More of P0006R0: type traits variable aliases for C++17.

llvm-svn: 252406

27 files changed, 354 insertions, 5 deletions

diff --git a/libcxx/include/type_traits b/libcxx/include/type_traits
index 8f1dd68daa4..c5a24a47af9 100644
--- a/libcxx/include/type_traits
+++ b/libcxx/include/type_traits
@@ -1378,6 +1378,11 @@ template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY has_virtual_destructor
 
 #endif
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool has_virtual_destructor_v
+    = has_virtual_destructor<_Tp>::value;
+#endif
+
 // alignment_of
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY alignment_of
@@ -1905,12 +1910,22 @@ template <class _Tp, class _Arg>
 struct is_assignable
     : public __is_assignable_imp<_Tp, _Arg> {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp, class _Arg> _LIBCPP_CONSTEXPR bool is_assignable_v
+    = is_assignable<_Tp, _Arg>::value;
+#endif
+
 // is_copy_assignable
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_copy_assignable
     : public is_assignable<typename add_lvalue_reference<_Tp>::type,
                   typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_copy_assignable_v
+    = is_copy_assignable<_Tp>::value;
+#endif
+
 // is_move_assignable
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_move_assignable
@@ -1921,6 +1936,11 @@ template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_move_assignable
     : public is_copy_assignable<_Tp> {};
 #endif
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_move_assignable_v
+    = is_move_assignable<_Tp>::value;
+#endif
+
 // is_destructible
 
 //  if it's a reference, return true
@@ -1979,6 +1999,11 @@ template <>
 struct is_destructible<void>
     : public _VSTD::false_type {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_destructible_v
+    = is_destructible<_Tp>::value;
+#endif
+
 // move
 
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
@@ -3013,6 +3038,11 @@ struct __is_constructible2_imp<false, _Ap[], _A0, _A1>
 #endif  // _LIBCPP_HAS_NO_VARIADICS
 #endif  // __has_feature(is_constructible)
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
+template <class _Tp, class ..._Args> _LIBCPP_CONSTEXPR bool is_constructible_v
+    = is_constructible<_Tp, _Args...>::value;
+#endif
+
 // is_default_constructible
 
 template <class _Tp>
@@ -3020,6 +3050,11 @@ struct _LIBCPP_TYPE_VIS_ONLY is_default_constructible
     : public is_constructible<_Tp>
     {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_default_constructible_v
+    = is_default_constructible<_Tp>::value;
+#endif
+
 // is_copy_constructible
 
 template <class _Tp>
@@ -3027,6 +3062,11 @@ struct _LIBCPP_TYPE_VIS_ONLY is_copy_constructible
     : public is_constructible<_Tp, 
                   typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_copy_constructible_v
+    = is_copy_constructible<_Tp>::value;
+#endif
+
 // is_move_constructible
 
 template <class _Tp>
@@ -3038,6 +3078,11 @@ struct _LIBCPP_TYPE_VIS_ONLY is_move_constructible
 #endif
     {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_move_constructible_v
+    = is_move_constructible<_Tp>::value;
+#endif
+
 // is_trivially_constructible
 
 #ifndef _LIBCPP_HAS_NO_VARIADICS
@@ -3165,18 +3210,33 @@ struct _LIBCPP_TYPE_VIS_ONLY is_trivially_constructible<_Tp, _Tp&,
 
 #endif  // _LIBCPP_HAS_NO_VARIADICS
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_trivially_constructible_v
+    = is_trivially_constructible<_Tp>::value;
+#endif
+
 // is_trivially_default_constructible
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_trivially_default_constructible
     : public is_trivially_constructible<_Tp>
     {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_trivially_default_constructible_v
+    = is_trivially_default_constructible<_Tp>::value;
+#endif
+
 // is_trivially_copy_constructible
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_trivially_copy_constructible
     : public is_trivially_constructible<_Tp, typename add_lvalue_reference<const _Tp>::type>
     {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_trivially_copy_constructible_v
+    = is_trivially_copy_constructible<_Tp>::value;
+#endif
+
 // is_trivially_move_constructible
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_trivially_move_constructible
@@ -3187,6 +3247,11 @@ template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_trivially_move_constructibl
 #endif
     {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_trivially_move_constructible_v
+    = is_trivially_move_constructible<_Tp>::value;
+#endif
+
 // is_trivially_assignable
 
