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-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // test numeric_limits
10
11 // digits10
12
13 #include <limits>
14 #include <cfloat>
15
16 #include "test_macros.h"
17
18 template <class T, int expected>
19 void
test()20 test()
21 {
22 static_assert(std::numeric_limits<T>::digits10 == expected, "digits10 test 1");
23 static_assert(std::numeric_limits<T>::is_bounded, "digits10 test 5");
24 static_assert(std::numeric_limits<const T>::digits10 == expected, "digits10 test 2");
25 static_assert(std::numeric_limits<const T>::is_bounded, "digits10 test 6");
26 static_assert(std::numeric_limits<volatile T>::digits10 == expected, "digits10 test 3");
27 static_assert(std::numeric_limits<volatile T>::is_bounded, "digits10 test 7");
28 static_assert(std::numeric_limits<const volatile T>::digits10 == expected, "digits10 test 4");
29 static_assert(std::numeric_limits<const volatile T>::is_bounded, "digits10 test 8");
30 }
31
main(int,char **)32 int main(int, char**)
33 {
34 test<bool, 0>();
35 test<char, 2>();
36 test<signed char, 2>();
37 test<unsigned char, 2>();
38 test<wchar_t, 5*sizeof(wchar_t)/2-1>(); // 4 -> 9 and 2 -> 4
39 #if TEST_STD_VER > 17 && defined(__cpp_char8_t)
40 test<char8_t, 2>();
41 #endif
42 test<char16_t, 4>();
43 test<char32_t, 9>();
44 test<short, 4>();
45 test<unsigned short, 4>();
46 test<int, 9>();
47 test<unsigned int, 9>();
48 test<long, sizeof(long) == 4 ? 9 : 18>();
49 test<unsigned long, sizeof(long) == 4 ? 9 : 19>();
50 test<long long, 18>();
51 test<unsigned long long, 19>();
52 #ifndef TEST_HAS_NO_INT128
53 test<__int128_t, 38>();
54 test<__uint128_t, 38>();
55 #endif
56 test<float, FLT_DIG>();
57 test<double, DBL_DIG>();
58 test<long double, LDBL_DIG>();
59
60 return 0;
61 }
62