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 // epsilon() 13 14 #include <limits> 15 #include <cfloat> 16 #include <cassert> 17 18 template <class T> 19 void 20 test(T expected) 21 { 22 assert(std::numeric_limits<T>::epsilon() == expected); 23 assert(std::numeric_limits<const T>::epsilon() == expected); 24 assert(std::numeric_limits<volatile T>::epsilon() == expected); 25 assert(std::numeric_limits<const volatile T>::epsilon() == expected); 26 } 27 28 int main() 29 { 30 test<bool>(false); 31 test<char>(0); 32 test<signed char>(0); 33 test<unsigned char>(0); 34 test<wchar_t>(0); 35 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 36 test<char16_t>(0); 37 test<char32_t>(0); 38 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS 39 test<short>(0); 40 test<unsigned short>(0); 41 test<int>(0); 42 test<unsigned int>(0); 43 test<long>(0); 44 test<unsigned long>(0); 45 test<long long>(0); 46 test<unsigned long long>(0); 47 #ifndef _LIBCPP_HAS_NO_INT128 48 test<__int128_t>(0); 49 test<__uint128_t>(0); 50 #endif 51 test<float>(FLT_EPSILON); 52 test<double>(DBL_EPSILON); 53 test<long double>(LDBL_EPSILON); 54 } 55
