CODEWITHSUNDEEP
c++typedef
Learning is a mess
Learning is a mess

Reputation: 8277

Adding ofstream method for object defined by typedef

Let's say a define a custom type in my c++ code to handle vectors in 3d:

typedef tuple<double,double,double> vector3d;

Is it possible to add a method to that so that I can quickly output their coordinates using:

vector3d somevector(1,1,1);
cout << somevector << "\n";

I know I could do it wrapping these objects in a class or a struct but is it possible to do it more straightforwardly?

Upvotes: 0

Views: 37

Answers (1)

Oleg Andriyanov
Oleg Andriyanov

Reputation: 5279

Overload streaming operator for ostream.

typedef tuple<double,double,double> vector3d;

ostream& operator<<(ostream& os, const vector3d& vec)
{
    os << '(' <<
          std::get<0>(vec) << ',' <<
          std::get<1>(vec) << ',' <<
          std::get<2>(vec) << ')';
    return os;
}

int main(int argc, char *argv[])
{
    cout << vector3d(1, 2, 3);
    return 0;
}

Upvotes: 2

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