Use template in a macro

[Javier_Galan]

Hi,

I want to create a C-macro with a method that receives a template class. It is this possible?

template <class T>

Int_t MyMethod( T* cPointer )
{
// Do whatever with T* 
}

A simple macro including this seems to load without errors into ROOT command interface using .L. However, later on the method is not recognised, not autocompleted.

Thanks

[bellenot]

Well, this works for me:

template <class T>
T tfunc(T v)
{
   T x = v;
   std::cout << "x = " << x << std::endl;
   return x;
}

[bellenot@bbcc7x64 rootdev]$ root -l
root [0] .L template.C
root [1] int d = 9;
root [2] tfunc(d)
x = 9
(int) 9
root [3]

[Javier_Galan]

Ok, it works for me too.

I didn’t realise it was working because the function is not autocompleting using TAB key.

So, if I write on ROOT console tfu and press TAB key several times, it will not autocomplete or offer any suggestions. Thats why I thought the method was not loaded. When I execute tfunc once, the method with the integer version exists, and autocompletes.

Personally, this is not convenient if I want to check the methods that are available/loaded. Even if they use a generic template.

[bellenot]

OK, so maybe @Axel can comment on this one…

[Axel]

That’s now https://sft.its.cern.ch/jira/browse/ROOT-10140 and https://sft.its.cern.ch/jira/browse/ROOT-10141 - thanks for reporting!