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// round_error()
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>::round_error() == expected);
24 assert(std::numeric_limits<const T>::round_error() == expected);
25 assert(std::numeric_limits<volatile T>::round_error() == expected);
26 assert(std::numeric_limits<const volatile T>::round_error() == 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 test<float>(0.5);
54 test<double>(0.5);
55 test<long double>(0.5);
56
57 return 0;
58}
59

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