error[E0044]: foreign items may not have type parameters
  --> $DIR/E0044.rs:2:5
   |
LL |     fn sqrt<T>(f: T) -> T;
   |     ^^^^^^^^^^^^^^^^^^^^^^ can't have type parameters
   |
   = help: replace the type parameters with concrete types like `u32`

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0044`.