apply_n.hpp

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// Copyright (c) 2020-2025 Cody R. Drisko. All rights reserved.
// Licensed under the MIT License. See the LICENSE file in the project root for more information.
//
// Name: apply_n.hpp
// Author: crdrisko
// Date: 11/21/2020-10:35:11
// Description: An algorithm, based off std::apply, that only applies a function to the first N elements of a tuple
 
#ifndef DRYCHEM_COMMON_UTILITIES_INCLUDE_COMMON_UTILS_META_TYPES_TUPLES_TUPLEALGORITHMS_APPLY_N_HPP
#define DRYCHEM_COMMON_UTILITIES_INCLUDE_COMMON_UTILS_META_TYPES_TUPLES_TUPLEALGORITHMS_APPLY_N_HPP
 
#include <cstddef>
#include <tuple>
#include <utility>
 
#include "common-utils/meta/types/tuples/tupleAlgorithms/select.hpp"
 
namespace CppUtils::Meta
{
    template<std::size_t N, typename F, typename Tuple>
    constexpr decltype(auto) apply_n(F&& f, Tuple&& tuple)
    {
        return std::apply(std::forward<F>(f), select(std::forward<Tuple>(tuple), std::make_index_sequence<N> {}));
    }
}   // namespace CppUtils::Meta
 
#endif