tuple_iterator.hpp

// Copyright (C) 2022-2023 by Camden Mannett.
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE or copy at https://www.boost.org/LICENSE_1_0.txt)
 
#pragma once
 
#include "arg_router/traits.hpp"
 
#include <boost/mp11/algorithm.hpp>
 
namespace arg_router::utility
{
template <typename F, typename Tuple>
constexpr std::enable_if_t<traits::is_tuple_like_v<std::decay_t<Tuple>>> tuple_iterator(
    F&& f,
    Tuple&& tuple)
{
    constexpr auto N = std::tuple_size_v<std::decay_t<Tuple>>;
    boost::mp11::mp_for_each<boost::mp11::mp_iota_c<N>>([&](auto i) { f(i, std::get<i>(tuple)); });
}
 
template <typename F, typename... T>
constexpr void tuple_iterator(F&& f, T&&... pack)
{
    tuple_iterator(std::forward<F>(f), std::tuple{std::forward<T>(pack)...});
}
 
template <typename Tuple, typename F>
constexpr std::enable_if_t<traits::is_tuple_like_v<std::decay_t<Tuple>>> tuple_type_iterator(F&& f)
{
    constexpr auto N = std::tuple_size_v<std::decay_t<Tuple>>;
    boost::mp11::mp_for_each<boost::mp11::mp_iota_c<N>>([&](auto i) { f(i); });
}
}  // namespace arg_router::utility