Linked Questions
36 questions linked to/from Why do I get "unresolved external symbol" errors when using templates?
2340 votes
20 answers
848k views
Why can templates only be implemented in the header file?
Quote from The C++ standard library: a tutorial and handbook: The only portable way of using templates at the moment is to implement them in header files by using inline functions. Why is this? (...
49 votes
6 answers
33k views
C++ template, linking error [duplicate]
I have a problem in calling a template class I have. I declared a new type name Array, which is a template; In the .hpp file: template <typename T> class Array { public: Array(); }; In the ....
4 votes
3 answers
10k views
"error LNK2019: unresolved external symbol" when using templates [duplicate]
Possible Duplicate: Why do I get “unresolved external symbol” errors when using templates? I am using templates in my code while there is always an error LNK2019. Here is part of my ...
7 votes
2 answers
20k views
C++ undefined reference to template class method [duplicate]
I always get undefined reference to `Graph::InsertVertex(std::string)' if I compile my project! Any hints why he cant resolve this reference? (all Files are in the netbeans project folder) // main....
3 votes
3 answers
21k views
Template class - unresolved external symbol(s) [duplicate]
I get this error a LOT, and i never know why. Can someone help me find the cause of it? Edit:Removed code
3 votes
2 answers
25k views
ERROR LNK2019:unresolved external symbol, c++ [duplicate]
I have written a template class, for a map/dictionary data structure, and keep getting this strange error (ERROR LNK2019:unresolved external symbol) Code: AssArray.h: #pragma once template <...
1 vote
6 answers
7k views
undefined reference to <std::string>std::string& [duplicate]
Possible Duplicate: Why do I get “unresolved external symbol” errors when using templates? “undefined reference” to a template class function I got error on line: Console:...
3 votes
1 answer
6k views
Undefined reference to `LinkedList<int>::push_front(int) [duplicate]
Possible Duplicate: Why do I get “unresolved external symbol” errors when using templates? LinkedList.h #ifndef LINKEDLIST_H #define LINKEDLIST_H #include<iostream> template<class T> ...
1 vote
1 answer
6k views
"unresolved external symbol" error when trying to compile C++ project [duplicate]
I am trying to implement a few classes but i got the following error when compiling the codes. I have tried to removed all the redundant codes but none of them helps. I have no idea what went wrong. ...
2 votes
2 answers
2k views
Unresolved externals using C++ lambdas [duplicate]
I am getting unresolved externals compile error with following code snippet. acquire_gray(identity, []{}); samething happens when I try to use auto auto acquire_callback = [](LPBITMAPINFOHEADER ...
0 votes
2 answers
4k views
undefined reference to vector<String> g++ linker error [duplicate]
I have compiled the dependent files of my source file mycpp.c and linked the files in the order which they have used .All the dependant files are available in the same folder. **//Compilation** ...
3 votes
1 answer
1k views
get linker error while overloading operator << for template class [duplicate]
I use visual c++. I have a template class and I want add overlapped operation for it I impelement it like below in header file template <class T> class QuantityT; template <class T&...
1 vote
0 answers
3k views
error LNK2019: unresolved external symbol in my Template class [duplicate]
I have created a list and it worked perfectly, but I have to rewrite it using template, I have done this. But when I trying to compile my code I get Linker Error! Can you help with this code? Any help ...
0 votes
2 answers
2k views
error LNK2019: unresolved external symbol "public: [duplicate]
Relearning C++ for the sake of using OpenCL. I have created a Helper Class called CheckDevice which has a bunch of boiler plate code for getting device stats. CheckDevice.h class Utils { ...
2 votes
3 answers
165 views
Virtual methods in templates are not generated [duplicate]
Possible Duplicate: Why do I get “unresolved external symbol” errors when using templates? I have a little bit complicated set of classes. Class _A which has child parametrized class A which has ...