Question

I do not seem to understand how to catch constructor exception.
Here is relevant code:

     struct Thread {
            rysq::cuda::Fock fock_;
            template<class iterator>
            Thread(const rysq::cuda::Centers &centers,
                   const iterator (&blocks)[4])
                : fock_()
            {
                if (!fock_) throw;
           }
      };

      Thread *ct;
      try { ct = new Thread(centers_, blocks); }
      catch(...) { return false; } // catch never happens,

So catch statement do not execute and I get unhandled exception.
What did I do wrong? this is straight C++ using g++.

Answer 1

You have to throw an object, e.g.,

throw std::exception();

throw with no operand is only used inside of a catch block to rethrow the exception being handled by the catch block.