epsilon.pass.cpp (1506B)
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 #include "test_macros.h" 19 20 template <class T> 21 void 22 test(T expected) 23 { 24 assert(std::numeric_limits<T>::epsilon() == expected); 25 assert(std::numeric_limits<const T>::epsilon() == expected); 26 assert(std::numeric_limits<volatile T>::epsilon() == expected); 27 assert(std::numeric_limits<const volatile T>::epsilon() == expected); 28 } 29 30 int main() 31 { 32 test<bool>(false); 33 test<char>(0); 34 test<signed char>(0); 35 test<unsigned char>(0); 36 test<wchar_t>(0); 37 #if TEST_STD_VER > 17 && defined(__cpp_char8_t) 38 test<char8_t>(0); 39 #endif 40 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 41 test<char16_t>(0); 42 test<char32_t>(0); 43 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS 44 test<short>(0); 45 test<unsigned short>(0); 46 test<int>(0); 47 test<unsigned int>(0); 48 test<long>(0); 49 test<unsigned long>(0); 50 test<long long>(0); 51 test<unsigned long long>(0); 52 #ifndef _LIBCPP_HAS_NO_INT128 53 test<__int128_t>(0); 54 test<__uint128_t>(0); 55 #endif 56 test<float>(FLT_EPSILON); 57 test<double>(DBL_EPSILON); 58 test<long double>(LDBL_EPSILON); 59 }