Add a standard placement new operator to WTF_USE_ALLOCATOR.

third_party/WebKit/Source/wtf/VectorTest.cpp

 /*
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "wtf/Vector.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
 #include "wtf/HashSet.h"
+#include "wtf/Optional.h"
 #include "wtf/PtrUtil.h"
 #include "wtf/text/WTFString.h"
 #include <memory>
 
 namespace WTF {
 
 namespace {
 
 TEST(VectorTest, Basic)
 {
@@ skipping 641 matching lines @@
 
     // Exact match.
     Vector<int, 1> vector3(3);
     vector3 = {1, 2, 3};
     ASSERT_EQ(3u, vector3.size());
     EXPECT_EQ(1, vector3[0]);
     EXPECT_EQ(2, vector3[1]);
     EXPECT_EQ(3, vector3[2]);
 }
 
+TEST(VectorTest, Optional)
+{
+    Optional<Vector<int>> vector;
+    EXPECT_FALSE(vector);
+    vector.emplace(3);
+    EXPECT_TRUE(vector);
+    EXPECT_EQ(3u, vector->size());
+}
+
 static_assert(VectorTraits<int>::canCopyWithMemcpy, "int should be copied with memcopy.");
 static_assert(VectorTraits<char>::canCopyWithMemcpy, "char should be copied with memcpy.");
 static_assert(VectorTraits<LChar>::canCopyWithMemcpy, "LChar should be copied with memcpy.");
 static_assert(VectorTraits<UChar>::canCopyWithMemcpy, "UChar should be copied with memcpy.");
 
 class UnknownType;
 static_assert(VectorTraits<UnknownType*>::canCopyWithMemcpy, "Pointers should be copied with memcpy.");
 
 } // anonymous namespace
 
 } // namespace WTF