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
18 enum Enum {zero, one_};
19
20 #if TEST_STD_VER >= 11
21 enum BigEnum : unsigned long long // MSVC's ABI doesn't follow the Standard
22 #else
23 enum BigEnum
24 #endif
25 {
26 bigzero,
27 big = 0xFFFFFFFFFFFFFFFFULL
28 };
29
30 #if !defined(_LIBCPP_HAS_NO_INT128) && !defined(_LIBCPP_HAS_NO_STRONG_ENUMS)
31 enum HugeEnum : __uint128_t
32 {
33 hugezero
34 };
35 #endif
36
37 template <class T, class U>
test_make_signed()38 void 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
main()46 int 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