From 746db75f05fcc9c30da8333539a97a2cdd9ffff9 Mon Sep 17 00:00:00 2001
From: Nikolas Klauser <nikolasklauser@berlin.de>
Date: Fri, 20 Dec 2024 14:02:46 +0100
Subject: [PATCH] [libc++] Add a test to make sure the type traits derive from
 integral_constant

---
 ...ed_from_integral_constant.compile.pass.cpp | 116 ++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 libcxx/test/std/utilities/meta/derived_from_integral_constant.compile.pass.cpp

diff --git a/libcxx/test/std/utilities/meta/derived_from_integral_constant.compile.pass.cpp b/libcxx/test/std/utilities/meta/derived_from_integral_constant.compile.pass.cpp
new file mode 100644
index 0000000000000..3db7a214b27bd
--- /dev/null
+++ b/libcxx/test/std/utilities/meta/derived_from_integral_constant.compile.pass.cpp
@@ -0,0 +1,116 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++03
+
+// Check that type traits derive from integral_constant
+
+// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
+
+#include <cstddef>
+#include <type_traits>
+
+#include "test_macros.h"
+
+static_assert(std::is_base_of<std::false_type, std::is_void<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_integral<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_floating_point<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_array<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_enum<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_union<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_class<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_function<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_pointer<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_lvalue_reference<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_rvalue_reference<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_member_object_pointer<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_member_function_pointer<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_fundamental<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_arithmetic<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_scalar<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_object<int&>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_compound<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_reference<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_member_pointer<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_const<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_volatile<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_trivial<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_trivially_copyable<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_standard_layout<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_pod<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_empty<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_polymorphic<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_abstract<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_signed<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_unsigned<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_trivially_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_nothrow_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_default_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_trivially_default_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_nothrow_default_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_copy_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_trivially_copy_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_nothrow_copy_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_move_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_trivially_move_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_nothrow_move_constructible<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_assignable<int, int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_trivially_assignable<int, int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_nothrow_assignable<int, int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_copy_assignable<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_trivially_copy_assignable<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_nothrow_copy_assignable<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_move_assignable<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_trivially_move_assignable<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_nothrow_move_assignable<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_destructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_trivially_destructible<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_nothrow_destructible<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::has_virtual_destructor<int>>::value, "");
+static_assert(std::is_base_of<std::integral_constant<std::size_t, 1>, std::alignment_of<char>>::value, "");
+static_assert(std::is_base_of<std::integral_constant<std::size_t, 0>, std::rank<char>>::value, "");
+static_assert(std::is_base_of<std::integral_constant<std::size_t, 0>, std::extent<char>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_same<int, int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_base_of<int, int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_convertible<int, int>>::value, "");
+#if TEST_STD_VER <= 17
+static_assert(std::is_base_of<std::true_type, std::is_literal_type<int>>::value, "");
+#endif
+#if TEST_STD_VER >= 14
+static_assert(std::is_base_of<std::false_type, std::is_null_pointer<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_final<int>>::value, "");
+#endif
+#if TEST_STD_VER >= 17
+static_assert(std::is_base_of<std::true_type, std::has_unique_object_representations<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_aggregate<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_swappable_with<int, int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_swappable<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_nothrow_swappable_with<int, int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_nothrow_swappable<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_invocable<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_invocable_r<int, int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_nothrow_invocable<int, int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_nothrow_invocable_r<int, int>>::value, "");
+#endif
+#if TEST_STD_VER >= 20
+static_assert(std::is_base_of<std::false_type, std::is_bounded_array<int>>::value, "");
+static_assert(std::is_base_of<std::false_type, std::is_unbounded_array<int>>::value, "");
+static_assert(std::is_base_of<std::true_type, std::is_nothrow_convertible<int, int>>::value, "");
+#endif
+#if TEST_STD_VER >= 23
+#  if defined(__cpp_lib_is_implicit_lifetime) && __cpp_lib_is_implicit_lifetime >= 202302L
+static_assert(std::is_base_of<std::true_type, std::is_implicit_lifetime<int>>::value, "");
+#  endif
+static_assert(std::is_base_of<std::false_type, std::is_scoped_enum<int>>::value, "");
+#endif
+#if TEST_STD_VER >= 26
+#  if defined(__cpp_lib_is_virtual_base_of) && __cpp_lib_is_virtual_base_of >= 202406L
+static_assert(std::is_base_of<std::false_type, std::is_virtual_base_of<int, int>>::value, "");
+#  endif
+#endif