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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11
// REQUIRES: fcoroutines-ts
// RUN: %build -fcoroutines-ts
// RUN: %run
#include <experimental/coroutine>
#include <cassert>
#include "test_macros.h"
using namespace std::experimental;
int alive = 0;
int ctor_called = 0;
int dtor_called = 0;
void reset() {
assert(alive == 0);
alive = 0;
ctor_called = 0;
dtor_called = 0;
}
struct Noisy {
Noisy() { ++alive; ++ctor_called; }
~Noisy() { --alive; ++dtor_called; }
#if TEST_STD_VER > 14
Noisy(Noisy const&) = delete;
#else
// FIXME: This test depends on copy elision taking place in C++14
// (pre-c++17 guaranteed copy elision)
Noisy(Noisy const&);
#endif
};
struct Bug {
bool await_ready() { return true; }
void await_suspend(std::experimental::coroutine_handle<>) {}
Noisy await_resume() { return {}; }
};
struct coro2 {
struct promise_type {
suspend_never initial_suspend() { return{}; }
suspend_never final_suspend() { return{}; }
coro2 get_return_object() { return{}; }
void return_void() {}
Bug yield_value(int) { return {}; }
void unhandled_exception() {}
};
};
// Checks that destructors are correctly invoked for the object returned by
// coawait.
coro2 a() {
reset();
{
auto x = co_await Bug{};
assert(alive == 1);
assert(ctor_called == 1);
assert(dtor_called == 0);
}
assert(alive == 0);
assert(dtor_called == 1);
}
coro2 b() {
reset();
{
co_await Bug{};
assert(ctor_called == 1);
assert(dtor_called == 1);
assert(alive == 0);
}
assert(ctor_called == 1);
assert(dtor_called == 1);
assert(alive == 0);
}
coro2 c() {
reset();
{
auto x = co_yield 42;
assert(alive == 1);
assert(ctor_called == 1);
assert(dtor_called == 0);
}
assert(alive == 0);
assert(ctor_called == 1);
assert(dtor_called == 1);
}
coro2 d() {
reset();
{
co_yield 42;
assert(ctor_called == 1);
assert(dtor_called == 1);
assert(alive == 0);
}
assert(alive == 0);
assert(ctor_called == 1);
assert(dtor_called == 1);
}
int main() {
a();
b();
c();
d();
}
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