linking errors: xxx already defined

[tuli]

So here goes another linking error thread!

I am forced to have the deceleration of a class template in the .h file.
See here: http://forums.codeguru.com/showthrea...t=#post2081723

This works perfectly fine, as long as i #inlcude the header file only in ONE .cpp file.
The moment i #inlude it in several .cpp files, i get LNK2005 already-defined errors.

a.obj : error LNK2005: "public: unsigned int * __thiscall theclass::themthod(void)" (?xxx@theclass@@QAEPAIXZ) already defined in b.obj

I would have assumed inclusion guards can protect me from this, but wrong.


After 4+ hours trying to figure this out, i am in desperate need for some help.


nice weekend to everyone!

[tuli]

wait.


ok, i forgot to mention that the .h file in question held several thousand lines of code.
Turns out two smaller non-template classes hid in between the templated code and accounted for the linking errors, the actual templates i cant outsource into a .cpp file compile fine. The problem was that said classes were defined in the .h file too and with all the template stuff around i missed that.

Yeah, that`s how a whole firday goes to waste.

[D_Drmmr]

ok, i forgot to mention that the .h file in question held several thousand lines of code.
Turns out two smaller non-template classes hid in between the templated code and accounted for the linking errors, the actual templates i cant outsource into a .cpp file compile fine. The problem was that said classes were defined in the .h file too and with all the template stuff around i missed that.

Yeah, that`s how a whole firday goes to waste.

That's why the 'one class per header file' guideline is a good one to follow.