uint.hpp

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// -----------------------------------------------------------------------------------------------------
// 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/seqan/seqan3/blob/master/LICENSE.md
// -----------------------------------------------------------------------------------------------------
 
#pragma once
 
#include <seqan3/alphabet/concept.hpp>
#include <seqan3/core/detail/int_types.hpp>
 
namespace seqan3::detail
{
template <typename type>
constexpr bool is_uint_adaptation_v = std::same_as<type, uint8_t>  ||
                                      std::same_as<type, uint16_t> ||
                                      std::same_as<type, uint32_t>;
} // namespace seqan3::detail
 
namespace seqan3::custom
{
 
template <typename uint_type>
    requires seqan3::detail::is_uint_adaptation_v<uint_type>
struct alphabet<uint_type>
{
    static constexpr auto alphabet_size =
        detail::min_viable_uint_t<detail::size_in_values_v<uint_type>>{detail::size_in_values_v<uint_type>};
 
    static constexpr auto to_char(uint_type const intgr) noexcept
    {
        if constexpr (std::same_as<uint_type, uint8_t>)
            return static_cast<char>(intgr);
        else if constexpr (std::same_as<uint_type, uint16_t>)
            return static_cast<char16_t>(intgr);
        else
            return static_cast<char32_t>(intgr);
    }
 
    static constexpr uint_type to_rank(uint_type const intgr) noexcept
    {
        return intgr;
    }
 
    static constexpr uint_type & assign_char_to(decltype(to_char(uint_type{})) const chr, uint_type & intgr) noexcept
    {
        return intgr = chr;
    }
 
    static constexpr uint_type & assign_rank_to(uint_type const intgr2, uint_type & intgr) noexcept
    {
        return intgr = intgr2;
    }
};
 
} // namespace seqan3::custom