C++ - Unresolved External Error

Question

I am currently writing a stack class that uses linked lists. I feel like i am done but I keep getting an Unresolved external error.

Here it is:

Error: Unresolved external 'Stack<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >::Node::Node(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)' referenced from C:\USERS\JOHNNY\DESKTOP\STACK\INFIX_TO_RPN.OBJ

Does anyone have any idea what to do? I sure don't. I can provide code if necessary.

node is a nested class. And I defined the template in the header. — Johnrad, Nov 01 '10 at 20:27

score 1 · Accepted Answer · answered Nov 01 '10 at 01:57

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That's complaining that a function Stack<...>::Node::Node(std::string) does not seem to have an implementation. Most likely it's that you've added the declaration for that constructor and used it somewhere, but your implementation is missing or misnamed.

answered Nov 01 '10 at 01:57

John Calsbeek

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Or, as we are dealing with templates, the implementation is in another source file, which does not use it. – Bart van Ingen Schenau Nov 01 '10 at 19:27

C++ - Unresolved External Error

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