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;

s         


        

Answer 1

Don't worry about speed or layout, that's nano-optimisation, and depends on the compiler, and there's never enough difference to influence your decision.

You use a struct for things that meaningfully belong together to form a whole.

You use a tuple for things that are together coincidentally. You can use a tuple spontaneously in your code.