Method isTypeConstrained

plugins/e57/libE57Format/src/NodeImpl.cpp:201–238

??? use visitor?

//??? use visitor?
bool NodeImpl::isTypeConstrained()
{
   // don't checkImageFileOpen
   // A node is type constrained if any of its parents is an homo VECTOR or COMPRESSED_VECTOR with
   // more than one child
   NodeImplSharedPtr p( shared_from_this() );

   while ( !p->isRoot() )
   {
      // We have a parent since we are not root
      p = NodeImplSharedPtr( p->parent_ ); //??? check if bad ptr?

      switch ( p->type() )
      {
         case TypeVector:
         {
            // Downcast to shared_ptr<VectorNodeImpl>
            std::shared_ptr<VectorNodeImpl> ai( std::static_pointer_cast<VectorNodeImpl>( p ) );

            // If homogeneous vector and have more than one child, then can't change them
            if ( !ai->allowHeteroChildren() && ai->childCount() > 1 )
            {
               return ( true );
            }
         }
         break;
         case TypeCompressedVector:
            // Can't make any type changes to CompressedVector prototype.  ???
            // what if hasn't been written to yet
            return ( true );
         default:
            break;
      }
   }
   // Didn't find any constraining VECTORs or COMPRESSED_VECTORs in path above us, so our type is
   // not constrained.
   return ( false );
}

NodeImplSharedPtr NodeImpl::get( const ustring &pathName )
{