alphabet/nucleotide/concept.hpp

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// SPDX-FileCopyrightText: 2006-2025 Knut Reinert & Freie Universität Berlin
// SPDX-FileCopyrightText: 2016-2025 Knut Reinert & MPI für molekulare Genetik
// SPDX-License-Identifier: BSD-3-Clause

 
#pragma once
 
#include <concepts>
 
#include <seqan3/alphabet/concept.hpp>
 
// ============================================================================
// complement()
// ============================================================================
 
namespace seqan3::detail::adl_only
{

template <typename... args_t>
void complement(args_t...) = delete;

struct complement_cpo : public detail::customisation_point_object<complement_cpo, 2>
{
    using base_t = detail::customisation_point_object<complement_cpo, 2>;
    using base_t::base_t;

    template <typename alphabet_t>
    static constexpr auto SEQAN3_CPO_OVERLOAD(priority_tag<2>, alphabet_t && alphabet)(
        /*return*/ seqan3::custom::alphabet<alphabet_t>::complement(std::forward<alphabet_t>(alphabet)) /*;*/
    );

    template <typename alphabet_t>
    static constexpr auto SEQAN3_CPO_OVERLOAD(priority_tag<1>, alphabet_t && alphabet)(
        /*return*/ complement(std::forward<alphabet_t>(alphabet)) /*;*/
    );

    template <typename alphabet_t>
    static constexpr auto SEQAN3_CPO_OVERLOAD(priority_tag<0>, alphabet_t && alphabet)(
        /*return*/ std::forward<alphabet_t>(alphabet).complement() /*;*/
    );
};
 
} // namespace seqan3::detail::adl_only
 
namespace seqan3
{


inline constexpr auto complement = detail::adl_only::complement_cpo{};
 
// ============================================================================
// nucleotide_alphabet concept
// ============================================================================

template <typename t>
concept nucleotide_alphabet = alphabet<t> && requires (t val) {
    { seqan3::complement(val) };
};
 
} // namespace seqan3