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, c++14 12 13 // <variant> 14 15 // constexpr bool operator<(monostate, monostate) noexcept { return false; } 16 // constexpr bool operator>(monostate, monostate) noexcept { return false; } 17 // constexpr bool operator<=(monostate, monostate) noexcept { return true; } 18 // constexpr bool operator>=(monostate, monostate) noexcept { return true; } 19 // constexpr bool operator==(monostate, monostate) noexcept { return true; } 20 // constexpr bool operator!=(monostate, monostate) noexcept { return false; } 21 22 #include "test_macros.h" 23 #include <cassert> 24 #include <type_traits> 25 #include <variant> 26 27 int main() { 28 using M = std::monostate; 29 constexpr M m1{}; 30 constexpr M m2{}; 31 { 32 static_assert((m1 < m2) == false, ""); 33 ASSERT_NOEXCEPT(m1 < m2); 34 } 35 { 36 static_assert((m1 > m2) == false, ""); 37 ASSERT_NOEXCEPT(m1 > m2); 38 } 39 { 40 static_assert((m1 <= m2) == true, ""); 41 ASSERT_NOEXCEPT(m1 <= m2); 42 } 43 { 44 static_assert((m1 >= m2) == true, ""); 45 ASSERT_NOEXCEPT(m1 >= m2); 46 } 47 { 48 static_assert((m1 == m2) == true, ""); 49 ASSERT_NOEXCEPT(m1 == m2); 50 } 51 { 52 static_assert((m1 != m2) == false, ""); 53 ASSERT_NOEXCEPT(m1 != m2); 54 } 55 } 56
