58 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// test numeric_limits10 11// digits12 13#include <limits>14#include <cfloat>15 16#include "test_macros.h"17 18template <class T, int expected>19void20test()21{22 static_assert(std::numeric_limits<T>::digits == expected, "digits test 1");23 static_assert(std::numeric_limits<const T>::digits == expected, "digits test 2");24 static_assert(std::numeric_limits<volatile T>::digits == expected, "digits test 3");25 static_assert(std::numeric_limits<const volatile T>::digits == expected, "digits test 4");26}27 28int main(int, char**)29{30 test<bool, 1>();31 test<char, std::numeric_limits<char>::is_signed ? 7 : 8>();32 test<signed char, 7>();33 test<unsigned char, 8>();34 test<wchar_t, std::numeric_limits<wchar_t>::is_signed ? sizeof(wchar_t)*8-1 : sizeof(wchar_t)*8>();35#if TEST_STD_VER > 17 && defined(__cpp_char8_t)36 test<char8_t, 8>();37#endif38 test<char16_t, 16>();39 test<char32_t, 32>();40 test<short, 15>();41 test<unsigned short, 16>();42 test<int, 31>();43 test<unsigned int, 32>();44 test<long, sizeof(long) == 4 ? 31 : 63>();45 test<unsigned long, sizeof(long) == 4 ? 32 : 64>();46 test<long long, 63>();47 test<unsigned long long, 64>();48#ifndef TEST_HAS_NO_INT12849 test<__int128_t, 127>();50 test<__uint128_t, 128>();51#endif52 test<float, FLT_MANT_DIG>();53 test<double, DBL_MANT_DIG>();54 test<long double, LDBL_MANT_DIG>();55 56 return 0;57}58