tuple類型是一個類似pair的模板。每個pari的成員類型都不相同，但每個pair都恰好有2個成員。不同tuple類型的成員類型不相同。 Defined in header <tuple>

construct template< class… Types > class tuple;

Member functions(constructor)

Non-member functions

- make_tuple //creates a tuple object of the type defined by the argument types - tie - forward_as_tuple - tuple_cat - std::get(std::tuple)//tuple accesses specified element - operator== - operator!= - operator< - operator<= - operator> - operator>= - std::swap

Helper classes