libcxx initial import

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

test/language.support/support.limits/limits/numeric.limits.members/signaling_NaN.pass.cpp

@@ -0,0 +1,69 @@
+//===----------------------------------------------------------------------===//
+//
+// <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.
+//
+//===----------------------------------------------------------------------===//
+
+// test numeric_limits
+
+// signaling_NaN()
+
+#include <limits>
+#include <cmath>
+#include <type_traits>
+#include <cassert>
+
+template <class T>
+void
+test_imp(std::true_type)
+{
+    assert(std::isnan(std::numeric_limits<T>::signaling_NaN()));
+    assert(std::isnan(std::numeric_limits<const T>::signaling_NaN()));
+    assert(std::isnan(std::numeric_limits<volatile T>::signaling_NaN()));
+    assert(std::isnan(std::numeric_limits<const volatile T>::signaling_NaN()));
+}
+
+template <class T>
+void
+test_imp(std::false_type)
+{
+    assert(std::numeric_limits<T>::signaling_NaN() == T());
+    assert(std::numeric_limits<const T>::signaling_NaN() == T());
+    assert(std::numeric_limits<volatile T>::signaling_NaN() == T());
+    assert(std::numeric_limits<const volatile T>::signaling_NaN() == T());
+}
+
+template <class T>
+inline
+void
+test()
+{
+    test_imp<T>(std::is_floating_point<T>());
+}
+
+int main()
+{
+    test<bool>();
+    test<char>();
+    test<signed char>();
+    test<unsigned char>();
+    test<wchar_t>();
+#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
+    test<char16_t>();
+    test<char32_t>();
+#endif
+    test<short>();
+    test<unsigned short>();
+    test<int>();
+    test<unsigned int>();
+    test<long>();
+    test<unsigned long>();
+    test<long long>();
+    test<unsigned long long>();
+    test<float>();
+    test<double>();
+    test<long double>();
+}