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// denorm_min()
12
13#include <limits>
14#include <cfloat>
15#include <cassert>
16
17#include "test_macros.h"
18
19template <class T>
20void
21test(T expected)
22{
23 assert(std::numeric_limits<T>::denorm_min() == expected);
24 assert(std::numeric_limits<const T>::denorm_min() == expected);
25 assert(std::numeric_limits<volatile T>::denorm_min() == expected);
26 assert(std::numeric_limits<const volatile T>::denorm_min() == expected);
27}
28
29int main(int, char**)
30{
31 test<bool>(false);
32 test<char>(0);
33 test<signed char>(0);
34 test<unsigned char>(0);
35 test<wchar_t>(0);
36#if TEST_STD_VER > 17 && defined(__cpp_char8_t)
37 test<char8_t>(0);
38#endif
39 test<char16_t>(0);
40 test<char32_t>(0);
41 test<short>(0);
42 test<unsigned short>(0);
43 test<int>(0);
44 test<unsigned int>(0);
45 test<long>(0);
46 test<unsigned long>(0);
47 test<long long>(0);
48 test<unsigned long long>(0);
49#ifndef TEST_HAS_NO_INT128
50 test<__int128_t>(0);
51 test<__uint128_t>(0);
52#endif
53#if defined(__FLT_DENORM_MIN__) // guarded because these macros are extensions.
54 test<float>(__FLT_DENORM_MIN__);
55 test<double>(__DBL_DENORM_MIN__);
56 test<long double>(__LDBL_DENORM_MIN__);
57#endif
58#if defined(FLT_TRUE_MIN) // not currently provided on linux.
59 test<float>(FLT_TRUE_MIN);
60 test<double>(DBL_TRUE_MIN);
61 test<long double>(LDBL_TRUE_MIN);
62#endif
63#if !defined(__FLT_DENORM_MIN__) && !defined(FLT_TRUE_MIN)
64#error Test has no expected values for floating point types
65#endif
66
67 return 0;
68}
69

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