 #if __has_feature(is_trivially_assignable) || _GNUC_VER >= 501
@@ -3225,12 +3290,22 @@ struct is_trivially_assignable<_Tp&, _Tp&&>
 
 #endif  // !__has_feature(is_trivially_assignable)
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp, class _Arg> _LIBCPP_CONSTEXPR bool is_trivially_assignable_v
+    = is_trivially_assignable<_Tp, _Arg>::value;
+#endif
+
 // is_trivially_copy_assignable
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_trivially_copy_assignable
     : public is_trivially_assignable<typename add_lvalue_reference<_Tp>::type,
                   typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_trivially_copy_assignable_v
+    = is_trivially_copy_assignable<_Tp>::value;
+#endif
+
 // is_trivially_move_assignable
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_trivially_move_assignable
@@ -3242,6 +3317,11 @@ template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_trivially_move_assignable
 #endif
     {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_trivially_move_assignable_v
+    = is_trivially_move_assignable<_Tp>::value;
+#endif
+
 // is_trivially_destructible
 
 #if __has_feature(has_trivial_destructor) || (_GNUC_VER >= 403)
@@ -3263,6 +3343,11 @@ template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_trivially_destructible<_Tp[
 
 #endif
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_trivially_destructible_v
+    = is_trivially_destructible<_Tp>::value;
+#endif
+
 // is_nothrow_constructible
 
 #if 0
@@ -3423,18 +3508,33 @@ struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_constructible<_Tp, _Tp&,
 #endif  // _LIBCPP_HAS_NO_VARIADICS
 #endif  // __has_feature(is_nothrow_constructible)
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
+template <class _Tp, class ..._Args> _LIBCPP_CONSTEXPR bool is_nothrow_constructible_v
+    = is_nothrow_constructible<_Tp, _Args...>::value;
+#endif
+
 // is_nothrow_default_constructible
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_default_constructible
     : public is_nothrow_constructible<_Tp>
     {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_nothrow_default_constructible_v
+    = is_nothrow_default_constructible<_Tp>::value;
+#endif
+
 // is_nothrow_copy_constructible
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_copy_constructible
     : public is_nothrow_constructible<_Tp,
                   typename add_lvalue_reference<typename add_const<_Tp>::type>::type> {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_nothrow_copy_constructible_v
+    = is_nothrow_copy_constructible<_Tp>::value;
+#endif
+
 // is_nothrow_move_constructible
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_move_constructible
@@ -3445,6 +3545,11 @@ template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_move_constructible
 #endif
     {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_nothrow_move_constructible_v
+    = is_nothrow_move_constructible<_Tp>::value;
+#endif
+
 // is_nothrow_assignable
 
 #if __has_feature(cxx_noexcept) || (_GNUC_VER >= 407 && __cplusplus >= 201103L)
@@ -3513,6 +3618,11 @@ struct is_nothrow_assignable<_Tp&, _Tp&&>
 
 #endif  // __has_feature(cxx_noexcept)
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp, class _Arg> _LIBCPP_CONSTEXPR bool is_nothrow_assignable_v
+    = is_nothrow_assignable<_Tp, _Arg>::value;
+#endif
+
 // is_nothrow_copy_assignable
 
 template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_copy_assignable
@@ -3530,6 +3640,11 @@ template <class _Tp> struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_move_assignable
 #endif
     {};
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_nothrow_copy_assignable_v
+    = is_nothrow_copy_assignable<_Tp>::value;
+#endif
+
 // is_nothrow_destructible
 
 #if __has_feature(cxx_noexcept) || (_GNUC_VER >= 407 && __cplusplus >= 201103L)
@@ -3591,6 +3706,11 @@ struct _LIBCPP_TYPE_VIS_ONLY is_nothrow_destructible<_Tp[]>
 
