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// type_traits
11
12// make_signed
13
14#include <type_traits>
15
16#include "test_macros.h"
17
18enum Enum {zero, one_};
19
20#if TEST_STD_VER >= 11
21enum BigEnum : unsigned long long // MSVC's ABI doesn't follow the Standard
22#else
23enum BigEnum
24#endif
25{
26    bigzero,
27    big = 0xFFFFFFFFFFFFFFFFULL
28};
29
30#if !defined(_LIBCPP_HAS_NO_INT128) && !defined(_LIBCPP_HAS_NO_STRONG_ENUMS)
31enum HugeEnum : __uint128_t
32{
33    hugezero
34};
35#endif
36
37template <class T, class U>
38void test_make_signed()
39{
40    static_assert((std::is_same<typename std::make_signed<T>::type, U>::value), "");
41#if TEST_STD_VER > 11
42    static_assert((std::is_same<std::make_signed_t<T>, U>::value), "");
43#endif
44}
45
46int main()
47{
48    test_make_signed< signed char, signed char >();
49    test_make_signed< unsigned char, signed char >();
50    test_make_signed< char, signed char >();
51    test_make_signed< short, signed short >();
52    test_make_signed< unsigned short, signed short >();
53    test_make_signed< int, signed int >();
54    test_make_signed< unsigned int, signed int >();
55    test_make_signed< long, signed long >();
56    test_make_signed< unsigned long, long >();
57    test_make_signed< long long, signed long long >();
58    test_make_signed< unsigned long long, signed long long >();
59    test_make_signed< wchar_t, std::conditional<sizeof(wchar_t) == 4, int, short>::type >();
60    test_make_signed< const wchar_t, std::conditional<sizeof(wchar_t) == 4, const int, const short>::type >();
61    test_make_signed< const Enum, std::conditional<sizeof(Enum) == sizeof(int), const int, const signed char>::type >();
62    test_make_signed< BigEnum, std::conditional<sizeof(long) == 4, long long, long>::type >();
63#ifndef _LIBCPP_HAS_NO_INT128
64    test_make_signed< __int128_t, __int128_t >();
65    test_make_signed< __uint128_t, __int128_t >();
66# ifndef _LIBCPP_HAS_NO_STRONG_ENUMS
67    test_make_signed< HugeEnum, __int128_t >();
68# endif
69#endif
70}
71