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[libcxx][NFC] utilises compiler builtins for unary transform type-traits 

Depends on D116203

Reviewed By: #libc, philnik

Differential Revision: https://reviews.llvm.org/D131732
This commit is contained in:
Christopher Di Bella 2022-08-22 01:07:08 +00:00
parent e9ef45635b
commit 0e7971154e
17 changed files with 254 additions and 141 deletions
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12
libcxx/include/__type_traits/add_lvalue_reference.h
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@ -18,11 +18,21 @@
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _Tp, bool = __is_referenceable<_Tp>::value> struct __add_lvalue_reference_impl { typedef _LIBCPP_NODEBUG _Tp type; };
#if __has_builtin(__add_lvalue_reference)
template <class _Tp>
struct add_lvalue_reference {
using type _LIBCPP_NODEBUG = __add_lvalue_reference(_Tp);
};
#else
template <class _Tp, bool = __libcpp_is_referenceable<_Tp>::value>
struct __add_lvalue_reference_impl {
typedef _LIBCPP_NODEBUG _Tp type;
};
template <class _Tp > struct __add_lvalue_reference_impl<_Tp, true> { typedef _LIBCPP_NODEBUG _Tp& type; };
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_lvalue_reference
{typedef _LIBCPP_NODEBUG typename __add_lvalue_reference_impl<_Tp>::type type;};
#endif // __has_builtin(__add_lvalue_reference)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using add_lvalue_reference_t = typename add_lvalue_reference<_Tp>::type;

15
libcxx/include/__type_traits/add_pointer.h
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@ -21,16 +21,23 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__add_pointer)
template <class _Tp>
struct add_pointer {
using type _LIBCPP_NODEBUG = __add_pointer(_Tp);
};
#else
template <class _Tp,
bool = __is_referenceable<_Tp>::value ||
_IsSame<typename remove_cv<_Tp>::type, void>::value>
struct __add_pointer_impl
{typedef _LIBCPP_NODEBUG typename remove_reference<_Tp>::type* type;};
bool = __libcpp_is_referenceable<_Tp>::value || _IsSame<typename remove_cv<_Tp>::type, void>::value>
struct __add_pointer_impl {
typedef _LIBCPP_NODEBUG typename remove_reference<_Tp>::type* type;
};
template <class _Tp> struct __add_pointer_impl<_Tp, false>
{typedef _LIBCPP_NODEBUG _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_pointer
{typedef _LIBCPP_NODEBUG typename __add_pointer_impl<_Tp>::type type;};
#endif // __has_builtin(__add_pointer)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using add_pointer_t = typename add_pointer<_Tp>::type;

12
libcxx/include/__type_traits/add_rvalue_reference.h
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@ -18,11 +18,21 @@
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _Tp, bool = __is_referenceable<_Tp>::value> struct __add_rvalue_reference_impl { typedef _LIBCPP_NODEBUG _Tp type; };
#if __has_builtin(__add_rvalue_reference)
template <class _Tp>
struct add_rvalue_reference {
using type _LIBCPP_NODEBUG = __add_rvalue_reference(_Tp);
};
#else
template <class _Tp, bool = __libcpp_is_referenceable<_Tp>::value>
struct __add_rvalue_reference_impl {
typedef _LIBCPP_NODEBUG _Tp type;
};
template <class _Tp > struct __add_rvalue_reference_impl<_Tp, true> { typedef _LIBCPP_NODEBUG _Tp&& type; };
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS add_rvalue_reference
{typedef _LIBCPP_NODEBUG typename __add_rvalue_reference_impl<_Tp>::type type;};
#endif // __has_builtin(__add_rvalue_reference)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using add_rvalue_reference_t = typename add_rvalue_reference<_Tp>::type;

9
libcxx/include/__type_traits/decay.h
View File

@ -26,6 +26,12 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__decay)
template <class _Tp>
struct decay {
using type _LIBCPP_NODEBUG = __decay(_Tp);
};
#else
template <class _Up, bool>
struct __decay {
typedef _LIBCPP_NODEBUG typename remove_cv<_Up>::type type;
@ -53,8 +59,9 @@ struct _LIBCPP_TEMPLATE_VIS decay
private:
typedef _LIBCPP_NODEBUG typename remove_reference<_Tp>::type _Up;
public:
typedef _LIBCPP_NODEBUG typename __decay<_Up, __is_referenceable<_Up>::value>::type type;
typedef _LIBCPP_NODEBUG typename __decay<_Up, __libcpp_is_referenceable<_Up>::value>::type type;
};
#endif // __has_builtin(__decay)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using decay_t = typename decay<_Tp>::type;