 #endif
 
+#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_VARIABLE_TEMPLATES)
+template <class _Tp> _LIBCPP_CONSTEXPR bool is_nothrow_destructible_v
+    = is_nothrow_destructible<_Tp>::value;
+#endif
+
 // is_pod
 
 #if __has_feature(is_pod) || (_GNUC_VER >= 403)
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/has_virtual_destructor.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/has_virtual_destructor.pass.cpp
index 685d30de692..36020139ec5 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/has_virtual_destructor.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/has_virtual_destructor.pass.cpp
@@ -20,6 +20,12 @@ void test_has_virtual_destructor()
     static_assert( std::has_virtual_destructor<const T>::value, "");
     static_assert( std::has_virtual_destructor<volatile T>::value, "");
     static_assert( std::has_virtual_destructor<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::has_virtual_destructor_v<T>, "");
+    static_assert( std::has_virtual_destructor_v<const T>, "");
+    static_assert( std::has_virtual_destructor_v<volatile T>, "");
+    static_assert( std::has_virtual_destructor_v<const volatile T>, "");
+#endif
 }
 
 template <class T>
@@ -29,6 +35,12 @@ void test_has_not_virtual_destructor()
     static_assert(!std::has_virtual_destructor<const T>::value, "");
     static_assert(!std::has_virtual_destructor<volatile T>::value, "");
     static_assert(!std::has_virtual_destructor<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::has_virtual_destructor_v<T>, "");
+    static_assert(!std::has_virtual_destructor_v<const T>, "");
+    static_assert(!std::has_virtual_destructor_v<volatile T>, "");
+    static_assert(!std::has_virtual_destructor_v<const volatile T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_assignable.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_assignable.pass.cpp
index d33019bcba9..fbe36618aac 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_assignable.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_assignable.pass.cpp
@@ -26,12 +26,18 @@ template <class T, class U>
 void test_is_assignable()
 {
     static_assert(( std::is_assignable<T, U>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(  std::is_assignable_v<T, U>, "");
+#endif
 }
 
 template <class T, class U>
 void test_is_not_assignable()
 {
     static_assert((!std::is_assignable<T, U>::value), "");
+#if TEST_STD_VER > 14
+    static_assert( !std::is_assignable_v<T, U>, "");
+#endif
 }
 
 struct D;
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_constructible.pass.cpp
index 2b8f7efec60..606cd974c47 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_constructible.pass.cpp
@@ -38,30 +38,45 @@ template <class T>
 void test_is_constructible()
 {
     static_assert( (std::is_constructible<T>::value), "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_constructible_v<T>, "");
+#endif
 }
 
 template <class T, class A0>
 void test_is_constructible()
 {
-    static_assert( (std::is_constructible<T, A0>::value), "");
+    static_assert(( std::is_constructible<T, A0>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(( std::is_constructible_v<T, A0>), "");
+#endif
 }
 
 template <class T, class A0, class A1>
 void test_is_constructible()
 {
-    static_assert( (std::is_constructible<T, A0, A1>::value), "");
+    static_assert(( std::is_constructible<T, A0, A1>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(( std::is_constructible_v<T, A0, A1>), "");
+#endif
 }
 
 template <class T>
 void test_is_not_constructible()
 {
     static_assert((!std::is_constructible<T>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_constructible_v<T>), "");
+#endif
 }
 
 template <class T, class A0>
 void test_is_not_constructible()
 {
     static_assert((!std::is_constructible<T, A0>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_constructible_v<T, A0>), "");
+#endif
 }
 
 int main()
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_copy_assignable.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_copy_assignable.pass.cpp
index c43d59479fb..904e8513fc4 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_copy_assignable.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_copy_assignable.pass.cpp
@@ -17,12 +17,18 @@ template <class T>
 void test_is_copy_assignable()
 {
     static_assert(( std::is_copy_assignable<T>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(( std::is_copy_assignable_v<T>), "");
+#endif
 }
 
