"not delcared in this scope" when subclassing a template

[John (Eljay) Love-Jensen]

Hi Alexei,

C++ (which GCC's g++ tries to be compliant)  does not know if the code is referring to Base's elems, or some global elems.

So it gives an error, as required per C++ ISO 14882.

You can get around that error by doing:
this->elems

That will tell GCC's g++ where to look for the elems identifier.

HTH,
--Eljay