outputOperator.hh

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#ifndef OutputOperator_h
#define OutputOperator_h
 
#include <iostream>
#include <memory>
#include <map>
 
#include "output.hh"
 
namespace concepts {
 
  // ******************************************************** OutputOperator **
 
  class OutputOperator {
    friend std::ostream& operator<<(std::ostream& os, const OutputOperator& o);
  public:
    virtual ~OutputOperator();
  protected:
    virtual std::ostream& info(std::ostream& os) const;
  };
  
  // *********************************** Output operator for a std::unique_ptr<> **
  
  template<class F>
  std::ostream& operator<<(std::ostream& os, const std::unique_ptr<F>& p) {
    if (p.get()) return os << "&" << *p;  // pointer to value
    return os << "0";
  }
  
} // namespace concepts
 
 
// *************************************** Output operator for a std::pair<> **
 
template<class F, class G>
std::ostream& operator<<(std::ostream& os, const std::pair<F,G>& p) {
  return os << "std::pair(" << p.first << ", " << p.second << ")";
}
 
namespace concepts {
  
  template<class F, class G>
  std::ostream& operator<<(std::ostream& os, const std::pair<F,G>& p) {
    return os << "std::pair(" << p.first << ", " << p.second << ")";
  }
 
  // ************************************** Output operator for a std::map<> **
 
  template<class F, class G>  
  std::ostream& operator<<(std::ostream& os, const std::map<F,G*>& m) {
    os << "std::map(";
    typename std::map<F,G*>::const_iterator i = m.begin();
    for(; i != m.end(); ++i)
      os << std::endl << "   (" 
         << i->first  << "-> &"
         << *i->second << ") ";
    return os << ')';
  }
 
  template<class F, class G>  
  std::ostream& operator<<(std::ostream& os, const std::map<F,G>& m) {
    os << "std::map(";
    typename std::map<F,G>::const_iterator i = m.begin();
    for(; i != m.end(); ++i)
      os << std::endl << "   (" 
         << i->first  << " -> "
         << i->second << ") ";
    return os << ')';
  }
 
}
 
#endif // OutputOperator_h