printable.h

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#ifndef PRINTABLE_H
#define PRINTABLE_H
#include "generic_object.h"
#include <sstream>

namespace FullPhysics {

/****************************************************************/
template<class T> class Printable : public virtual GenericObject {
public:
//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  std::string print_to_string() const
  {
    // This reserve shouldn't really be necessary, but on a Mac
    // 10.4.11 using gcc 4.0.1, there is some kind of bug where we get
    // a "Double free" error when printing in Ruby. I never tracked
    // exactly where this occurred, but it was somewhere in the
    // iostream library when the buffer of os was resized. We just
    // reserve enough space up front so this isn't an issue. Since
    // this only gets called when printing, there shouldn't be much of
    // a performance hit in doing this.
    std::string buf("blah");
    buf.reserve(1000);
    std::ostringstream os(buf);
    ((T*) this)->print(os);
    return os.str();
  }

//-----------------------------------------------------------------------
//-----------------------------------------------------------------------

  friend std::ostream& operator<<(std::ostream& Os, const T& P)
  { P.print(Os); return Os;}
};
}
#endif