Returning multiple values from a C++ function

Question

Is there a preferred way to return multiple values from a C++ function? For example, imagine a function that divides two integers and returns both the quotient and the rema

Answer 1

With C++17 you can also return one ore more unmovable/uncopyable values (in certain cases). The possibility to return unmovable types come via the new guaranteed return value optimization, and it composes nicely with aggregates, and what can be called templated constructors.

template
struct many {
  T1 a;
  T2 b;
  T3 c;
};

// guide:
template
many(T1, T2, T3) -> many;

auto f(){ return many{string(),5.7, unmovable()}; }; 

int main(){
   // in place construct x,y,z with a string, 5.7 and unmovable.
   auto [x,y,z] = f();
}

The pretty thing about this is that it is guaranteed to not cause any copying or moving. You can make the example many struct variadic too. More details:

Returning variadic aggregates (struct) and syntax for C++17 variadic template 'construction deduction guide'