Re: c++ recursive class

From:
David Wilkinson <no-reply@effisols.com>
Newsgroups:
microsoft.public.vc.mfc
Date:
Tue, 22 Dec 2009 09:11:56 -0500
Message-ID:
<Ongq4CxgKHA.5792@TK2MSFTNGP05.phx.gbl>
Luigino wrote:

HI Joe...

i'll explain better my situation: I have a XML file and I'm using
tinyxml to elaborate it... so I wanted just to navigate nodes and to
set/get attributes in this way:

MyDocument->Node(nodename, attributenodename, attributetosearch)->Node
(nodename, attributenodename, attributetosearch)->GetAttribute
(attributename);

so I created first class for the node MyNode:

class MyNode : public TiXmlNode
{
public:
        MyNode() { };

       LPCSTR GetAttribute( LPCSTR attributename) { blah blah blah
return LPCSTR;} ;
       void SetAttribute(LPCSTR attributename, LPCSTR attributevalue)
{blah blah blah };

       MyNode* Node( LPCSTR nodename, LPCSTR attributenodename,
LPCSTR attributetosearch )
       { blah blah blah };
};

then I created second class for the document MyDocument so it would
already see MyNode:

class MyDocument : public TiXmlDocument
{
       MyDocument(LPCSTR filename) { blah blah blah };

       MyNode* Node( LPCSTR nodename, LPCSTR attributenodename,
LPCSTR attributetosearch )
       { MyNode::Node(nodename, attributenodename,
attributetosearch); };
};

so each Node call would return a new node to navigate inside the node
itself...but looks like it doesn't compile correctly... How it should
be?...


In class MyDocument you have

MyNode* Node( LPCSTR nodename, LPCSTR attributenodename,
LPCSTR attributetosearch )
{
  MyNode::Node(nodename, attributenodename, attributetosearch);
}

Firstly, there is no return quantity in your definition. Secondly, you are
calling a non-static method of Node without an object.

In future, if you are having linker errors, it would be good if you could post
actual code that compiles.

--
David Wilkinson
Visual C++ MVP

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