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// lowest()
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
24template <class T>
25void
26test(T expected)
27{
28 assert(std::numeric_limits<T>::lowest() == expected);
29 assert(std::numeric_limits<T>::is_bounded);
30 assert(std::numeric_limits<const T>::lowest() == expected);
31 assert(std::numeric_limits<const T>::is_bounded);
32 assert(std::numeric_limits<volatile T>::lowest() == expected);
33 assert(std::numeric_limits<volatile T>::is_bounded);
34 assert(std::numeric_limits<const volatile T>::lowest() == expected);
35 assert(std::numeric_limits<const volatile T>::is_bounded);
36}
37
38int main(int, char**)
39{
40 test<bool>(expected: false);
41 test<char>(CHAR_MIN);
42 test<signed char>(SCHAR_MIN);
43 test<unsigned char>(expected: 0);
44#ifndef TEST_HAS_NO_WIDE_CHARACTERS
45 test<wchar_t>(WCHAR_MIN);
46#endif
47#if TEST_STD_VER > 17 && defined(__cpp_char8_t)
48 test<char8_t>(0);
49#endif
50 test<char16_t>(expected: 0);
51 test<char32_t>(expected: 0);
52 test<short>(SHRT_MIN);
53 test<unsigned short>(expected: 0);
54 test<int>(INT_MIN);
55 test<unsigned int>(expected: 0);
56 test<long>(LONG_MIN);
57 test<unsigned long>(expected: 0);
58 test<long long>(LLONG_MIN);
59 test<unsigned long long>(expected: 0);
60#ifndef TEST_HAS_NO_INT128
61 test<__int128_t>(expected: -__int128_t(__uint128_t(-1)/2) - 1);
62 test<__uint128_t>(expected: 0);
63#endif
64 test<float>(expected: -FLT_MAX);
65 test<double>(expected: -DBL_MAX);
66 test<long double>(expected: -LDBL_MAX);
67
68 return 0;
69}
70

source code of libcxx/test/std/language.support/support.limits/limits/numeric.limits.members/lowest.pass.cpp