Add test macros header to remove dependance on __config macros.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@238267 91177308-0d34-0410-b5e6-96231b3b80d8

test/support/test_macros.h

@@ -0,0 +1,83 @@
+// -*- C++ -*-
+//===---------------------------- test_macros.h ---------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SUPPORT_TEST_MACROS_HPP
+#define SUPPORT_TEST_MACROS_HPP
+
+#define TEST_CONCAT1(X, Y) X##Y
+#define TEST_CONCAT(X, Y) TEST_CONCAT1(X, Y)
+
+#ifdef __has_extension
+#define TEST_HAS_EXTENSION(X) __has_extension(X)
+#else
+#define TEST_HAS_EXTENSION(X) 0
+#endif
+
+/* Make a nice name for the standard version */
+#if  __cplusplus <= 199711L
+# define TEST_STD_VER 3
+#elif __cplusplus <= 201103L
+# define TEST_STD_VER 11
+#elif __cplusplus <= 201402L
+# define TEST_STD_VER 14
+#else
+# define TEST_STD_VER 99    // greater than current standard
+#endif
+
+/* Features that were introduced in C++11 */
+#if TEST_STD_VER >= 11
+#define TEST_HAS_RVALUE_REFERENCES
+#define TEST_HAS_VARIADIC_TEMPLATES
+#define TEST_HAS_INITIALIZER_LISTS
+#define TEST_HAS_BASIC_CONSTEXPR
+#endif
+
+/* Features that were introduced in C++14 */
+#if TEST_STD_VER >= 14
+#define TEST_HAS_EXTENDED_CONSTEXPR
+#define TEST_HAS_VARIABLE_TEMPLATES
+#endif
+
+/* Features that were introduced after C++14 */
+#if TEST_STD_VER > 14
+#endif
+
+#if TEST_HAS_EXTENSION(cxx_decltype) || TEST_STD_VER >= 11
+#define TEST_DECLTYPE(T) decltype(T)
+#else
+#define TEST_DECLTYPE(T) __typeof__(T)
+#endif
+
+#if TEST_STD_VER >= 11
+#define TEST_NOEXCEPT noexcept
+#else
+#define TEST_NOEXCEPT
+#endif
+
+#if TEST_HAS_EXTENSION(cxx_static_assert) || TEST_STD_VER >= 11
+#  define TEST_STATIC_ASSERT(Expr, Msg) static_assert(Expr, Msg)
+#else
+#  define TEST_STATIC_ASSERT(Expr, Msg)                          \
+      typedef ::test_detail::static_assert_check<sizeof(         \
+          ::test_detail::static_assert_incomplete_test<(Expr)>)> \
+    TEST_CONCAT(test_assert, __LINE__)
+#
+#endif
+
+namespace test_detail {
+
+template <bool> struct static_assert_incomplete_test;
+template <> struct static_assert_incomplete_test<true> {};
+template <unsigned> struct static_assert_check {};
+
+} // end namespace test_detail
+
+
+#endif // SUPPORT_TEST_MACROS_HPP