error[E0618]: expected function, found `Empty2`
  --> $DIR/empty-struct-unit-expr.rs:15:14
   |
LL | struct Empty2;
   | -------------- `Empty2` defined here
...
LL |     let e2 = Empty2();
   |              ^^^^^^--
   |              |
   |              call expression requires function

error[E0618]: expected function, found enum variant `E::Empty4`
  --> $DIR/empty-struct-unit-expr.rs:16:14
   |
LL |     Empty4
   |     ------ `E::Empty4` defined here
...
LL |     let e4 = E::Empty4();
   |              ^^^^^^^^^--
   |              |
   |              call expression requires function
   |
help: `E::Empty4` is a unit variant, you need to write it without the parentheses
   |
LL -     let e4 = E::Empty4();
LL +     let e4 = E::Empty4;
   |

error[E0618]: expected function, found `empty_struct::XEmpty2`
  --> $DIR/empty-struct-unit-expr.rs:18:15
   |
LL |     let xe2 = XEmpty2();
   |               ^^^^^^^--
   |               |
   |               call expression requires function

error[E0618]: expected function, found enum variant `XE::XEmpty4`
  --> $DIR/empty-struct-unit-expr.rs:19:15
   |
LL |     let xe4 = XE::XEmpty4();
   |               ^^^^^^^^^^^--
   |               |
   |               call expression requires function
   |
help: `XE::XEmpty4` is a unit variant, you need to write it without the parentheses
   |
LL -     let xe4 = XE::XEmpty4();
LL +     let xe4 = XE::XEmpty4;
   |

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0618`.