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// Test this without pch.
// RUN: %clang_cc1 -include %s -verify -std=c++20 %s
// Test with pch.
// RUN: %clang_cc1 -std=c++20 -emit-pch -o %t %s
// RUN: %clang_cc1 -include-pch %t -verify -std=c++20 %s
#ifndef HEADER
#define HEADER
namespace std {
template <typename... T> struct coroutine_traits;
template <class Promise = void> struct coroutine_handle {
coroutine_handle() = default;
static coroutine_handle from_address(void *) noexcept;
};
template <> struct coroutine_handle<void> {
static coroutine_handle from_address(void *) noexcept;
coroutine_handle() = default;
template <class PromiseType>
coroutine_handle(coroutine_handle<PromiseType>) noexcept;
};
} // namespace std
struct suspend_always {
bool await_ready() noexcept;
void await_suspend(std::coroutine_handle<>) noexcept;
void await_resume() noexcept;
};
template <typename... Args> struct std::coroutine_traits<void, Args...> {
struct promise_type {
void get_return_object() noexcept;
suspend_always initial_suspend() noexcept;
suspend_always final_suspend() noexcept;
void return_void() noexcept;
suspend_always yield_value(int) noexcept;
promise_type();
~promise_type() noexcept;
void unhandled_exception() noexcept;
};
};
template <typename... Args> struct std::coroutine_traits<int, Args...> {
struct promise_type {
int get_return_object() noexcept;
suspend_always initial_suspend() noexcept;
suspend_always final_suspend() noexcept;
void return_value(int) noexcept;
promise_type();
~promise_type() noexcept;
void unhandled_exception() noexcept;
};
};
template <typename T>
void f(T x) { // checks coawait_expr and coroutine_body_stmt
co_yield 42; // checks coyield_expr
co_await x; // checks dependent_coawait
co_return; // checks coreturn_stmt
}
template <typename T>
int f2(T x) { // checks coawait_expr and coroutine_body_stmt
co_return x; // checks coreturn_stmt with expr
}
struct S {};
S operator co_await(S) { return S(); }
template <typename T>
int f3(T x) {
co_await x; // checks dependent_coawait with overloaded co_await operator
}
#else
// expected-no-diagnostics
void g() {
f(suspend_always{});
f2(42);
}
#endif
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