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 // digits 13 14 #include <limits> 15 #include <cfloat> 16 17 #include "test_macros.h" 18 19 template <class T, int expected> 20 void 21 test() 22 { 23 static_assert(std::numeric_limits<T>::digits == expected, "digits test 1"); 24 static_assert(std::numeric_limits<const T>::digits == expected, "digits test 2"); 25 static_assert(std::numeric_limits<volatile T>::digits == expected, "digits test 3"); 26 static_assert(std::numeric_limits<const volatile T>::digits == expected, "digits test 4"); 27 } 28 29 int main() 30 { 31 test<bool, 1>(); 32 test<char, std::numeric_limits<char>::is_signed ? 7 : 8>(); 33 test<signed char, 7>(); 34 test<unsigned char, 8>(); 35 test<wchar_t, std::numeric_limits<wchar_t>::is_signed ? sizeof(wchar_t)*8-1 : sizeof(wchar_t)*8>(); 36 #if TEST_STD_VER > 17 && defined(__cpp_char8_t) 37 test<char8_t, 8>(); 38 #endif 39 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 40 test<char16_t, 16>(); 41 test<char32_t, 32>(); 42 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS 43 test<short, 15>(); 44 test<unsigned short, 16>(); 45 test<int, 31>(); 46 test<unsigned int, 32>(); 47 test<long, sizeof(long) == 4 ? 31 : 63>(); 48 test<unsigned long, sizeof(long) == 4 ? 32 : 64>(); 49 test<long long, 63>(); 50 test<unsigned long long, 64>(); 51 #ifndef _LIBCPP_HAS_NO_INT128 52 test<__int128_t, 127>(); 53 test<__uint128_t, 128>(); 54 #endif 55 test<float, FLT_MANT_DIG>(); 56 test<double, DBL_MANT_DIG>(); 57 test<long double, LDBL_MANT_DIG>(); 58 } 59
