error[E0423]: expected value, found struct variant `E::V`
  --> $DIR/struct-literal-variant-in-if.rs:7:13
   |
LL |     if x == E::V { field } {}
   |             ^^^^----------
   |             |
   |             help: surround the struct literal with parenthesis: `(E::V { field })`

error[E0308]: mismatched types
  --> $DIR/struct-literal-variant-in-if.rs:7:20
   |
LL | fn test_E(x: E) {
   |                 - help: try adding a return type: `-> bool`
LL |     let field = true;
LL |     if x == E::V { field } {}
   |                    ^^^^^ expected (), found bool
   |
   = note: expected type `()`
              found type `bool`

error[E0308]: mismatched types
  --> $DIR/struct-literal-variant-in-if.rs:10:20
   |
LL |     let y: usize = ();
   |                    ^^ expected usize, found ()
   |
   = note: expected type `usize`
              found type `()`

error: aborting due to 3 previous errors

Some errors occurred: E0308, E0423.
For more information about an error, try `rustc --explain E0308`.