////
Copyright 2017 Peter Dimov

Distributed under the Boost Software License, Version 1.0.

See accompanying file LICENSE_1_0.txt or copy at
http://www.boost.org/LICENSE_1_0.txt
////

[#tuple]
# Tuple Operations, <boost/mp11/tuple.hpp>
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## tuple_apply(f, tp)

    template<class F, class Tp> constexpr /*...*/ tuple_apply(F&& f, Tp&& tp);

`tuple_apply(f, tp)` returns `std::forward<F>(f)(std::get<J>(std::forward<Tp>(tp))...)` for `J` in 0..`N-1`,
where `N` is `std::tuple_size<typename std::remove_reference<Tp>::type>::value`. Same as `std::apply` in C++17.

## construct_from_tuple<T>(tp)

    template<class T, class Tp> T construct_from_tuple(Tp&& tp);

`construct_from_tuple<T>(tp)` returns `T(std::get<J>(std::forward<Tp>(tp))...)` for `J` in 0..`N-1`,
where `N` is `std::tuple_size<typename std::remove_reference<Tp>::type>::value`. Same as `std::make_from_tuple` in {cpp}17.
The name of the function doesn't match the {cpp}17 one to avoid ambiguities when both are visible or in unqualified calls.

## tuple_for_each(tp, f)

    template<class Tp, class F> constexpr F tuple_for_each(Tp&& tp, F&& f);

`tuple_for_each(tp, f)` applies the function object `f` to each element of `tp` by evaluating the
expression `f(std::get<J>(std::forward<Tp>(tp)))` for `J` in 0..`N-1`, where `N` is `std::tuple_size<typename std::remove_reference<Tp>::type>::value`.

Returns `std::forward<F>(f)`.