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// RUN: %clang_cc1 -std=c++20 %s -verify
template<typename T, typename U>
U f(T t) {
co_await t;
co_yield t;
1 + co_await t;
1 + co_yield t; // expected-error {{expected expression}}
auto x = co_await t;
auto y = co_yield t;
for co_await (int x : t) {} // expected-warning {{'for co_await' belongs to CoroutineTS instead of C++20, which is deprecated}}
for co_await (int x = 0; x != 10; ++x) {} // expected-error {{'co_await' modifier can only be applied to range-based for loop}}
if (t)
co_return t;
else
co_return {t};
}
struct Y {};
struct X { Y operator co_await(); };
struct Z {};
Y operator co_await(Z);
void f(X x, Z z) {
x.operator co_await();
operator co_await(z);
}
void operator co_await(); // expected-error {{must have at least one parameter}}
void operator co_await(X, Y, Z); // expected-error {{must be a unary operator}}
void operator co_await(int); // expected-error {{parameter of class or enumeration type}}
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