text: 
  /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifndef avro_Layout_hh__
  #define avro_Layout_hh__
  
  #include <boost/noncopyable.hpp>
  #include "Boost.hh"
  
  /// \file Layout.hh
  ///
  
  namespace avro {
      
  class Layout : private boost::noncopyable {
  
    protected:
  
      Layout(size_t offset = 0) :
          offset_(offset)
      {}
  
    public:
  
      size_t offset() const {
          return offset_;
      }
  
      virtual ~Layout() {}
  
    private:
  
      const size_t offset_;
  };
  
  class PrimitiveLayout : public Layout {
  
    public:
  
      PrimitiveLayout(size_t offset = 0) :
          Layout(offset)
      {}
  };
  
  class CompoundLayout : public Layout {
  
    public:
  
      CompoundLayout(size_t offset = 0) :
          Layout(offset)
      {}
  
      void add(Layout *layout) {
          layouts_.push_back(layout);
      }
  
      const Layout &at (size_t idx) const {
          return layouts_.at(idx);
      }
  
    private:
  
      boost::ptr_vector<Layout> layouts_;
  };
  
  } // namespace avro
  
  #endif
  