1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // test numeric_limits 11 12 // quiet_NaN() 13 14 #include <limits> 15 #include <cmath> 16 #include <type_traits> 17 #include <cassert> 18 19 template <class T> 20 void 21 test_imp(std::true_type) 22 { 23 assert(std::isnan(std::numeric_limits<T>::quiet_NaN())); 24 assert(std::isnan(std::numeric_limits<const T>::quiet_NaN())); 25 assert(std::isnan(std::numeric_limits<volatile T>::quiet_NaN())); 26 assert(std::isnan(std::numeric_limits<const volatile T>::quiet_NaN())); 27 } 28 29 template <class T> 30 void 31 test_imp(std::false_type) 32 { 33 assert(std::numeric_limits<T>::quiet_NaN() == T()); 34 assert(std::numeric_limits<const T>::quiet_NaN() == T()); 35 assert(std::numeric_limits<volatile T>::quiet_NaN() == T()); 36 assert(std::numeric_limits<const volatile T>::quiet_NaN() == T()); 37 } 38 39 template <class T> 40 inline 41 void 42 test() 43 { 44 test_imp<T>(std::is_floating_point<T>()); 45 } 46 47 int main() 48 { 49 test<bool>(); 50 test<char>(); 51 test<signed char>(); 52 test<unsigned char>(); 53 test<wchar_t>(); 54 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 55 test<char16_t>(); 56 test<char32_t>(); 57 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS 58 test<short>(); 59 test<unsigned short>(); 60 test<int>(); 61 test<unsigned int>(); 62 test<long>(); 63 test<unsigned long>(); 64 test<long long>(); 65 test<unsigned long long>(); 66 #ifndef _LIBCPP_HAS_NO_INT128 67 test<__int128_t>(); 68 test<__uint128_t>(); 69 #endif 70 test<float>(); 71 test<double>(); 72 test<long double>(); 73 } 74
