rust/tests/ui/pattern/rfc-3627-match-ergonomics-2024/experimental/pattern-errors.classic2021.stderr

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:20:27
   |
LL |     if let Some(&mut Some(&x)) = &Some(&mut Some(0)) {
   |                           ^^     ------------------- this expression has type `&Option<&mut Option<{integer}>>`
   |                           |
   |                           expected integer, found `&_`
   |
   = note:   expected type `{integer}`
           found reference `&_`
help: consider removing `&` from the pattern
   |
LL -     if let Some(&mut Some(&x)) = &Some(&mut Some(0)) {
LL +     if let Some(&mut Some(x)) = &Some(&mut Some(0)) {
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:33:17
   |
LL |     if let Some(&mut Some(&_)) = &Some(&Some(0)) {
   |                 ^^^^^^^^^^^^^    --------------- this expression has type `&Option<&Option<{integer}>>`
   |                 |
   |                 types differ in mutability
   |
   = note:      expected reference `&Option<{integer}>`
           found mutable reference `&mut _`

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:38:23
   |
LL |     if let Some(&Some(&mut x)) = &Some(&mut Some(0)) {
   |                       ^^^^^^     ------------------- this expression has type `&Option<&mut Option<{integer}>>`
   |                       |
   |                       expected integer, found `&mut _`
   |
   = note:           expected type `{integer}`
           found mutable reference `&mut _`
note: to declare a mutable binding use: `mut x`
  --> $DIR/pattern-errors.rs:38:23
   |
LL |     if let Some(&Some(&mut x)) = &Some(&mut Some(0)) {
   |                       ^^^^^^
help: consider removing `&mut` from the pattern
   |
LL -     if let Some(&Some(&mut x)) = &Some(&mut Some(0)) {
LL +     if let Some(&Some(x)) = &Some(&mut Some(0)) {
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:45:23
   |
LL |     if let Some(&Some(&mut _)) = &mut Some(&Some(0)) {
   |                       ^^^^^^     ------------------- this expression has type `&mut Option<&Option<{integer}>>`
   |                       |
   |                       expected integer, found `&mut _`
   |
   = note:           expected type `{integer}`
           found mutable reference `&mut _`

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:56:17
   |
LL |     if let Some(&mut Some(x)) = &Some(Some(0)) {
   |                 ^^^^^
   |
   = note: cannot match inherited `&` with `&mut` pattern
help: replace this `&mut` pattern with `&`
   |
LL -     if let Some(&mut Some(x)) = &Some(Some(0)) {
LL +     if let Some(&Some(x)) = &Some(Some(0)) {
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:114:11
   |
LL |     let [&&mut x] = &[&mut 0];
   |           ^^^^^^    --------- this expression has type `&[&mut {integer}; 1]`
   |           |
   |           expected integer, found `&mut _`
   |
   = note:           expected type `{integer}`
           found mutable reference `&mut _`
help: consider removing `&mut` from the pattern
   |
LL -     let [&&mut x] = &[&mut 0];
LL +     let [&x] = &[&mut 0];
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:121:11
   |
LL |     let [&&mut x] = &mut [&mut 0];
   |           ^^^^^^    ------------- this expression has type `&mut [&mut {integer}; 1]`
   |           |
   |           expected integer, found `&mut _`
   |
   = note:           expected type `{integer}`
           found mutable reference `&mut _`
help: consider removing `&mut` from the pattern
   |
LL -     let [&&mut x] = &mut [&mut 0];
LL +     let [&x] = &mut [&mut 0];
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:128:11
   |
LL |     let [&&mut ref x] = &[&mut 0];
   |           ^^^^^^^^^^    --------- this expression has type `&[&mut {integer}; 1]`
   |           |
   |           expected integer, found `&mut _`
   |
   = note:           expected type `{integer}`
           found mutable reference `&mut _`
help: consider removing `&mut` from the pattern
   |
LL -     let [&&mut ref x] = &[&mut 0];
LL +     let [&ref x] = &[&mut 0];
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:135:11
   |
LL |     let [&&mut ref x] = &mut [&mut 0];
   |           ^^^^^^^^^^    ------------- this expression has type `&mut [&mut {integer}; 1]`
   |           |
   |           expected integer, found `&mut _`
   |
   = note:           expected type `{integer}`
           found mutable reference `&mut _`
help: consider removing `&mut` from the pattern
   |
LL -     let [&&mut ref x] = &mut [&mut 0];
LL +     let [&ref x] = &mut [&mut 0];
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:142:11
   |
LL |     let [&&mut mut x] = &[&mut 0];
   |           ^^^^^^^^^^    --------- this expression has type `&[&mut {integer}; 1]`
   |           |
   |           expected integer, found `&mut _`
   |
   = note:           expected type `{integer}`
           found mutable reference `&mut _`
help: consider removing `&mut` from the pattern
   |
LL -     let [&&mut mut x] = &[&mut 0];
LL +     let [&mut x] = &[&mut 0];
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:149:11
   |
LL |     let [&&mut mut x] = &mut [&mut 0];
   |           ^^^^^^^^^^    ------------- this expression has type `&mut [&mut {integer}; 1]`
   |           |
   |           expected integer, found `&mut _`
   |
   = note:           expected type `{integer}`
           found mutable reference `&mut _`
help: consider removing `&mut` from the pattern
   |
LL -     let [&&mut mut x] = &mut [&mut 0];
LL +     let [&mut x] = &mut [&mut 0];
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:164:15
   |
LL |     let [&mut &x] = &[&mut 0];
   |               ^^    --------- this expression has type `&[&mut {integer}; 1]`
   |               |
   |               expected integer, found `&_`
   |
   = note:   expected type `{integer}`
           found reference `&_`
help: consider removing `&` from the pattern
   |
LL -     let [&mut &x] = &[&mut 0];
LL +     let [&mut x] = &[&mut 0];
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:170:15
   |
LL |     let [&mut &ref x] = &[&mut 0];
   |               ^^^^^^    --------- this expression has type `&[&mut {integer}; 1]`
   |               |
   |               expected integer, found `&_`
   |
   = note:   expected type `{integer}`
           found reference `&_`
help: consider removing `&` from the pattern
   |
LL -     let [&mut &ref x] = &[&mut 0];
LL +     let [&mut ref x] = &[&mut 0];
   |

error[E0308]: mismatched types
  --> $DIR/pattern-errors.rs:176:15
   |
LL |     let [&mut &(mut x)] = &[&mut 0];
   |               ^^^^^^^^    --------- this expression has type `&[&mut {integer}; 1]`
   |               |
   |               expected integer, found `&_`
   |
   = note:   expected type `{integer}`
           found reference `&_`
help: consider removing `&` from the pattern
   |
LL -     let [&mut &(mut x)] = &[&mut 0];
LL +     let [&mut mut x)] = &[&mut 0];
   |

error: aborting due to 14 previous errors

For more information about this error, try `rustc --explain E0308`.