 template <class T>
 void test_is_not_copy_assignable()
 {
     static_assert((!std::is_copy_assignable<T>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_copy_assignable_v<T>), "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_copy_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_copy_constructible.pass.cpp
index f878a50c3af..5d684961a6b 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_copy_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_copy_constructible.pass.cpp
@@ -17,12 +17,18 @@ template <class T>
 void test_is_copy_constructible()
 {
     static_assert( std::is_copy_constructible<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_copy_constructible_v<T>, "");
+#endif
 }
 
 template <class T>
 void test_is_not_copy_constructible()
 {
     static_assert(!std::is_copy_constructible<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_copy_constructible_v<T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_default_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_default_constructible.pass.cpp
index c8d5c42fbf8..b0d6b0370e3 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_default_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_default_constructible.pass.cpp
@@ -20,6 +20,12 @@ void test_is_default_constructible()
     static_assert( std::is_default_constructible<const T>::value, "");
     static_assert( std::is_default_constructible<volatile T>::value, "");
     static_assert( std::is_default_constructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_default_constructible_v<T>, "");
+    static_assert( std::is_default_constructible_v<const T>, "");
+    static_assert( std::is_default_constructible_v<volatile T>, "");
+    static_assert( std::is_default_constructible_v<const volatile T>, "");
+#endif
 }
 
 template <class T>
@@ -29,6 +35,12 @@ void test_is_not_default_constructible()
     static_assert(!std::is_default_constructible<const T>::value, "");
     static_assert(!std::is_default_constructible<volatile T>::value, "");
     static_assert(!std::is_default_constructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_default_constructible_v<T>, "");
+    static_assert(!std::is_default_constructible_v<const T>, "");
+    static_assert(!std::is_default_constructible_v<volatile T>, "");
+    static_assert(!std::is_default_constructible_v<const volatile T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_destructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_destructible.pass.cpp
index fae9557dbe3..772d3eabb9d 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_destructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_destructible.pass.cpp
@@ -22,6 +22,12 @@ void test_is_destructible()
     static_assert( std::is_destructible<const T>::value, "");
     static_assert( std::is_destructible<volatile T>::value, "");
     static_assert( std::is_destructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_destructible_v<T>, "");
+    static_assert( std::is_destructible_v<const T>, "");
+    static_assert( std::is_destructible_v<volatile T>, "");
+    static_assert( std::is_destructible_v<const volatile T>, "");
+#endif
 }
 
 template <class T>
@@ -31,6 +37,12 @@ void test_is_not_destructible()
     static_assert(!std::is_destructible<const T>::value, "");
     static_assert(!std::is_destructible<volatile T>::value, "");
     static_assert(!std::is_destructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_destructible_v<T>, "");
+    static_assert(!std::is_destructible_v<const T>, "");
+    static_assert(!std::is_destructible_v<volatile T>, "");
+    static_assert(!std::is_destructible_v<const volatile T>, "");
+#endif
 }
 
 class Empty {};
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_literal_type.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_literal_type.pass.cpp
index 3b55c05958d..d7b7f16cbe0 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_literal_type.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_literal_type.pass.cpp
@@ -79,7 +79,7 @@ int main()
 // In C++14, cv-void is is a literal type
 #if TEST_STD_VER < 14
     test_is_not_literal_type<void>();
-#else TEST_STD_VER > 14
+#elif TEST_STD_VER > 14
     test_is_literal_type<void>();
 #endif
 
