Merge pull request #98 from laplaceyang/pr_iterator

add iterator for msgs access of mulitpart_t

Author: bluca

zmq_addon.hpp

@@ -46,6 +46,13 @@ class multipart_t
     std::deque<message_t> m_parts;
 
 public:
+
+    typedef std::deque<message_t>::iterator iterator;
+    typedef std::deque<message_t>::const_iterator const_iterator;
+
+    typedef std::deque<message_t>::reverse_iterator reverse_iterator;
+    typedef std::deque<message_t>::const_reverse_iterator const_reverse_iterator;
+
     // Default constructor
     multipart_t()
     {}
@@ -113,6 +120,56 @@ class multipart_t
         return m_parts.at(n);
     }
 
+    iterator begin()
+    {
+        return m_parts.begin();
+    }
+
+    const_iterator begin() const
+    {
+        return m_parts.begin();
+    }
+
+    const_iterator cbegin() const
+    {
+        return m_parts.cbegin();
+    }
+
+    reverse_iterator rbegin()
+    {
+        return m_parts.rbegin();
+    }
+
+    const_reverse_iterator rbegin() const
+    {
+        return m_parts.rbegin();
+    }
+
+    iterator end()
+    {
+        return m_parts.end();
+    }
+
+    const_iterator end() const
+    {
+        return m_parts.end();
+    }
+
+    const_iterator cend() const
+    {
+        return m_parts.cend();
+    }
+
+    reverse_iterator rend()
+    {
+        return m_parts.rend();
+    }
+
+    const_reverse_iterator rend() const
+    {
+        return m_parts.rend();
+    }
+
     // Delete all parts
     void clear()
     {