Multiple output arguments

[Hamid Mushtaq]

The C++ alows returning more than one value from a function through pointers and references.
It would have been nice if we could declare multiple output arguments on the left,
for example : -

int, int GetXY()
{
int x, y;
--------------;
return x, y;
}

and call this as

int x, y;
----------;
x, y = GetXY();
or
(x, y) = GetXY();

Note how much this syntax looks natural to the C++ language.

What do you think?

[Kheun]

So far, the STL only provides std::pair. But if you need more than 2, you may want to consider using boost::tuple which can be downloaded from http://www.boost.org.

[wien]

Unless you are contemplating writing your own compiler, I am fairy certain there is no way you can make that work. (You might be able to hack something similar up by overloading the , operator though.)

Furthermore I don't quite see the point. What you are proposing can easily be acieved by returning a structure with the values you need to return. (std:air can be used for such a purpose)

std::pair<int, int> GetXY()
    {
    int x, y;
    return std::make_pair(x, y);
    }

EDIT: Too slow.

[Graham]

If two values are sufficiently closely related to warrant being returned at the same time from a function, then those two values deserve to be encapsulated into a single object. From the example, I would assume that x and y are coordinates of a 2d point. You should be passing around Point2D objects in that case, not separate values.