concept.hpp

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// -----------------------------------------------------------------------------------------------------
// Copyright (c) 2006-2022, Knut Reinert & Freie Universität Berlin
// Copyright (c) 2016-2022, Knut Reinert & MPI für molekulare Genetik
// This file may be used, modified and/or redistributed under the terms of the 3-clause BSD-License
// shipped with this file and also available at: https://github.com/seqan/seqan3/blob/master/LICENSE.md
// -----------------------------------------------------------------------------------------------------
 
#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