compiler/rustc_error_codes/src/error_codes/E0574.md

   1 Something other than a struct, variant or union has been used when one was
   2 expected.
   3
   4 Erroneous code example:
   5
   6 ```compile_fail,E0574
   7 mod Mordor {}
   8
   9 let sauron = Mordor { x: () }; // error!
  10
  11 enum Jak {
  12     Daxter { i: isize },
  13 }
  14
  15 let eco = Jak::Daxter { i: 1 };
  16 match eco {
  17     Jak { i } => {} // error!
  18 }
  19 ```
  20
  21 In all these errors, a type was expected. For example, in the first error,
  22 we tried to instantiate the `Mordor` module, which is impossible. If you want
  23 to instantiate a type inside a module, you can do it as follow:
  24
  25 ```
  26 mod Mordor {
  27     pub struct TheRing {
  28         pub x: usize,
  29     }
  30 }
  31
  32 let sauron = Mordor::TheRing { x: 1 }; // ok!
  33 ```
  34
  35 In the second error, we tried to bind the `Jak` enum directly, which is not
  36 possible: you can only bind one of its variants. To do so:
  37
  38 ```
  39 enum Jak {
  40     Daxter { i: isize },
  41 }
  42
  43 let eco = Jak::Daxter { i: 1 };
  44 match eco {
  45     Jak::Daxter { i } => {} // ok!
  46 }
  47 ```