18
libcxx/include/__type_traits/is_referenceable.h
View File

@ -19,14 +19,22 @@
_LIBCPP_BEGIN_NAMESPACE_STD
struct __is_referenceable_impl {
template <class _Tp> static _Tp& __test(int);
template <class _Tp> static false_type __test(...);
#if __has_builtin(__is_referenceable)
template <class _Tp>
struct __libcpp_is_referenceable : integral_constant<bool, __is_referenceable(_Tp)> {};
#else
struct __libcpp_is_referenceable_impl {
template <class _Tp>
static _Tp& __test(int);
template <class _Tp>
static false_type __test(...);
};
template <class _Tp>
struct __is_referenceable : integral_constant<bool,
_IsNotSame<decltype(__is_referenceable_impl::__test<_Tp>(0)), false_type>::value> {};
struct __libcpp_is_referenceable
: integral_constant<bool, _IsNotSame<decltype(__libcpp_is_referenceable_impl::__test<_Tp>(0)), false_type>::value> {
};
#endif // __has_builtin(__is_referenceable)
_LIBCPP_END_NAMESPACE_STD

4
libcxx/include/__type_traits/is_swappable.h
View File

@ -119,7 +119,7 @@ struct _LIBCPP_TEMPLATE_VIS is_swappable_with
template <class _Tp>
struct _LIBCPP_TEMPLATE_VIS is_swappable
: public conditional<
__is_referenceable<_Tp>::value,
__libcpp_is_referenceable<_Tp>::value,
is_swappable_with<
typename add_lvalue_reference<_Tp>::type,
typename add_lvalue_reference<_Tp>::type>,
@ -137,7 +137,7 @@ struct _LIBCPP_TEMPLATE_VIS is_nothrow_swappable_with
template <class _Tp>
struct _LIBCPP_TEMPLATE_VIS is_nothrow_swappable
: public conditional<
__is_referenceable<_Tp>::value,
__libcpp_is_referenceable<_Tp>::value,
is_nothrow_swappable_with<
typename add_lvalue_reference<_Tp>::type,
typename add_lvalue_reference<_Tp>::type>,

7
libcxx/include/__type_traits/make_signed.h
View File

@ -23,6 +23,12 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__make_signed)
template <class _Tp>
struct make_signed {
using type _LIBCPP_NODEBUG = __make_signed(_Tp);
};
#else
typedef
__type_list<signed char,
__type_list<signed short,
@ -66,6 +72,7 @@ struct _LIBCPP_TEMPLATE_VIS make_signed
{
typedef typename __apply_cv<_Tp, typename __make_signed<typename remove_cv<_Tp>::type>::type>::type type;
};
#endif // __has_builtin(__make_signed)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using make_signed_t = typename make_signed<_Tp>::type;

7
libcxx/include/__type_traits/make_unsigned.h
View File

@ -25,6 +25,12 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__make_unsigned)
template <class _Tp>
struct make_unsigned {
using type _LIBCPP_NODEBUG = __make_unsigned(_Tp);
};
#else
typedef
__type_list<unsigned char,
__type_list<unsigned short,
@ -68,6 +74,7 @@ struct _LIBCPP_TEMPLATE_VIS make_unsigned
{
typedef typename __apply_cv<_Tp, typename __make_unsigned<typename remove_cv<_Tp>::type>::type>::type type;
};
#endif // __has_builtin(__make_unsigned)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using make_unsigned_t = typename make_unsigned<_Tp>::type;

7
libcxx/include/__type_traits/remove_all_extents.h
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@ -18,12 +18,19 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__remove_all_extents)
template <class _Tp>
struct remove_all_extents {
using type _LIBCPP_NODEBUG = __remove_all_extents(_Tp);
};
#else
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_all_extents
{typedef _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_all_extents<_Tp[]>
{typedef typename remove_all_extents<_Tp>::type type;};
template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS remove_all_extents<_Tp[_Np]>
{typedef typename remove_all_extents<_Tp>::type type;};
#endif // __has_builtin(__remove_all_extents)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using remove_all_extents_t = typename remove_all_extents<_Tp>::type;

8
libcxx/include/__type_traits/remove_const.h
View File

@ -17,8 +17,16 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__remove_const)
template <class _Tp>
struct remove_const {
using type _LIBCPP_NODEBUG = __remove_const(_Tp);
};
#else
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_const {typedef _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_const<const _Tp> {typedef _Tp type;};
#endif // __has_builtin(__remove_const)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using remove_const_t = typename remove_const<_Tp>::type;
#endif

