1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// test numeric_limits
11
12// round_error()
13
14#include <limits>
15#include <cfloat>
16#include <cassert>
17
18template <class T>
19void
20test(T expected)
21{
22    assert(std::numeric_limits<T>::round_error() == expected);
23    assert(std::numeric_limits<const T>::round_error() == expected);
24    assert(std::numeric_limits<volatile T>::round_error() == expected);
25    assert(std::numeric_limits<const volatile T>::round_error() == expected);
26}
27
28int main()
29{
30    test<bool>(false);
31    test<char>(0);
32    test<signed char>(0);
33    test<unsigned char>(0);
34    test<wchar_t>(0);
35#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
36    test<char16_t>(0);
37    test<char32_t>(0);
38#endif  // _LIBCPP_HAS_NO_UNICODE_CHARS
39    test<short>(0);
40    test<unsigned short>(0);
41    test<int>(0);
42    test<unsigned int>(0);
43    test<long>(0);
44    test<unsigned long>(0);
45    test<long long>(0);
46    test<unsigned long long>(0);
47#ifndef _LIBCPP_HAS_NO_INT128
48    test<__int128_t>(0);
49    test<__uint128_t>(0);
50#endif
51    test<float>(0.5);
52    test<double>(0.5);
53    test<long double>(0.5);
54}
55