vendor/libc++/libc++-release_370-r246257

1 files changed, 38 insertions, 0 deletions

diff --git a/test/std/utilities/function.objects/arithmetic.operations/negate.pass.cpp b/test/std/utilities/function.objects/arithmetic.operations/negate.pass.cpp
new file mode 100644
index 000000000000..0adac659123b
--- /dev/null
+++ b/test/std/utilities/function.objects/arithmetic.operations/negate.pass.cpp
@@ -0,0 +1,38 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <functional>
+
+// negate
+
+#include <functional>
+#include <type_traits>
+#include <cassert>
+
+int main()
+{
+    typedef std::negate<int> F;
+    const F f = F();
+    static_assert((std::is_same<F::argument_type, int>::value), "" );
+    static_assert((std::is_same<F::result_type, int>::value), "" );
+    assert(f(36) == -36);
+#if _LIBCPP_STD_VER > 11
+    typedef std::negate<> F2;
+    const F2 f2 = F2();
+    assert(f2(36) == -36);
+    assert(f2(36L) == -36);
+    assert(f2(36.0) == -36);
+
+    constexpr int foo = std::negate<int> () (3);
+    static_assert ( foo == -3, "" );
+
+    constexpr int bar = std::negate<> () (3.0);
+    static_assert ( bar == -3, "" );
+#endif
+}