src/test/ui/tuple/builtin-fail.rs

   1 #![feature(tuple_trait)]
   2
   3 fn assert_is_tuple<T: std::marker::Tuple + ?Sized>() {}
   4
   5 struct TupleStruct(i32, i32);
   6
   7 fn from_param_env<T>() {
   8     assert_is_tuple::<T>();
   9     //~^ ERROR `T` is not a tuple
  10 }
  11
  12 fn main() {
  13     assert_is_tuple::<i32>();
  14     //~^ ERROR `i32` is not a tuple
  15     assert_is_tuple::<(i32)>();
  16     //~^ ERROR `i32` is not a tuple
  17     assert_is_tuple::<TupleStruct>();
  18     //~^ ERROR `TupleStruct` is not a tuple
  19 }