1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // The LLVM Compiler Infrastructure 5 // 6 // This file is dual licensed under the MIT and the University of Illinois Open 7 // Source Licenses. See LICENSE.TXT for details. 8 // 9 //===----------------------------------------------------------------------===// 10 11 // UNSUPPORTED: c++98, c++03, c++11 12 13 // <experimental/coroutine> 14 15 // template <class Promise = void> 16 // struct coroutine_handle; 17 18 // constexpr explicit operator bool() const noexcept 19 20 #include <experimental/coroutine> 21 #include <type_traits> 22 #include <cassert> 23 24 #include "test_macros.h" 25 26 namespace coro = std::experimental; 27 28 template <class C> 29 void do_test() { 30 static_assert(std::is_nothrow_constructible<bool, C>::value, ""); 31 static_assert(!std::is_convertible<C, bool>::value, ""); 32 { 33 constexpr C c; ((void)c); 34 static_assert(bool(c) == false, ""); 35 } 36 { // null case 37 const C c = {}; ((void)c); 38 ASSERT_NOEXCEPT(bool(c)); 39 if (c) 40 assert(false); 41 else 42 assert(true); 43 assert(c.address() == nullptr); 44 assert(bool(c) == false); 45 } 46 { // non-null case 47 char dummy = 42; 48 C c = C::from_address((void*)&dummy); 49 assert(c.address() == &dummy); 50 assert(bool(c) == true); 51 } 52 } 53 54 int main() 55 { 56 do_test<coro::coroutine_handle<>>(); 57 do_test<coro::coroutine_handle<int>>(); 58 } 59