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_move_assignable.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_move_assignable.pass.cpp
index a89ee7d4e49..78e27368c62 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_move_assignable.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_move_assignable.pass.cpp
@@ -16,13 +16,19 @@
 template <class T>
 void test_is_move_assignable()
 {
-    static_assert( std::is_move_assignable<T>::value, "");
+    static_assert(( std::is_move_assignable<T>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(( std::is_move_assignable_v<T>), "");
+#endif
 }
 
 template <class T>
 void test_is_not_move_assignable()
 {
-    static_assert(!std::is_move_assignable<T>::value, "");
+    static_assert((!std::is_move_assignable<T>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_move_assignable_v<T>), "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_move_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_move_constructible.pass.cpp
index 7409ebaa56c..0609db7e845 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_move_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_move_constructible.pass.cpp
@@ -17,12 +17,18 @@ template <class T>
 void test_is_move_constructible()
 {
     static_assert( std::is_move_constructible<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_move_constructible_v<T>, "");
+#endif
 }
 
 template <class T>
 void test_is_not_move_constructible()
 {
     static_assert(!std::is_move_constructible<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_move_constructible_v<T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_assignable.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_assignable.pass.cpp
index 8fff5f8b3de..9bd1b09f26e 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_assignable.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_assignable.pass.cpp
@@ -17,12 +17,18 @@ template <class T, class U>
 void test_is_nothrow_assignable()
 {
     static_assert(( std::is_nothrow_assignable<T, U>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(( std::is_nothrow_assignable_v<T, U>), "");
+#endif
 }
 
 template <class T, class U>
 void test_is_not_nothrow_assignable()
 {
     static_assert((!std::is_nothrow_assignable<T, U>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_nothrow_assignable_v<T, U>), "");
+#endif
 }
 
 struct A
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_constructible.pass.cpp
index fe0b5673bc4..f2c1d662698 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_constructible.pass.cpp
@@ -18,30 +18,45 @@ template <class T>
 void test_is_nothrow_constructible()
 {
     static_assert(( std::is_nothrow_constructible<T>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(( std::is_nothrow_constructible_v<T>), "");
+#endif
 }
 
 template <class T, class A0>
 void test_is_nothrow_constructible()
 {
     static_assert(( std::is_nothrow_constructible<T, A0>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(( std::is_nothrow_constructible_v<T, A0>), "");
+#endif
 }
 
 template <class T>
 void test_is_not_nothrow_constructible()
 {
     static_assert((!std::is_nothrow_constructible<T>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_nothrow_constructible_v<T>), "");
+#endif
 }
 
 template <class T, class A0>
 void test_is_not_nothrow_constructible()
 {
     static_assert((!std::is_nothrow_constructible<T, A0>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_nothrow_constructible_v<T, A0>), "");
+#endif
 }
 
 template <class T, class A0, class A1>
 void test_is_not_nothrow_constructible()
 {
     static_assert((!std::is_nothrow_constructible<T, A0, A1>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_nothrow_constructible_v<T, A0, A1>), "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_copy_assignable.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_copy_assignable.pass.cpp
index d843803cf21..85e5e4f1d6e 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_copy_assignable.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_copy_assignable.pass.cpp
@@ -17,12 +17,18 @@ template <class T>
 void test_has_nothrow_assign()
 {
     static_assert( std::is_nothrow_copy_assignable<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_nothrow_copy_assignable_v<T>, "");
+#endif
 }
 
 template <class T>
 void test_has_not_nothrow_assign()
 {
     static_assert(!std::is_nothrow_copy_assignable<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_nothrow_copy_assignable_v<T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_copy_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_copy_constructible.pass.cpp
index 99fce65dcc7..7070c59e399 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_copy_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_copy_constructible.pass.cpp
@@ -18,6 +18,10 @@ void test_is_nothrow_copy_constructible()
 {
     static_assert( std::is_nothrow_copy_constructible<T>::value, "");
     static_assert( std::is_nothrow_copy_constructible<const T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_nothrow_copy_constructible_v<T>, "");
+    static_assert( std::is_nothrow_copy_constructible_v<const T>, "");
+#endif
 }
 
