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c++constructorambiguous

Call of overloaded constructor is ambiguous

I am trying to implement an object-oriented binary tree, however, I get the error message of a call of an overloaded constructor being ambiguous. The problem is that I really do have the necessary constructor, yet C++ doesn't seem to recognize it.

My code: http://pastebin.com/PM9PDYAN

The error message:

56  36  In constructor 'Node::Node(const int&, Node*, Node*, const int&)':
56  36  [Error] call of overloaded 'Node(const int&, Node* const)' is ambiguous
17  3   [Note] Node::Node(const int&, Node*)
15  3   [Note] Node::Node(const int&, const int&, Node*) <near match>
15  3   [Note] no known conversion for argument 2 from 'Node* const' to 'const int&'
37  1   [Note] Node::Node(const int&, Node*, Node*, Node*)
Solution

  • Your two constructors with default arguments "overlap":

    Node(const int&, Node* = nullptr, Node* = nullptr, Node* = nullptr);

    And:

    Node(const int&, Node* = nullptr);

    Both of these could match a call with just an int or just an int and a Node *.

    Looks like there are other overlapping constructors as well.