65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// type_traits
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// make_signed
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#include <type_traits>
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enum Enum {zero, one_};
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enum BigEnum
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{
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bigzero,
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big = 0xFFFFFFFFFFFFFFFFULL
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};
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#if !defined(_LIBCPP_HAS_NO_INT128) && !defined(_LIBCPP_HAS_NO_STRONG_ENUMS)
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enum HugeEnum : __uint128_t
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{
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hugezero
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};
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#endif
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template <class T, class U>
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void test_make_signed()
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{
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static_assert((std::is_same<typename std::make_signed<T>::type, U>::value), "");
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#if _LIBCPP_STD_VER > 11
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static_assert((std::is_same<std::make_signed_t<T>, U>::value), "");
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#endif
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}
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int main()
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{
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test_make_signed< signed char, signed char >();
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test_make_signed< unsigned char, signed char >();
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test_make_signed< char, signed char >();
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test_make_signed< short, signed short >();
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test_make_signed< unsigned short, signed short >();
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test_make_signed< int, signed int >();
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test_make_signed< unsigned int, signed int >();
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test_make_signed< long, signed long >();
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test_make_signed< unsigned long, long >();
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test_make_signed< long long, signed long long >();
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test_make_signed< unsigned long long, signed long long >();
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test_make_signed< wchar_t, std::conditional<sizeof(wchar_t) == 4, int, short>::type >();
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test_make_signed< const wchar_t, std::conditional<sizeof(wchar_t) == 4, const int, const short>::type >();
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test_make_signed< const Enum, std::conditional<sizeof(Enum) == sizeof(int), const int, const signed char>::type >();
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test_make_signed< BigEnum, std::conditional<sizeof(long) == 4, long long, long>::type >();
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#ifndef _LIBCPP_HAS_NO_INT128
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test_make_signed< __int128_t, __int128_t >();
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test_make_signed< __uint128_t, __int128_t >();
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# ifndef _LIBCPP_HAS_NO_STRONG_ENUMS
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test_make_signed< HugeEnum, __int128_t >();
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# endif
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#endif
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}
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