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authorEric Fiselier <eric@efcs.ca>2017-11-22 19:49:21 +0000
committerEric Fiselier <eric@efcs.ca>2017-11-22 19:49:21 +0000
commit18a268580952c47fac35e1e46bd9973058ef7352 (patch)
treea9abbd1b3fd22ce8f3f73e951812aa7d2b5a2d93 /test
parentaa0e236289a6643641c6d268deb69e0013d5112a (diff)
[libcxx] Implement std::to_address for C++20
Summary: Now implements P0653R2 - Utility to convert to raw pointer. Reviewers: mclow.lists, EricWF Reviewed By: EricWF Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D35470 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@318865 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
-rw-r--r--test/std/utilities/memory/pointer.conversion/to_address.pass.cpp120
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 000000000..64a5c73af
--- /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);
+}