 template <class T>
@@ -27,6 +31,12 @@ void test_has_not_nothrow_copy_constructor()
     static_assert(!std::is_nothrow_copy_constructible<const T>::value, "");
     static_assert(!std::is_nothrow_copy_constructible<volatile T>::value, "");
     static_assert(!std::is_nothrow_copy_constructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_nothrow_copy_constructible_v<T>, "");
+    static_assert(!std::is_nothrow_copy_constructible_v<const T>, "");
+    static_assert(!std::is_nothrow_copy_constructible_v<volatile T>, "");
+    static_assert(!std::is_nothrow_copy_constructible_v<const volatile T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_default_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_default_constructible.pass.cpp
index 1550dff08bb..e6612753237 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_default_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_default_constructible.pass.cpp
@@ -20,6 +20,12 @@ void test_is_nothrow_default_constructible()
     static_assert( std::is_nothrow_default_constructible<const T>::value, "");
     static_assert( std::is_nothrow_default_constructible<volatile T>::value, "");
     static_assert( std::is_nothrow_default_constructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_nothrow_default_constructible_v<T>, "");
+    static_assert( std::is_nothrow_default_constructible_v<const T>, "");
+    static_assert( std::is_nothrow_default_constructible_v<volatile T>, "");
+    static_assert( std::is_nothrow_default_constructible_v<const volatile T>, "");
+#endif
 }
 
 template <class T>
@@ -29,6 +35,12 @@ void test_has_not_nothrow_default_constructor()
     static_assert(!std::is_nothrow_default_constructible<const T>::value, "");
     static_assert(!std::is_nothrow_default_constructible<volatile T>::value, "");
     static_assert(!std::is_nothrow_default_constructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_nothrow_default_constructible_v<T>, "");
+    static_assert(!std::is_nothrow_default_constructible_v<const T>, "");
+    static_assert(!std::is_nothrow_default_constructible_v<volatile T>, "");
+    static_assert(!std::is_nothrow_default_constructible_v<const volatile T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_destructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_destructible.pass.cpp
index 5827c927f11..6f96d7327b4 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_destructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_destructible.pass.cpp
@@ -22,6 +22,12 @@ void test_is_nothrow_destructible()
     static_assert( std::is_nothrow_destructible<const T>::value, "");
     static_assert( std::is_nothrow_destructible<volatile T>::value, "");
     static_assert( std::is_nothrow_destructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_nothrow_destructible_v<T>, "");
+    static_assert( std::is_nothrow_destructible_v<const T>, "");
+    static_assert( std::is_nothrow_destructible_v<volatile T>, "");
+    static_assert( std::is_nothrow_destructible_v<const volatile T>, "");
+#endif
 }
 
 template <class T>
@@ -31,6 +37,12 @@ void test_is_not_nothrow_destructible()
     static_assert(!std::is_nothrow_destructible<const T>::value, "");
     static_assert(!std::is_nothrow_destructible<volatile T>::value, "");
     static_assert(!std::is_nothrow_destructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_nothrow_destructible_v<T>, "");
+    static_assert(!std::is_nothrow_destructible_v<const T>, "");
+    static_assert(!std::is_nothrow_destructible_v<volatile T>, "");
+    static_assert(!std::is_nothrow_destructible_v<const volatile T>, "");
+#endif
 }
 
 
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_move_assignable.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_move_assignable.pass.cpp
index fe51e438864..ee0ba7d577f 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_move_assignable.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_move_assignable.pass.cpp
@@ -17,12 +17,18 @@ template <class T>
 void test_has_nothrow_assign()
 {
     static_assert( std::is_nothrow_move_assignable<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_nothrow_move_assignable_v<T>, "");
+#endif
 }
 
 template <class T>
 void test_has_not_nothrow_assign()
 {
     static_assert(!std::is_nothrow_move_assignable<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_nothrow_move_assignable_v<T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_move_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_move_constructible.pass.cpp
index f5a42afe0d5..3686af729a6 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_move_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_move_constructible.pass.cpp
@@ -18,6 +18,10 @@ void test_is_nothrow_move_constructible()
 {
     static_assert( std::is_nothrow_move_constructible<T>::value, "");
     static_assert( std::is_nothrow_move_constructible<const T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_nothrow_move_constructible_v<T>, "");
+    static_assert( std::is_nothrow_move_constructible_v<const T>, "");
+#endif
 }
 
