src/librustc_error_codes/error_codes/E0606.md

   1 An incompatible cast was attempted.
   2
   3 Erroneous code example:
   4
   5 ```compile_fail,E0606
   6 let x = &0u8; // Here, `x` is a `&u8`.
   7 let y: u32 = x as u32; // error: casting `&u8` as `u32` is invalid
   8 ```
   9
  10 When casting, keep in mind that only primitive types can be cast into each
  11 other. Example:
  12
  13 ```
  14 let x = &0u8;
  15 let y: u32 = *x as u32; // We dereference it first and then cast it.
  16 ```
  17
  18 For more information about casts, take a look at the Type cast section in
  19 [The Reference Book][1].
  20
  21 [1]: https://doc.rust-lang.org/reference/expressions/operator-expr.html#type-cast-expressions