char.hpp

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// -----------------------------------------------------------------------------------------------------
// Copyright (c) 2022 deCODE Genetics
// Copyright (c) 2006-2020, Knut Reinert & Freie Universität Berlin
// Copyright (c) 2016-2020, 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/biocpp/biocpp-core/blob/main/LICENSE.md
// -----------------------------------------------------------------------------------------------------
 
#pragma once
 
#include <bio/alphabet/concept.hpp>
#include <bio/meta/detail/int_types.hpp>
 
namespace bio::alphabet::custom
{
 
template <bio::meta::nonint_character char_type>
consteval auto tag_invoke(size, char_type const) noexcept
{
    return meta::detail::min_viable_uint_v<meta::detail::size_in_values_v<char_type>>;
}
 
template <bio::meta::nonint_character char_type>
constexpr auto tag_invoke(to_rank BIOCPP_DOXYGEN_ONLY(tag), char_type const chr) noexcept
{
    return static_cast<meta::detail::min_viable_uint_t<alphabet::size<char_type> - 1>>(chr);
}
 
template <bio::meta::nonint_character char_type>
constexpr char_type & tag_invoke(assign_rank_to                                     BIOCPP_DOXYGEN_ONLY(tag),
                                 decltype(tag_invoke(to_rank{}, char_type{})) const rank,
                                 char_type &                                        chr) noexcept
{
    return chr = rank;
}
 
template <bio::meta::nonint_character char_type>
constexpr char_type tag_invoke(to_char BIOCPP_DOXYGEN_ONLY(tag), char_type const chr) noexcept
{
    return chr;
}
 
template <bio::meta::nonint_character char_type>
constexpr char_type & tag_invoke(assign_char_to  BIOCPP_DOXYGEN_ONLY(tag),
                                 char_type const chr2,
                                 char_type &     chr) noexcept
{
    return chr = chr2;
}
 
 
} // namespace bio::alphabet::custom