Introduce subclass wrappers for STL containers that make them a lot easier

src/zone-containers.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ZONE_CONTAINERS_H_
 #define V8_ZONE_CONTAINERS_H_
 
+#include <deque>
+#include <queue>
 #include <vector>
 
 #include "src/zone-allocator.h"
 
 namespace v8 {
 namespace internal {
 
-typedef std::vector<bool, ZoneBoolAllocator> BoolVector;
+// A wrapper subclass for std::vector to make it easy to construct one
+// that uses a zone allocator.
+template <typename T>
+class ZoneVector : public std::vector<T, zone_allocator<T>> {
+ public:
+  // Constructs an empty vector.
+  explicit ZoneVector(Zone* zone)
+      : std::vector<T, zone_allocator<T>>(zone_allocator<T>(zone)) {}
 
-typedef std::vector<int, ZoneIntAllocator> IntVector;
-typedef IntVector::iterator IntVectorIter;
-typedef IntVector::reverse_iterator IntVectorRIter;
+  // Constructs a new vector and fills it with {size} elements, each
+  // having the value {def}.
+  ZoneVector(int size, T def, Zone* zone)
+      : std::vector<T, zone_allocator<T>>(size, def, zone_allocator<T>(zone)) {}
+};
 
+// A wrapper subclass std::deque to make it easy to construct one
+// that uses a zone allocator.
+template <typename T>
+class ZoneDeque : public std::deque<T, zone_allocator<T>> {
+ public:
+  explicit ZoneDeque(Zone* zone)
+      : std::deque<T, zone_allocator<T>>(zone_allocator<T>(zone)) {}
+};
+
+// A wrapper subclass for std::queue to make it easy to construct one
+// that uses a zone allocator.
+template <typename T>
+class ZoneQueue : public std::queue<T, std::deque<T, zone_allocator<T>>> {
+ public:
+  // Constructs an empty queue.
+  explicit ZoneQueue(Zone* zone)
+      : std::queue<T, std::deque<T, zone_allocator<T>>>(
+            std::deque<T, zone_allocator<T>>(zone_allocator<T>(zone))) {}
+};
+
+// Typedefs to shorten commonly used vectors.
+typedef ZoneVector<bool> BoolVector;
+typedef ZoneVector<int> IntVector;
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_CONTAINERS_H_