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 // max()
12 
13 #include <limits>
14 #include <climits>
15 #include <cfloat>
16 #include <cassert>
17 
18 #include "test_macros.h"
19 
20 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
21 #   include <cwchar>
22 #endif
23 
24 template <class T>
25 void
test(T expected)26 test(T expected)
27 {
28     assert(std::numeric_limits<T>::max() == expected);
29     assert(std::numeric_limits<T>::is_bounded);
30     assert(std::numeric_limits<const T>::max() == expected);
31     assert(std::numeric_limits<const T>::is_bounded);
32     assert(std::numeric_limits<volatile T>::max() == expected);
33     assert(std::numeric_limits<volatile T>::is_bounded);
34     assert(std::numeric_limits<const volatile T>::max() == expected);
35     assert(std::numeric_limits<const volatile T>::is_bounded);
36 }
37 
main(int,char **)38 int main(int, char**)
39 {
40     test<bool>(true);
41     test<char>(CHAR_MAX);
42     test<signed char>(SCHAR_MAX);
43     test<unsigned char>(UCHAR_MAX);
44 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
45     test<wchar_t>(WCHAR_MAX);
46 #endif
47 #if TEST_STD_VER > 17 && defined(__cpp_char8_t)
48     test<char8_t>(UCHAR_MAX); // ??
49 #endif
50     test<char16_t>(USHRT_MAX);
51     test<char32_t>(UINT_MAX);
52     test<short>(SHRT_MAX);
53     test<unsigned short>(USHRT_MAX);
54     test<int>(INT_MAX);
55     test<unsigned int>(UINT_MAX);
56     test<long>(LONG_MAX);
57     test<unsigned long>(ULONG_MAX);
58     test<long long>(LLONG_MAX);
59     test<unsigned long long>(ULLONG_MAX);
60 #ifndef TEST_HAS_NO_INT128
61     test<__int128_t>(__int128_t(__uint128_t(-1)/2));
62     test<__uint128_t>(__uint128_t(-1));
63 #endif
64     test<float>(FLT_MAX);
65     test<double>(DBL_MAX);
66     test<long double>(LDBL_MAX);
67 
68   return 0;
69 }
70