Boost.Hana: std::tuple< T > Struct Template Reference

| Boost.Hana 1.0.0 Your standard library for metaprogramming |

std::tuple< T > Struct Template Reference
External adapters » Standard library adapters

## Description

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

Adapter for `std::tuple`s.

## 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 2013-2016
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#include <boost/hana/assert.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/ext/std/tuple.hpp>
#include <boost/hana/integral_constant.hpp>
#include <boost/hana/transform.hpp>
#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) {
return a.name;
});
BOOST_HANA_RUNTIME_CHECK(hana::equal(
names,
std::make_tuple("Moby Dick", "Garfield", "Snoopy")
));
}