Implement LWG3035: std::allocator's constructors should be constexpr.

llvm-svn: 328059

1 files changed, 50 insertions, 0 deletions

diff --git a/libcxx/test/std/utilities/memory/default.allocator/allocator.ctor.pass.cpp b/libcxx/test/std/utilities/memory/default.allocator/allocator.ctor.pass.cpp
new file mode 100644
index 00000000000..3841cb53368
--- /dev/null
+++ b/libcxx/test/std/utilities/memory/default.allocator/allocator.ctor.pass.cpp
@@ -0,0 +1,50 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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>
+// class allocator
+// {
+// public: // All of these are constexpr after C++17
+//  constexpr allocator() noexcept;
+//  constexpr allocator(const allocator&) noexcept;
+//  template<class U> constexpr allocator(const allocator<U>&) noexcept;
+// ...
+// };
+
+#include <memory>
+#include <cstddef>
+
+#include "test_macros.h"
+
+
+int main()
+{
+    {
+    typedef std::allocator<char> AC;
+    typedef std::allocator<long> AL;
+
+    constexpr AC a1;
+    constexpr AC a2{a1};
+    constexpr AL a3{a2};
+    (void) a3;
+    }
+    {
+    typedef std::allocator<const char> AC;
+    typedef std::allocator<const long> AL;
+
+    constexpr AC a1;
+    constexpr AC a2{a1};
+    constexpr AL a3{a2};
+    (void) a3;
+    }
+    
+}