error[E0308]: mismatched types
  --> $DIR/assignment-in-if.rs:15:8
   |
LL |     if x = x {
   |        ^^^^^
   |        |
   |        expected bool, found ()
   |        help: try comparing for equality: `x == x`
   |
   = note:   expected type `bool`
           found unit type `()`

error[E0308]: mismatched types
  --> $DIR/assignment-in-if.rs:20:8
   |
LL |     if (x = x) {
   |        ^^^^^^^
   |        |
   |        expected bool, found ()
   |        help: try comparing for equality: `x == x`
   |
   = note:   expected type `bool`
           found unit type `()`

error[E0308]: mismatched types
  --> $DIR/assignment-in-if.rs:25:8
   |
LL |     if y = (Foo { foo: x }) {
   |        ^^^^^^^^^^^^^^^^^^^^
   |        |
   |        expected bool, found ()
   |        help: try comparing for equality: `y == (Foo { foo: x })`
   |
   = note:   expected type `bool`
           found unit type `()`

error[E0308]: mismatched types
  --> $DIR/assignment-in-if.rs:30:8
   |
LL |     if 3 = x {
   |        ^^^^^
   |        |
   |        expected bool, found ()
   |        help: try comparing for equality: `3 == x`
   |
   = note:   expected type `bool`
           found unit type `()`

error[E0308]: mismatched types
  --> $DIR/assignment-in-if.rs:36:13
   |
LL |             x = 4
   |             ^^^^^
   |             |
   |             expected bool, found ()
   |             help: try comparing for equality: `x == 4`
   |
   = note:   expected type `bool`
           found unit type `()`

error[E0308]: mismatched types
  --> $DIR/assignment-in-if.rs:38:13
   |
LL |             x = 5
   |             ^^^^^
   |             |
   |             expected bool, found ()
   |             help: try comparing for equality: `x == 5`
   |
   = note:   expected type `bool`
           found unit type `()`

error: aborting due to 6 previous errors

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