error: use of ‘this’ in a constant expression while using helper funciton

[CakeByTheOcean]

Hello everyone. I had a problem when I try to call a helper function from my a::util namespace.
My code can not be compiled: error: use of ‘this’ in a constant expression (refer to the calling of util::count();)
Do you have idea? Where should I place my helper functions. I think they do not belong to a class. Do they?

//--------a.hh----------
#include "util.hh"
namespace a {
  Class DB {
    A a;
    int foo() {
       return util::count();
    }
  }
}


//--------util.hh----------
namespace a {
namespace util {
  template <class E, class C>
  int count();
  
  templace<> int count<int, int>() {
     return 42;
  }
}
}

[helios]

The code you've posted is nonsense. In particular:
1. What's going on on line 3?
2. The functions in util.hh are not visible from a.hh.

[CakeByTheOcean]

Sorry. I have changed the code little bit. Is that more helpful?

[Peter87]

It looks like it will not be able to deduce the template arguments so you will probably need to specify the types explicitly when calling util::count().

return util::count<int, int>();

Not sure if this is related to your error message or not. It's hard to say what the problem is because your code is incomplete and contains many mistakes.