 template <class T>
@@ -27,6 +31,12 @@ void test_has_not_nothrow_move_constructor()
     static_assert(!std::is_nothrow_move_constructible<const T>::value, "");
     static_assert(!std::is_nothrow_move_constructible<volatile T>::value, "");
     static_assert(!std::is_nothrow_move_constructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_nothrow_move_constructible_v<T>, "");
+    static_assert(!std::is_nothrow_move_constructible_v<const T>, "");
+    static_assert(!std::is_nothrow_move_constructible_v<volatile T>, "");
+    static_assert(!std::is_nothrow_move_constructible_v<const volatile T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_assignable.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_assignable.pass.cpp
index 735d05fa6ee..3b89cf89bc1 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_assignable.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_assignable.pass.cpp
@@ -17,12 +17,18 @@ template <class T, class U>
 void test_is_trivially_assignable()
 {
     static_assert(( std::is_trivially_assignable<T, U>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(( std::is_trivially_assignable_v<T, U>), "");
+#endif
 }
 
 template <class T, class U>
 void test_is_not_trivially_assignable()
 {
     static_assert((!std::is_trivially_assignable<T, U>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_trivially_assignable_v<T, U>), "");
+#endif
 }
 
 struct A
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_constructible.pass.cpp
index 4171d4d32f5..b15ae744fc1 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_constructible.pass.cpp
@@ -18,30 +18,45 @@ template <class T>
 void test_is_trivially_constructible()
 {
     static_assert(( std::is_trivially_constructible<T>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(( std::is_trivially_constructible_v<T>), "");
+#endif
 }
 
 template <class T, class A0>
 void test_is_trivially_constructible()
 {
     static_assert(( std::is_trivially_constructible<T, A0>::value), "");
+#if TEST_STD_VER > 14
+    static_assert(( std::is_trivially_constructible_v<T, A0>), "");
+#endif
 }
 
 template <class T>
 void test_is_not_trivially_constructible()
 {
     static_assert((!std::is_trivially_constructible<T>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_trivially_constructible_v<T>), "");
+#endif
 }
 
 template <class T, class A0>
 void test_is_not_trivially_constructible()
 {
     static_assert((!std::is_trivially_constructible<T, A0>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_trivially_constructible_v<T, A0>), "");
+#endif
 }
 
 template <class T, class A0, class A1>
 void test_is_not_trivially_constructible()
 {
     static_assert((!std::is_trivially_constructible<T, A0, A1>::value), "");
+#if TEST_STD_VER > 14
+    static_assert((!std::is_trivially_constructible_v<T, A0, A1>), "");
+#endif
 }
 
 struct A
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_copy_assignable.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_copy_assignable.pass.cpp
index 7d72565e40c..a7487b23339 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_copy_assignable.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_copy_assignable.pass.cpp
@@ -17,12 +17,18 @@ template <class T>
 void test_has_trivially_copy_assignable()
 {
     static_assert( std::is_trivially_copy_assignable<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_trivially_copy_assignable_v<T>, "");
+#endif
 }
 
 template <class T>
 void test_has_not_trivially_copy_assignable()
 {
     static_assert(!std::is_trivially_copy_assignable<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_trivially_copy_assignable_v<T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_copy_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_copy_constructible.pass.cpp
index 6bd78ec9e7a..53259f82803 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_copy_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_copy_constructible.pass.cpp
@@ -18,6 +18,10 @@ void test_is_trivially_copy_constructible()
 {
     static_assert( std::is_trivially_copy_constructible<T>::value, "");
     static_assert( std::is_trivially_copy_constructible<const T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_trivially_copy_constructible_v<T>, "");
+    static_assert( std::is_trivially_copy_constructible_v<const T>, "");
+#endif
 }
 
