Merge to upstream r225300.

Change-Id: I2b23715db9ac129ff80aa78ad5824db0a4d6fbb3

test/std/utilities/tuple/tuple.tuple/tuple.cnstr/alloc.pass.cpp

@@ -0,0 +1,79 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <tuple>
+
+// template <class... Types> class tuple;
+
+// template <class Alloc>
+//   tuple(allocator_arg_t, const Alloc& a);
+
+#include <tuple>
+#include <cassert>
+
+#include "DefaultOnly.h"
+#include "allocators.h"
+#include "../alloc_first.h"
+#include "../alloc_last.h"
+
+int main()
+{
+    {
+        std::tuple<> t(std::allocator_arg, A1<int>());
+    }
+    {
+        std::tuple<int> t(std::allocator_arg, A1<int>());
+        assert(std::get<0>(t) == 0);
+    }
+    {
+        std::tuple<DefaultOnly> t(std::allocator_arg, A1<int>());
+        assert(std::get<0>(t) == DefaultOnly());
+    }
+    {
+        assert(!alloc_first::allocator_constructed);
+        std::tuple<alloc_first> t(std::allocator_arg, A1<int>(5));
+        assert(alloc_first::allocator_constructed);
+        assert(std::get<0>(t) == alloc_first());
+    }
+    {
+        assert(!alloc_last::allocator_constructed);
+        std::tuple<alloc_last> t(std::allocator_arg, A1<int>(5));
+        assert(alloc_last::allocator_constructed);
+        assert(std::get<0>(t) == alloc_last());
+    }
+    {
+        alloc_first::allocator_constructed = false;
+        std::tuple<DefaultOnly, alloc_first> t(std::allocator_arg, A1<int>(5));
+        assert(std::get<0>(t) == DefaultOnly());
+        assert(alloc_first::allocator_constructed);
+        assert(std::get<1>(t) == alloc_first());
+    }
+    {
+        alloc_first::allocator_constructed = false;
+        alloc_last::allocator_constructed = false;
+        std::tuple<DefaultOnly, alloc_first, alloc_last> t(std::allocator_arg,
+                                                           A1<int>(5));
+        assert(std::get<0>(t) == DefaultOnly());
+        assert(alloc_first::allocator_constructed);
+        assert(std::get<1>(t) == alloc_first());
+        assert(alloc_last::allocator_constructed);
+        assert(std::get<2>(t) == alloc_last());
+    }
+    {
+        alloc_first::allocator_constructed = false;
+        alloc_last::allocator_constructed = false;
+        std::tuple<DefaultOnly, alloc_first, alloc_last> t(std::allocator_arg,
+                                                           A2<int>(5));
+        assert(std::get<0>(t) == DefaultOnly());
+        assert(!alloc_first::allocator_constructed);
+        assert(std::get<1>(t) == alloc_first());
+        assert(!alloc_last::allocator_constructed);
+        assert(std::get<2>(t) == alloc_last());
+    }
+}