Re: Problem with ostringstream and Daixtrose

Hi!

Yes, I dislike the way C++ name lookup is unable to be directed
to the right path here. 
The reason for the error is that 
  using namespace Daixt::DefaultOps;
includes operator<< which is then chosen instead the correct one.
I should have investigated why this happens even for the case you 
also say
  using namespace std;

Seems like my operator is a better match - which i did not expect.

Unfortuantely Compilers reject
  using std::operator<<;
and also I would appreciate C++ to have keyword "not"
  not using Daixt::DefaultOps::operator<<

The only way you may get around this problem is by
using using declaratives (sic!) a la

using Daixt::DefaultOps::operator+;
using Daixt::DefaultOps::operator-;
using Daixt::DefaultOps::operator*;
using Daixt::DefaultOps::operator/;
using Daixt::DefaultOps::operator==;
using Daixt::DefaultOps::operator%=;
using Daixt::DefaultOps::Pow;
using Daixt::DefaultOps::RationalPow;

instead of using the whole namespace at once.
Things will get much better in the next evolution step
of my library, but this issue really bites.

Code snippet that compiles with intel-9 but still fails with
gcc-3.3.4 which has some trouble with the using stuff, so you
probably have to take a newer gcc - I am unsure here.

#include "daixtrose/Daixt.h"
#include "daixtrose/DefaultOps.h"

#include <iostream>
#include <sstream>

int main()
{
  using namespace std;
  using Daixt::DefaultOps::operator+;
  //using namespace Daixt::DefaultOps;

  std::ostringstream out;
  

  //std::cout << "Test of sstream problem " << std::endl;
  out << "Test of sstream problem " << std::endl;
  std::cout << out.str();
  return 0;
}



Btw.: I like to see someone else use my lib.
The key issues become clear in a way I could not
achieve myself. Thank you for beta-using!

best regards,

Markus



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