36 lines · cpp
1// RUN: %clang_cc1 -std=c++20 %s -verify2 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) {} // expected-warning {{'for co_await' belongs to CoroutineTS instead of C++20, which is deprecated}}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 else20 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