8
libcxx/include/__type_traits/remove_cv.h
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@ -19,8 +19,16 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__remove_cv)
template <class _Tp>
struct remove_cv {
using type _LIBCPP_NODEBUG = __remove_cv(_Tp);
};
#else
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_cv
{typedef typename remove_volatile<typename remove_const<_Tp>::type>::type type;};
#endif // __has_builtin(__remove_cv)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using remove_cv_t = typename remove_cv<_Tp>::type;
#endif

5
libcxx/include/__type_traits/remove_cvref.h
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@ -20,8 +20,13 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__remove_cvref)
template <class _Tp>
using __uncvref_t _LIBCPP_NODEBUG = __remove_cvref(_Tp);
#else
template <class _Tp>
using __uncvref_t _LIBCPP_NODEBUG = typename remove_cv<typename remove_reference<_Tp>::type>::type;
#endif // __has_builtin(__remove_cvref)
template <class _Tp, class _Up>
struct __is_same_uncvref : _IsSame<__uncvref_t<_Tp>, __uncvref_t<_Up> > {};

7
libcxx/include/__type_traits/remove_extent.h
View File

@ -18,12 +18,19 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__remove_extent)
template <class _Tp>
struct remove_extent {
using type _LIBCPP_NODEBUG = __remove_extent(_Tp);
};
#else
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_extent
{typedef _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_extent<_Tp[]>
{typedef _Tp type;};
template <class _Tp, size_t _Np> struct _LIBCPP_TEMPLATE_VIS remove_extent<_Tp[_Np]>
{typedef _Tp type;};
#endif // __has_builtin(__remove_extent)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using remove_extent_t = typename remove_extent<_Tp>::type;

7
libcxx/include/__type_traits/remove_pointer.h
View File

@ -17,11 +17,18 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__remove_pointer)
template <class _Tp>
struct remove_pointer {
using type _LIBCPP_NODEBUG = __remove_pointer(_Tp);
};
#else
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer {typedef _LIBCPP_NODEBUG _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp*> {typedef _LIBCPP_NODEBUG _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const> {typedef _LIBCPP_NODEBUG _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* volatile> {typedef _LIBCPP_NODEBUG _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_pointer<_Tp* const volatile> {typedef _LIBCPP_NODEBUG _Tp type;};
#endif // __has_builtin(__remove_pointer)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using remove_pointer_t = typename remove_pointer<_Tp>::type;

7
libcxx/include/__type_traits/remove_reference.h
View File

@ -18,9 +18,16 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__remove_reference)
template <class _Tp>
struct remove_reference {
using type _LIBCPP_NODEBUG = __remove_reference(_Tp);
};
#else
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference {typedef _LIBCPP_NODEBUG _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference<_Tp&> {typedef _LIBCPP_NODEBUG _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_reference<_Tp&&> {typedef _LIBCPP_NODEBUG _Tp type;};
#endif // __has_builtin(__remove_reference)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using remove_reference_t = typename remove_reference<_Tp>::type;

8
libcxx/include/__type_traits/remove_volatile.h
View File

@ -17,8 +17,16 @@
_LIBCPP_BEGIN_NAMESPACE_STD
#if __has_builtin(__remove_volatile)
template <class _Tp>
struct remove_volatile {
using type _LIBCPP_NODEBUG = __remove_volatile(_Tp);
};
#else
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_volatile {typedef _Tp type;};
template <class _Tp> struct _LIBCPP_TEMPLATE_VIS remove_volatile<volatile _Tp> {typedef _Tp type;};
#endif // __has_builtin(__remove_volatile)
#if _LIBCPP_STD_VER > 11
template <class _Tp> using remove_volatile_t = typename remove_volatile<_Tp>::type;
#endif

