Boost.Hana  1.6.0
Your standard library for metaprogramming
std::tuple< T > Struct Template Reference


template<typename ... T>
struct std::tuple< T >

Adapter for std::tuples.

Modeled concepts

A std::tuple is a model of the Sequence concept, and all the concepts it refines. That makes it essentially the same as a Hana tuple, although the complexity of some operations might differ from that of Hana's tuple.

// Copyright Louis Dionne 2013-2017
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file or copy at
#include <string>
#include <tuple>
namespace hana = boost::hana;
struct Fish { std::string name; };
struct Cat { std::string name; };
struct Dog { std::string name; };
int main() {
std::tuple<Fish, Cat, Dog> animals{{"Nemo"}, {"Garfield"}, {"Snoopy"}};
hana::front(animals).name = "Moby Dick";
auto names = hana::transform(animals, [](auto a) {
std::make_tuple("Moby Dick", "Garfield", "Snoopy")