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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
// <experimental/coroutine>
// template <class Promise = void>
// struct coroutine_handle;
// void operator()()
// void resume()
#include <experimental/coroutine>
#include <type_traits>
#include <memory>
#include <utility>
#include <cstdint>
#include <cassert>
#include "test_macros.h"
namespace coro = std::experimental;
template <class H>
auto has_resume_imp(H&& h, int) -> decltype(h.resume(), std::true_type{});
template <class H>
auto has_resume_imp(H&&, long) -> std::false_type;
template <class H>
constexpr bool has_resume() {
return decltype(has_resume_imp(std::declval<H>(), 0))::value;
}
template <class H>
auto has_call_operator_imp(H&& h, int) -> decltype(h(), std::true_type{});
template <class H>
auto has_call_operator_imp(H&&, long) -> std::false_type;
template <class H>
constexpr bool has_call_operator() {
return decltype(has_call_operator_imp(std::declval<H>(), 0))::value;
}
template <class Promise>
void do_test(coro::coroutine_handle<Promise>&& H) {
using HType = coro::coroutine_handle<Promise>;
// FIXME Add a runtime test
{
ASSERT_SAME_TYPE(decltype(H.resume()), void);
ASSERT_SAME_TYPE(decltype(H()), void);
LIBCPP_ASSERT_NOT_NOEXCEPT(H.resume());
LIBCPP_ASSERT_NOT_NOEXCEPT(H());
static_assert(has_resume<HType&>(), "");
static_assert(has_resume<HType&&>(), "");
static_assert(has_call_operator<HType&>(), "");
static_assert(has_call_operator<HType&&>(), "");
}
{
static_assert(!has_resume<HType const&>(), "");
static_assert(!has_resume<HType const&&>(), "");
static_assert(!has_call_operator<HType const&>(), "");
static_assert(!has_call_operator<HType const&&>(), "");
}
}
int main()
{
do_test(coro::coroutine_handle<>{});
do_test(coro::coroutine_handle<int>{});
}
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