src/librustc_error_codes/error_codes/E0403.md

   1 Some type parameters have the same name.
   2
   3 Erroneous code example:
   4
   5 ```compile_fail,E0403
   6 fn f<T, T>(s: T, u: T) {} // error: the name `T` is already used for a generic
   7                           //        parameter in this item's generic parameters
   8 ```
   9
  10 Please verify that none of the type parameters are misspelled, and rename any
  11 clashing parameters. Example:
  12
  13 ```
  14 fn f<T, Y>(s: T, u: Y) {} // ok!
  15 ```
  16
  17 Type parameters in an associated item also cannot shadow parameters from the
  18 containing item:
  19
  20 ```compile_fail,E0403
  21 trait Foo<T> {
  22     fn do_something(&self) -> T;
  23     fn do_something_else<T: Clone>(&self, bar: T);
  24 }
  25 ```