digits10.pass.cpp (2038B)
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 // digits10 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>::digits10 == expected, "digits10 test 1"); 24 static_assert(std::numeric_limits<T>::is_bounded, "digits10 test 5"); 25 static_assert(std::numeric_limits<const T>::digits10 == expected, "digits10 test 2"); 26 static_assert(std::numeric_limits<const T>::is_bounded, "digits10 test 6"); 27 static_assert(std::numeric_limits<volatile T>::digits10 == expected, "digits10 test 3"); 28 static_assert(std::numeric_limits<volatile T>::is_bounded, "digits10 test 7"); 29 static_assert(std::numeric_limits<const volatile T>::digits10 == expected, "digits10 test 4"); 30 static_assert(std::numeric_limits<const volatile T>::is_bounded, "digits10 test 8"); 31 } 32 33 int main() 34 { 35 test<bool, 0>(); 36 test<char, 2>(); 37 test<signed char, 2>(); 38 test<unsigned char, 2>(); 39 test<wchar_t, 5*sizeof(wchar_t)/2-1>(); // 4 -> 9 and 2 -> 4 40 #if TEST_STD_VER > 17 && defined(__cpp_char8_t) 41 test<char8_t, 2>(); 42 #endif 43 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 44 test<char16_t, 4>(); 45 test<char32_t, 9>(); 46 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS 47 test<short, 4>(); 48 test<unsigned short, 4>(); 49 test<int, 9>(); 50 test<unsigned int, 9>(); 51 test<long, sizeof(long) == 4 ? 9 : 18>(); 52 test<unsigned long, sizeof(long) == 4 ? 9 : 19>(); 53 test<long long, 18>(); 54 test<unsigned long long, 19>(); 55 #ifndef _LIBCPP_HAS_NO_INT128 56 test<__int128_t, 38>(); 57 test<__uint128_t, 38>(); 58 #endif 59 test<float, FLT_DIG>(); 60 test<double, DBL_DIG>(); 61 test<long double, LDBL_DIG>(); 62 }