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/*!
@file
Forward declares `boost::hana::accessors`.
@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_ACCESSORS_HPP
#define BOOST_HANA_FWD_ACCESSORS_HPP
#include <boost/hana/config.hpp>
#include <boost/hana/core/when.hpp>
BOOST_HANA_NAMESPACE_BEGIN
//! Returns a `Sequence` of pairs representing the accessors of the
//! data structure.
//! @ingroup group-Struct
//!
//! Given a `Struct` `S`, `accessors<S>()` is a `Sequence` of `Product`s
//! where the first element of each pair is the "name" of a member of
//! the `Struct`, and the second element of each pair is a function that
//! can be used to access that member when given an object of the proper
//! data type. As described in the global documentation for `Struct`, the
//! accessor functions in this sequence must be move-independent.
//!
//!
//! Example
//! -------
//! @include example/accessors.cpp
#ifdef BOOST_HANA_DOXYGEN_INVOKED
template <typename S>
constexpr auto accessors = []() {
return tag-dispatched;
};
#else
template <typename S, typename = void>
struct accessors_impl : accessors_impl<S, when<true>> { };
template <typename S>
struct accessors_t;
template <typename S>
constexpr accessors_t<S> accessors{};
#endif
BOOST_HANA_NAMESPACE_END
#endif // !BOOST_HANA_FWD_ACCESSORS_HPP
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