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// type_traits
10
11// make_signed
12
13#include <type_traits>
14
15#include "test_macros.h"
16
17enum Enum {zero, one_};
18
19#if TEST_STD_VER >= 11
20enum BigEnum : unsigned long long // MSVC's ABI doesn't follow the Standard
21#else
22enum BigEnum
23#endif
24{
25 bigzero,
26 big = 0xFFFFFFFFFFFFFFFFULL
27};
28
29#if !defined(TEST_HAS_NO_INT128) && TEST_STD_VER >= 11
30enum HugeEnum : __uint128_t
31{
32 hugezero
33};
34#endif
35
36template <class T, class U>
37void test_make_signed()
38{
39 ASSERT_SAME_TYPE(U, typename std::make_signed<T>::type);
40#if TEST_STD_VER > 11
41 ASSERT_SAME_TYPE(U, std::make_signed_t<T>);
42#endif
43}
44
45int main(int, char**)
46{
47 test_make_signed< signed char, signed char >();
48 test_make_signed< unsigned char, signed char >();
49 test_make_signed< char, signed char >();
50 test_make_signed< short, signed short >();
51 test_make_signed< unsigned short, signed short >();
52 test_make_signed< int, signed int >();
53 test_make_signed< unsigned int, signed int >();
54 test_make_signed< long, signed long >();
55 test_make_signed< unsigned long, long >();
56 test_make_signed< long long, signed long long >();
57 test_make_signed< unsigned long long, signed long long >();
58 test_make_signed< wchar_t, std::conditional<sizeof(wchar_t) == 4, int, short>::type >();
59 test_make_signed< const wchar_t, std::conditional<sizeof(wchar_t) == 4, const int, const short>::type >();
60 test_make_signed< const Enum, std::conditional<sizeof(Enum) == sizeof(int), const int, const signed char>::type >();
61 test_make_signed< BigEnum, std::conditional<sizeof(long) == 4, long long, long>::type >();
62#ifndef TEST_HAS_NO_INT128
63 test_make_signed< __int128_t, __int128_t >();
64 test_make_signed< __uint128_t, __int128_t >();
65# if TEST_STD_VER >= 11
66 test_make_signed< HugeEnum, __int128_t >();
67# endif
68#endif
69
70 return 0;
71}
72

source code of libcxx/test/std/utilities/meta/meta.trans/meta.trans.sign/make_signed.pass.cpp