Boost.Hana  1.7.1
Your standard library for metaprogramming
std::tuple< T > Struct Template Reference

Description

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 LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#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;
});
names,
std::make_tuple("Moby Dick", "Garfield", "Snoopy")
));
}
Defines macros to perform different kinds of assertions.
Defines boost::hana::equal.
Adapts std::tuple for use with Hana.
constexpr auto equal
Returns a Logical representing whether x is equal to y.
Definition: equal.hpp:64
constexpr auto front
Returns the first element of a non-empty iterable.
Definition: front.hpp:32
#define BOOST_HANA_RUNTIME_CHECK(...)
Equivalent to BOOST_HANA_RUNTIME_ASSERT, but not influenced by the BOOST_HANA_CONFIG_DISABLE_ASSERTIO...
Definition: assert.hpp:209
Defines boost::hana::integral_constant.
Namespace containing everything in the library.
Definition: accessors.hpp:20
Adapter for std::tuples.
Definition: tuple.hpp:49
Defines boost::hana::transform.