C++ Tuple vs Struct

Question

Is there is any difference between using a std::tuple and a data-only struct?

typedef std::tuple foo_t;

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Answer 1

Tuple has built in default(for == and != it compares every element, for <.<=... compares first, if same compares second...) comparators: http://en.cppreference.com/w/cpp/utility/tuple/operator_cmp

edit: as noted in the comment C++20 spaceship operator gives you a way to specify this functionality with one(ugly, but still just one) line of code.