230
libcxx/test/libcxx/utilities/meta/is_referenceable.pass.cpp
View File

@ -7,7 +7,7 @@
//===----------------------------------------------------------------------===//
//
// __is_referenceable<Tp>
// __libcpp_is_referenceable<Tp>
//
// [defns.referenceable] defines "a referenceable type" as:
// An object type, a function type that does not have cv-qualifiers
@ -21,172 +21,172 @@
struct Foo {};
static_assert((!std::__is_referenceable<void>::value), "");
static_assert(( std::__is_referenceable<int>::value), "");
static_assert(( std::__is_referenceable<int[3]>::value), "");
static_assert(( std::__is_referenceable<int[]>::value), "");
static_assert(( std::__is_referenceable<int &>::value), "");
static_assert(( std::__is_referenceable<const int &>::value), "");
static_assert(( std::__is_referenceable<int *>::value), "");
static_assert(( std::__is_referenceable<const int *>::value), "");
static_assert(( std::__is_referenceable<Foo>::value), "");
static_assert(( std::__is_referenceable<const Foo>::value), "");
static_assert(( std::__is_referenceable<Foo &>::value), "");
static_assert(( std::__is_referenceable<const Foo &>::value), "");
static_assert((!std::__libcpp_is_referenceable<void>::value), "");
static_assert((std::__libcpp_is_referenceable<int>::value), "");
static_assert((std::__libcpp_is_referenceable<int[3]>::value), "");
static_assert((std::__libcpp_is_referenceable<int[]>::value), "");
static_assert((std::__libcpp_is_referenceable<int&>::value), "");
static_assert((std::__libcpp_is_referenceable<const int&>::value), "");
static_assert((std::__libcpp_is_referenceable<int*>::value), "");
static_assert((std::__libcpp_is_referenceable<const int*>::value), "");
static_assert((std::__libcpp_is_referenceable<Foo>::value), "");
static_assert((std::__libcpp_is_referenceable<const Foo>::value), "");
static_assert((std::__libcpp_is_referenceable<Foo&>::value), "");
static_assert((std::__libcpp_is_referenceable<const Foo&>::value), "");
#if TEST_STD_VER >= 11
static_assert(( std::__is_referenceable<Foo &&>::value), "");
static_assert(( std::__is_referenceable<const Foo &&>::value), "");
static_assert((std::__libcpp_is_referenceable<Foo&&>::value), "");
static_assert((std::__libcpp_is_referenceable<const Foo&&>::value), "");
#endif
static_assert(( std::__is_referenceable<int __attribute__((__vector_size__( 8)))>::value), "");
static_assert(( std::__is_referenceable<const int __attribute__((__vector_size__( 8)))>::value), "");
static_assert(( std::__is_referenceable<float __attribute__((__vector_size__(16)))>::value), "");
static_assert(( std::__is_referenceable<const float __attribute__((__vector_size__(16)))>::value), "");
static_assert((std::__libcpp_is_referenceable<int __attribute__((__vector_size__(8)))>::value), "");
static_assert((std::__libcpp_is_referenceable<const int __attribute__((__vector_size__(8)))>::value), "");
static_assert((std::__libcpp_is_referenceable<float __attribute__((__vector_size__(16)))>::value), "");
static_assert((std::__libcpp_is_referenceable<const float __attribute__((__vector_size__(16)))>::value), "");
// Functions without cv-qualifiers are referenceable
static_assert(( std::__is_referenceable<void ()>::value), "");
static_assert((std::__libcpp_is_referenceable<void()>::value), "");
#if TEST_STD_VER >= 11
static_assert((!std::__is_referenceable<void () const>::value), "");
static_assert((!std::__is_referenceable<void () &>::value), "");
static_assert((!std::__is_referenceable<void () const &>::value), "");
static_assert((!std::__is_referenceable<void () &&>::value), "");
static_assert((!std::__is_referenceable<void () const &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void() const>::value), "");
static_assert((!std::__libcpp_is_referenceable<void() &>::value), "");
static_assert((!std::__libcpp_is_referenceable<void() const&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void() &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void() const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (int)>::value), "");
static_assert((std::__libcpp_is_referenceable<void(int)>::value), "");
#if TEST_STD_VER >= 11
static_assert((!std::__is_referenceable<void (int) const>::value), "");
static_assert((!std::__is_referenceable<void (int) &>::value), "");
static_assert((!std::__is_referenceable<void (int) const &>::value), "");
static_assert((!std::__is_referenceable<void (int) &&>::value), "");
static_assert((!std::__is_referenceable<void (int) const &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int) const>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int) &>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int) const&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int) &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (int, float)>::value), "");
static_assert((std::__libcpp_is_referenceable<void(int, float)>::value), "");
#if TEST_STD_VER >= 11
static_assert((!std::__is_referenceable<void (int, float) const>::value), "");
static_assert((!std::__is_referenceable<void (int, float) &>::value), "");
static_assert((!std::__is_referenceable<void (int, float) const &>::value), "");
static_assert((!std::__is_referenceable<void (int, float) &&>::value), "");
static_assert((!std::__is_referenceable<void (int, float) const &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float) const>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float) &>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float) const&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float) &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (int, float, Foo &)>::value), "");
static_assert((std::__libcpp_is_referenceable<void(int, float, Foo&)>::value), "");
#if TEST_STD_VER >= 11
static_assert((!std::__is_referenceable<void (int, float, Foo &) const>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &) &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &) const &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &) &&>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &) const &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, Foo&) const>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, Foo&) &>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, Foo&) const&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, Foo&) &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, Foo&) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (...)>::value), "");
static_assert((std::__libcpp_is_referenceable<void(...)>::value), "");
#if TEST_STD_VER >= 11
static_assert((!std::__is_referenceable<void (...) const>::value), "");
static_assert((!std::__is_referenceable<void (...) &>::value), "");
static_assert((!std::__is_referenceable<void (...) const &>::value), "");
static_assert((!std::__is_referenceable<void (...) &&>::value), "");
static_assert((!std::__is_referenceable<void (...) const &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(...) const>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(...) &>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(...) const&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(...) &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(...) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (int, ...)>::value), "");
static_assert((std::__libcpp_is_referenceable<void(int, ...)>::value), "");
#if TEST_STD_VER >= 11
static_assert((!std::__is_referenceable<void (int, ...) const>::value), "");
static_assert((!std::__is_referenceable<void (int, ...) &>::value), "");
static_assert((!std::__is_referenceable<void (int, ...) const &>::value), "");
