Hello! I have a very simple class, called Node.

Node.h
Qt Code: 
  1. #ifndef NODE_H
  2. #define NODE_H
  3.  
  4. #include <QSet>
  5.  
  6. class Node
  7. {
  8.  
  9. public:
  10.     Node();
  11.     Node(const uchar &c);
  12.  
  13.     uchar val;
  14.     QSet<Node> childNodes;
  15.  
  16.     bool addChild(const Node& node);
  17.  
  18.     inline bool operator==(const Node &n1, const Node &n2)
  19.     {
  20.         return n1.val == n2.val;
  21.     }
  22.  
  23.     inline uint qHash(const Node &node)
  24.     {
  25.         return qHash(node.val);
  26.     }
  27.  
  28. };
  29.  
  30. #endif // NODE_H
To copy to clipboard, switch view to plain text mode 
Node.cpp
Qt Code: 
  1. #include "Node.h"
  2.  
  3. Node::Node()
  4. {
  5.     val = -1;
  6. }
  7.  
  8. Node::Node(const uchar &c)
  9. {
  10.     val = c;
  11. }
  12.  
  13. bool Node::addChild(const Node &node)
  14. {
  15.     if(childNodes.contains(node))
  16.         return false;
  17.  
  18.     childNodes.insert(node);
  19.     return true;
  20. }
To copy to clipboard, switch view to plain text mode 
I get the following error messages:

  • 'bool Node::operator==(const Node&, const Node&)' must take exactly one argument
  • no matching function for call to 'qHash(const Node&)'
  • no match for 'operator==' in key0==((QHashNode<Node, QHashDummyValue*)this)->QHashNode<Node,QHashDummyValue>::key'


What can be the problem?

Thanks in advance!