Add a place for extra returns.

[luiscubal]

@RetroX Yes, and variable-length pairs seem like a good replacement of tuples(I don't know enough about the internal implementations to discuss whether they are equivalent).
Of course, the existence of pairs isn't mutually exclusive to syntax sugar.

[RetroX]

Alternatively, use 0x's initaliser lists for var args and return vectors.

template<typename type> std::vector<type> some_function(std::vector<type> args);
some_function({1,2,3,...});

Speaking of which, ENIGMA's var should support operator= with initialiser lists.