src/test/ui/error-codes/e0119/complex-impl.stderr

   1 error[E0117]: only traits defined in the current crate can be implemented for arbitrary types
   2   --> $DIR/complex-impl.rs:9:1
   3    |
   4 LL | impl<R> External for (Q, R) {}
   5    | ^^^^^^^^^^^^^^^^^^^^^------
   6    | |                    |
   7    | |                    this is not defined in the current crate because tuples are always foreign
   8    | impl doesn't use only types from inside the current crate
   9    |
  10    = note: define and implement a trait or new type instead
  11
  12 error: aborting due to previous error
  13
  14 For more information about this error, try `rustc --explain E0117`.