Error C2079 Template

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Uses Undefined Class Template

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C++ Error C2079

posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of error c2079 uses undefined class 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up error C2079: 'stackNameSpace::StackNode::value' uses undefined class up vote 0 down vote favorite the interface of Stack.h #include "stdafx.h" //use linkedlist to implement the stack //which is different from using the array to implement the stack #ifndef STACK_H #define STACK_H using namespace std; namespace stackNameSpace { template struct StackNode { T value; T min_value; //current local min value StackNode* next; }; typedef StackNode* StackNodePtr; template class Stack { private: StackNodePtr top; public: Stack(); Stack(const Stack& a_stack); ~Stack(); bool empty() const; T pop(); void push(T the_value); T getMin(); }; } //end of namespace #endif The implementation of the stack.h #include "stdafx.h" //use linkedlist to implement the stack //which is different from using the array to implement the stack #ifndef STACK_CPP #define STACK_CPP #include #include #include "Stack.h" using namespace std; namespace stackNameSpace { template Stack::Stack() : top(NULL) //here should be Stack instead of Stack {} template Stack::Stack(const Stack& a_stack) { if (a_stack.top == NULL) { return NULL; } else { StackNodePtr currentOld = a_stack.top; //construct the top of the new stack StackNodePtr currentNew = new StackNode;//the struct currentNew->value = currentOld->value; currentNew->min_value = currentOld->min_value; top = currentNew; //contruct the rest node in the sta

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, http://stackoverflow.com/questions/16113679/error-c2079-stacknamespacestacknodetvalue-uses-undefined-class helping each other. Join them; it only takes a minute: Sign up is it possible to have templated classes within a template class? up vote 1 down vote favorite template class C { std::list m_List; ... } Is the above code possible? I would like to be able to do something similar. Why I http://stackoverflow.com/questions/269081/is-it-possible-to-have-templated-classes-within-a-template-class ask is that i get the following error: Error 1 error C2079: 'std::_List_nod<_Ty,_Alloc>::_Node::_Myval' uses undefined class 'M' C:\Program Files\Microsoft Visual Studio 9.0\VC\include\list 41 c++ oop visual-c++ templates share|improve this question edited Nov 6 '08 at 15:36 Luc Touraille 44.9k858118 asked Nov 6 '08 at 15:21 Daniel A. White 120k24231327 I get this error in my app. Error 1 error C2079: 'std::_List_nod<_Ty,_Alloc>::_Node::_Myval' uses undefined class 'M' C:\Program Files\Microsoft Visual Studio 9.0\VC\include\list 41 –Daniel A. White Nov 6 '08 at 15:26 Then maybe you should rephrase your question to include this error in it (since the code you gave is perfectly valid). –Luc Touraille Nov 6 '08 at 15:29 Show more code. This compiles fine in VC9. Just tried it. #include template class C { std::list m_List; }; –Baxissimo Nov 6 '08 at 15:31 As @xtofl and @Joe Corkery mention below, the error you're getting is probably because std::list< M > needs a full definition of M at the

here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of http://stackoverflow.com/questions/10187388/template-class-with-stl-container-member this site About Us Learn more about Stack Overflow the company Business Learn http://users.cis.fiu.edu/~weiss/Deltoid/vcstl/templates more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up error c2079 template class with STL container member up vote 0 down vote favorite I'm writing a template class that uses a std::multimap as a member, and getting compile errors. LocTree.h: #pragma once #include

Template Instantiation Class Template Specialization Template Class Partial Specialization Template Function Specialization Template Parameters Static Members and Variables Templates and Friends Introduction Many C++ programs use common data structures like stacks, queues and lists. A program may require a queue of customers and a queue of messages. One could easily implement a queue of customers, then take the existing code and implement a queue of messages. The program grows, and now there is a need for a queue of orders. So just take the queue of messages and convert that to a queue of orders (Copy, paste, find, replace????). Need to make some changes to the queue implementation? Not a very easy task, since the code has been duplicated in many places. Re-inventing source code is not an intelligent approach in an object oriented environment which encourages re-usability. It seems to make more sense to implement a queue that can contain any arbitrary type rather than duplicating code. How does one do that? The answer is to use type parameterization, more commonly referred to as templates. C++ templates allow one to implement a generic Queue<T> template that has a type parameter T. T can be replaced with actual types, for example, Queue<Customers>, and C++ will generate the class Queue<Customers>. Changing the implementation of the Queue becomes relatively simple. Once the changes are implemented in the template Queue<T>, they are immediately reflected in the classes Queue<Customers>, Queue<Messages>, and Queue<Orders>. Templates are very useful when implementing generic constructs like vectors, stacks, lists, queues which can be used with any arbitrary type. C++ templates provide a way to re-use source code as opposed to inheritance and composition which provide a way to re-use object code. C++ provides two kinds of templates: class templates and function templates. Use function templates to write generic functions that can be used with arbitrary types. For example, one can write searching and sorting routines which can be used with any ar