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/*!
@file
Forward declares `boost::hana::basic_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)
*/
#ifndef BOOST_HANA_FWD_BASIC_TUPLE_HPP
#define BOOST_HANA_FWD_BASIC_TUPLE_HPP
#include <boost/hana/config.hpp>
#include <boost/hana/fwd/core/make.hpp>
BOOST_HANA_NAMESPACE_BEGIN
//! @ingroup group-datatypes
//! Stripped down version of `hana::tuple`.
//!
//! Whereas `hana::tuple` aims to provide an interface somewhat close to a
//! `std::tuple`, `basic_tuple` provides the strict minimum required to
//! implement a closure with maximum compile-time efficiency.
//!
//!
//! Modeled concepts
//! ----------------
//! `Sequence`, and all the concepts it refines
template <typename ...Xs>
struct basic_tuple;
//! Tag representing `hana::basic_tuple`.
//! @relates hana::basic_tuple
struct basic_tuple_tag { };
#ifdef BOOST_HANA_DOXYGEN_INVOKED
//! Function object for creating a `basic_tuple`.
//! @relates hana::basic_tuple
//!
//! Given zero or more objects `xs...`, `make<basic_tuple_tag>` returns a
//! new `basic_tuple` containing those objects. The elements are held by
//! value inside the resulting tuple, and they are hence copied or moved
//! in. This is analogous to `std::make_tuple` for creating `basic_tuple`s.
//!
//!
//! Example
//! -------
//! @include example/basic_tuple/make.cpp
template <>
constexpr auto make<basic_tuple_tag> = [](auto&& ...xs) {
return basic_tuple<std::decay_t<decltype(xs)>...>{forwarded(xs)...};
};
#endif
//! Alias to `make<basic_tuple_tag>`; provided for convenience.
//! @relates hana::basic_tuple
//!
//!
//! Example
//! -------
//! @include example/basic_tuple/make.cpp
constexpr auto make_basic_tuple = make<basic_tuple_tag>;
BOOST_HANA_NAMESPACE_END
#endif // !BOOST_HANA_FWD_BASIC_TUPLE_HPP
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