static_assert((!std::__is_referenceable<void (int, ...) &&>::value), "");
static_assert((!std::__is_referenceable<void (int, ...) const &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, ...) const>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, ...) &>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, ...) const&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, ...) &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, ...) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (int, float, ...)>::value), "");
static_assert((std::__libcpp_is_referenceable<void(int, float, ...)>::value), "");
#if TEST_STD_VER >= 11
static_assert((!std::__is_referenceable<void (int, float, ...) const>::value), "");
static_assert((!std::__is_referenceable<void (int, float, ...) &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, ...) const &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, ...) &&>::value), "");
static_assert((!std::__is_referenceable<void (int, float, ...) const &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, ...) const>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, ...) &>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, ...) const&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, ...) &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, ...) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (int, float, Foo &, ...)>::value), "");
static_assert((std::__libcpp_is_referenceable<void(int, float, Foo&, ...)>::value), "");
#if TEST_STD_VER >= 11
static_assert((!std::__is_referenceable<void (int, float, Foo &, ...) const>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &, ...) &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &, ...) const &>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &, ...) &&>::value), "");
static_assert((!std::__is_referenceable<void (int, float, Foo &, ...) const &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, Foo&, ...) const>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, Foo&, ...) &>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, Foo&, ...) const&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, Foo&, ...) &&>::value), "");
static_assert((!std::__libcpp_is_referenceable<void(int, float, Foo&, ...) const&&>::value), "");
#endif
// member functions with or without cv-qualifiers are referenceable
static_assert(( std::__is_referenceable<void (Foo::*)()>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)() const>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)()>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)() const>::value), "");
#if TEST_STD_VER >= 11
static_assert(( std::__is_referenceable<void (Foo::*)() &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)() const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)() &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)() const &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)() &>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)() const&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)() &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)() const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (Foo::*)(int)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int) const>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int)>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int) const>::value), "");
#if TEST_STD_VER >= 11
static_assert(( std::__is_referenceable<void (Foo::*)(int) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int) const &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int) &>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int) const&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int) &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (Foo::*)(int, float)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float) const>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float)>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float) const>::value), "");
#if TEST_STD_VER >= 11
static_assert(( std::__is_referenceable<void (Foo::*)(int, float) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float) const &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float) &>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float) const&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float) &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &) const>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&)>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&) const>::value), "");
#if TEST_STD_VER >= 11
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &) const &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&) &>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&) const&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&) &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (Foo::*)(...)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(...) const>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(...)>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(...) const>::value), "");
#if TEST_STD_VER >= 11
static_assert(( std::__is_referenceable<void (Foo::*)(...) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(...) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(...) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(...) const &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(...) &>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(...) const&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(...) &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(...) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...) const>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, ...)>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, ...) const>::value), "");
#if TEST_STD_VER >= 11
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, ...) const &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, ...) &>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, ...) const&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, ...) &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, ...) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...) const>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, ...)>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, ...) const>::value), "");
#if TEST_STD_VER >= 11
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, ...) const &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, ...) &>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, ...) const&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, ...) &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, ...) const&&>::value), "");
#endif
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...)>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...) const>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&, ...)>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&, ...) const>::value), "");
#if TEST_STD_VER >= 11
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...) &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...) const &>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...) &&>::value), "");
static_assert(( std::__is_referenceable<void (Foo::*)(int, float, Foo &, ...) const &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&, ...) &>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&, ...) const&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&, ...) &&>::value), "");
static_assert((std::__libcpp_is_referenceable<void (Foo::*)(int, float, Foo&, ...) const&&>::value), "");
#endif
int main(int, char**) {