let borrowed: Option<&()> = match owned {
LL -
LL -         None => None,
LL -         Some(ref v) => Some(v),
LL -     };
LL +     let borrowed: Option<&()> = owned.as_ref();
   |

error: manual implementation of `Option::as_mut`
  --> tests/ui/match_as_ref.rs:13:39
   |
LL |       let borrow_mut: Option<&mut ()> = match mut_owned {
   |  _______________________________________^
LL | |
LL | |         None => None,
LL | |         Some(ref mut v) => Some(v),
LL | |     };
   | |_____^
   |
help: use `Option::as_mut()` directly
   |
LL -     let borrow_mut: Option<&mut ()> = match mut_owned {
LL -
LL -         None => None,
LL -         Some(ref mut v) => Some(v),
LL -     };
LL +     let borrow_mut: Option<&mut ()> = mut_owned.as_mut();
   |

error: manual implementation of `Option::as_ref`
  --> tests/ui/match_as_ref.rs:32:13
   |
LL | /             match self.source {
LL | |
LL | |                 Some(ref s) => Some(s),
LL | |                 None => None,
LL | |             }
   | |_____________^
   |
help: use `Option::as_ref()` directly
   |
LL -             match self.source {
LL -
LL -                 Some(ref s) => Some(s),
LL -                 None => None,
LL -             }
LL +             self.source.as_ref().map(|x| x as _)
   |

error: manual implementation of `Option::as_ref`
  --> tests/ui/match_as_ref.rs:97:13
   |
LL |       let _ = match !S {
   |  _____________^
LL | |
LL | |         None => None,
LL | |         Some(ref v) => Some(v),
LL | |     };
   | |_____^
   |
help: use `Option::as_ref()` directly
   |
LL -     let _ = match !S {
LL -
LL -         None => None,
LL -         Some(ref v) => Some(v),
LL -     };
LL +     let _ = (!S).as_ref();
   |

error: manual implementation of `Option::as_mut`
  --> tests/ui/match_as_ref.rs:105:27
   |
LL |       let _: Option<&u32> = match Some(0) {
   |  ___________________________^
LL | |
LL | |         None => None,
LL | |         Some(ref mut v) => Some(v),
LL | |     };
   | |_____^
   |
   = note: but the type is coerced to a non-mutable reference, and so `as_ref` can used instead
help: use `Option::as_ref()`
   |
LL -     let _: Option<&u32> = match Some(0) {
LL -
LL -         None => None,
LL -         Some(ref mut v) => Some(v),
LL -     };
LL +     let _: Option<&u32> = Some(0).as_ref();
   |

error: manual implementation of `Option::as_mut`
  --> tests/ui/match_as_ref.rs:111:43
   |
LL |       let _: Option<&dyn std::fmt::Debug> = match Some(0) {
   |  ___________________________________________^
LL | |
LL | |         None => None,
LL | |         Some(ref mut v) => Some(v),
LL | |     };
   | |_____^
   |
   = note: but the type is coerced to a non-mutable reference, and so `as_ref` can used instead
help: use `Option::as_ref()`
   |
LL -     let _: Option<&dyn std::fmt::Debug> = match Some(0) {
LL -
LL -         None => None,
LL -         Some(ref mut v) => Some(v),
LL -     };
LL +     let _: Option<&dyn std::fmt::Debug> = Some(0).as_ref().map(|x| x as _);
   |

error: aborting due to 6 previous errors