libcxx initial import

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8

test/utilities/function.objects/unord.hash/integral.pass.cpp

@@ -0,0 +1,57 @@
+//===----------------------------------------------------------------------===//
+//
+// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <functional>
+
+// template <class T>
+// struct hash
+//     : public unary_function<T, size_t>
+// {
+//     size_t operator()(T val) const;
+// };
+
+// Not very portable
+
+#include <functional>
+#include <cassert>
+#include <type_traits>
+#include <limits>
+
+template <class T>
+void
+test()
+{
+    static_assert((std::is_base_of<std::unary_function<T, std::size_t>,
+                                   std::hash<T> >::value), "");
+    std::hash<T> h;
+    for (int i = 0; i <= 5; ++i)
+    {
+        T t(i);
+        assert(h(t) == t);
+    }
+}
+
+int main()
+{
+    test<bool>();
+    test<char>();
+    test<signed char>();
+    test<unsigned char>();
+    test<char16_t>();
+    test<char32_t>();
+    test<wchar_t>();
+    test<short>();
+    test<unsigned short>();
+    test<int>();
+    test<unsigned int>();
+    test<long>();
+    test<unsigned long>();
+    test<long long>();
+    test<unsigned long long>();
+}