1// RUN: %clang_cc1 -std=c++11 -fcoroutines %s -verify
2
3template<typename T, typename U>
4U f(T t) {
5  co_await t;
6  co_yield t;
7
8  1 + co_await t;
9  1 + co_yield t; // expected-error {{expected expression}}
10
11  auto x = co_await t;
12  auto y = co_yield t;
13
14  for co_await (int x : t) {}
15  for co_await (int x = 0; x != 10; ++x) {} // expected-error {{'co_await' modifier can only be applied to range-based for loop}}
16
17  if (t)
18    co_return t;
19  else
20    co_return {t};
21}
22
23struct Y {};
24struct X { Y operator co_await(); };
25struct Z {};
26Y operator co_await(Z);
27
28void f(X x, Z z) {
29  x.operator co_await();
30  operator co_await(z);
31}
32
33void operator co_await(); // expected-error {{must have at least one parameter}}
34void operator co_await(X, Y, Z); // expected-error {{must be a unary operator}}
35void operator co_await(int); // expected-error {{parameter of class or enumeration type}}
36