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Showing content from https://cplusplus.com/reference/tuple/tuple/ below:

class template

<tuple>

template <class... Types> class tuple;

Tuple

Types...

A list of types used for the elements, in the same order as they are going to be ordered in the tuple.

(constructor)

Construct tuple (public member function)

tuple::operator=

Assign content (public member function)

tuple::swap

Swap content (public member function)

relational operators (tuple)

Relational operators for tuple (function template)

swap (tuple)

Exchanges the contents of two tuples (function template)

get (tuple)

Get element (function template)

uses_allocator<tuple>

Uses allocator for tuple (class template)

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// tuple example
#include <iostream>     // std::cout
#include <tuple>        // std::tuple, std::get, std::tie, std::ignore

int main ()
{
  std::tuple<int,char> foo (10,'x');
  auto bar = std::make_tuple ("test", 3.1, 14, 'y');

  std::get<2>(bar) = 100;                                    // access element

  int myint; char mychar;

  std::tie (myint, mychar) = foo;                            // unpack elements
  std::tie (std::ignore, std::ignore, myint, mychar) = bar;  // unpack (with ignore)

  mychar = std::get<3>(bar);

  std::get<0>(foo) = std::get<2>(bar);
  std::get<1>(foo) = mychar;

  std::cout << "foo contains: ";
  std::cout << std::get<0>(foo) << ' ';
  std::cout << std::get<1>(foo) << '\n';

  return 0;
}

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