vendor/libc++/libc++-trunk-r321017

1 files changed, 120 insertions, 0 deletions

diff --git a/test/std/utilities/memory/pointer.conversion/to_address.pass.cpp b/test/std/utilities/memory/pointer.conversion/to_address.pass.cpp
new file mode 100644
index 000000000000..64a5c73affe1
--- /dev/null
+++ b/test/std/utilities/memory/pointer.conversion/to_address.pass.cpp
@@ -0,0 +1,120 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <memory>
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
+
+// template <class T> constexpr T* to_address(T* p) noexcept;
+// template <class Ptr> auto to_address(const Ptr& p) noexcept;
+
+#include <memory>
+#include <cassert>
+#include "test_macros.h"
+
+class P1
+{
+public:
+    using element_type = int;
+
+    explicit P1(int* p)
+    : p_(p) { }
+
+    int* operator->() const noexcept
+    { return p_; }
+
+private:
+    int* p_;
+};
+
+class P2
+{
+public:
+    using element_type = int;
+
+    explicit P2(int* p)
+    : p_(p) { }
+
+    P1 operator->() const noexcept
+    { return p_; }
+
+private:
+    P1 p_;
+};
+
+class P3
+{
+public:
+    explicit P3(int* p)
+    : p_(p) { }
+
+    int* get() const noexcept
+    { return p_; }
+
+private:
+    int* p_;
+};
+
+namespace std
+{
+template<>
+struct pointer_traits<::P3>
+{
+    static int* to_address(const ::P3& p) noexcept
+    { return p.get(); }
+};
+}
+
+class P4
+{
+public:
+    explicit P4(int* p)
+    : p_(p) { }
+
+    int* operator->() const noexcept
+    { return nullptr; }
+
+    int* get() const noexcept
+    { return p_; }
+
+private:
+    int* p_;
+};
+
+namespace std
+{
+template<>
+struct pointer_traits<::P4>
+{
+    static int* to_address(const ::P4& p) noexcept
+    { return p.get(); }
+};
+}
+
+int n = 0;
+static_assert(std::to_address(&n) == &n);
+
+int main()
+{
+    int i = 0;
+    ASSERT_NOEXCEPT(std::to_address(&i));
+    assert(std::to_address(&i) == &i);
+    P1 p1(&i);
+    ASSERT_NOEXCEPT(std::to_address(p1));
+    assert(std::to_address(p1) == &i);
+    P2 p2(&i);
+    ASSERT_NOEXCEPT(std::to_address(p2));
+    assert(std::to_address(p2) == &i);
+    P3 p3(&i);
+    ASSERT_NOEXCEPT(std::to_address(p3));
+    assert(std::to_address(p3) == &i);
+    P4 p4(&i);
+    ASSERT_NOEXCEPT(std::to_address(p4));
+    assert(std::to_address(p4) == &i);
+}