 template <class T>
@@ -25,6 +29,10 @@ void test_has_not_trivial_copy_constructor()
 {
     static_assert(!std::is_trivially_copy_constructible<T>::value, "");
     static_assert(!std::is_trivially_copy_constructible<const T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_trivially_copy_constructible_v<T>, "");
+    static_assert(!std::is_trivially_copy_constructible_v<const T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_default_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_default_constructible.pass.cpp
index 1f63401dacb..5d379e47cb2 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_default_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_default_constructible.pass.cpp
@@ -20,6 +20,12 @@ void test_is_trivially_default_constructible()
     static_assert( std::is_trivially_default_constructible<const T>::value, "");
     static_assert( std::is_trivially_default_constructible<volatile T>::value, "");
     static_assert( std::is_trivially_default_constructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_trivially_default_constructible_v<T>, "");
+    static_assert( std::is_trivially_default_constructible_v<const T>, "");
+    static_assert( std::is_trivially_default_constructible_v<volatile T>, "");
+    static_assert( std::is_trivially_default_constructible_v<const volatile T>, "");
+#endif
 }
 
 template <class T>
@@ -29,6 +35,12 @@ void test_has_not_trivial_default_constructor()
     static_assert(!std::is_trivially_default_constructible<const T>::value, "");
     static_assert(!std::is_trivially_default_constructible<volatile T>::value, "");
     static_assert(!std::is_trivially_default_constructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_trivially_default_constructible_v<T>, "");
+    static_assert(!std::is_trivially_default_constructible_v<const T>, "");
+    static_assert(!std::is_trivially_default_constructible_v<volatile T>, "");
+    static_assert(!std::is_trivially_default_constructible_v<const volatile T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_destructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_destructible.pass.cpp
index 0908f8b2b42..a0c09d2221e 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_destructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_destructible.pass.cpp
@@ -22,6 +22,12 @@ void test_is_trivially_destructible()
     static_assert( std::is_trivially_destructible<const T>::value, "");
     static_assert( std::is_trivially_destructible<volatile T>::value, "");
     static_assert( std::is_trivially_destructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_trivially_destructible_v<T>, "");
+    static_assert( std::is_trivially_destructible_v<const T>, "");
+    static_assert( std::is_trivially_destructible_v<volatile T>, "");
+    static_assert( std::is_trivially_destructible_v<const volatile T>, "");
+#endif
 }
 
 template <class T>
@@ -31,6 +37,12 @@ void test_is_not_trivially_destructible()
     static_assert(!std::is_trivially_destructible<const T>::value, "");
     static_assert(!std::is_trivially_destructible<volatile T>::value, "");
     static_assert(!std::is_trivially_destructible<const volatile T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_trivially_destructible_v<T>, "");
+    static_assert(!std::is_trivially_destructible_v<const T>, "");
+    static_assert(!std::is_trivially_destructible_v<volatile T>, "");
+    static_assert(!std::is_trivially_destructible_v<const volatile T>, "");
+#endif
 }
 
 struct PublicDestructor           { public:     ~PublicDestructor() {}};
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_move_assignable.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_move_assignable.pass.cpp
index c3fc7ac0a3d..8f00da99928 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_move_assignable.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_move_assignable.pass.cpp
@@ -17,12 +17,18 @@ template <class T>
 void test_has_trivial_assign()
 {
     static_assert( std::is_trivially_move_assignable<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_trivially_move_assignable_v<T>, "");
+#endif
 }
 
 template <class T>
 void test_has_not_trivial_assign()
 {
     static_assert(!std::is_trivially_move_assignable<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_trivially_move_assignable_v<T>, "");
+#endif
 }
 
 class Empty
diff --git a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_move_constructible.pass.cpp b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_move_constructible.pass.cpp
index 54cb5e853a8..477085dcb77 100644
--- a/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_move_constructible.pass.cpp
+++ b/libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_move_constructible.pass.cpp
@@ -17,12 +17,18 @@ template <class T>
 void test_is_trivially_move_constructible()
 {
     static_assert( std::is_trivially_move_constructible<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert( std::is_trivially_move_constructible_v<T>, "");
+#endif
 }
 
 template <class T>
 void test_has_not_trivial_move_constructor()
 {
     static_assert(!std::is_trivially_move_constructible<T>::value, "");
+#if TEST_STD_VER > 14
+    static_assert(!std::is_trivially_move_constructible_v<T>, "");
+#endif
 }
 
 class Empty