advanceable_alignment_coordinate.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 <iterator>
#include <type_traits>
 
#include <seqan3/alignment/matrix/detail/matrix_coordinate.hpp>
#include <seqan3/core/debug_stream/debug_stream_type.hpp>
#include <seqan3/core/debug_stream/tuple.hpp>
#include <seqan3/core/detail/strong_type.hpp>
#include <seqan3/core/detail/template_inspection.hpp>
 
namespace seqan3::detail
{
 
enum struct advanceable_alignment_coordinate_state : uint8_t
{
    none,
    column,
    row
};
 
template <advanceable_alignment_coordinate_state state = advanceable_alignment_coordinate_state::none>
class advanceable_alignment_coordinate
{
public:
    using difference_type = std::make_signed_t<size_t>;
 
    constexpr advanceable_alignment_coordinate() noexcept = default; 
    constexpr advanceable_alignment_coordinate(advanceable_alignment_coordinate const &) noexcept = default;
    constexpr advanceable_alignment_coordinate(advanceable_alignment_coordinate &&) noexcept = default; 
    constexpr advanceable_alignment_coordinate & operator=(advanceable_alignment_coordinate const &) noexcept = default;
    constexpr advanceable_alignment_coordinate & operator=(advanceable_alignment_coordinate &&) noexcept = default;
    ~advanceable_alignment_coordinate() noexcept = default; 
 
    template <advanceable_alignment_coordinate_state other_state>
        requires (other_state != state)
    constexpr advanceable_alignment_coordinate(advanceable_alignment_coordinate<other_state> const & other) :
        first{other.first},
        second{other.second}
    {}
 
    template <advanceable_alignment_coordinate_state other_state>
        requires (other_state != state)
    constexpr advanceable_alignment_coordinate(advanceable_alignment_coordinate<other_state> && other) :
        first{std::move(other.first)},
        second{std::move(other.second)}
    {}
 
    constexpr advanceable_alignment_coordinate(column_index_type<size_t> const c_idx,
                                               row_index_type<size_t> const r_idx) noexcept :
        first{c_idx.get()},
        second{r_idx.get()}
    {}
 
    constexpr friend bool operator==(advanceable_alignment_coordinate const & lhs,
                                     advanceable_alignment_coordinate const & rhs) noexcept
    {
        return std::tie(lhs.first, lhs.second) == std::tie(rhs.first, rhs.second);
    }
 
    constexpr friend bool operator!=(advanceable_alignment_coordinate const & lhs,
                                     advanceable_alignment_coordinate const & rhs) noexcept
    {
        return std::tie(lhs.first, lhs.second) != std::tie(rhs.first, rhs.second);
    }
 
    constexpr friend bool operator<=(advanceable_alignment_coordinate const & lhs,
                                     advanceable_alignment_coordinate const & rhs) noexcept
    {
        return std::tie(lhs.first, lhs.second) <= std::tie(rhs.first, rhs.second);
    }
 
    constexpr friend bool operator<(advanceable_alignment_coordinate const & lhs,
                                    advanceable_alignment_coordinate const & rhs) noexcept
    {
        return std::tie(lhs.first, lhs.second) < std::tie(rhs.first, rhs.second);
    }
 
    constexpr friend bool operator>=(advanceable_alignment_coordinate const & lhs,
                                     advanceable_alignment_coordinate const & rhs) noexcept
    {
        return std::tie(lhs.first, lhs.second) >= std::tie(rhs.first, rhs.second);
    }
 
    constexpr friend bool operator>(advanceable_alignment_coordinate const & lhs,
                                    advanceable_alignment_coordinate const & rhs) noexcept
    {
        return std::tie(lhs.first, lhs.second) > std::tie(rhs.first, rhs.second);
    }
 
    constexpr advanceable_alignment_coordinate & operator++(/*pre-increment*/) noexcept
        requires (state != advanceable_alignment_coordinate_state::none)
    {
        if constexpr (state == advanceable_alignment_coordinate_state::column)
            ++this->first;
        else
            ++this->second;
        return *this;
    }
 
    constexpr advanceable_alignment_coordinate operator++(int /*post-increment*/) noexcept
        requires (state != advanceable_alignment_coordinate_state::none)
    {
        advanceable_alignment_coordinate tmp{*this};
        ++(*this);
        return tmp;
    }
 
    constexpr advanceable_alignment_coordinate & operator--(/*pre-decrement*/) noexcept
        requires (state != advanceable_alignment_coordinate_state::none)
    {
        if constexpr (state == advanceable_alignment_coordinate_state::column)
            --this->first;
        else
            --this->second;
        return *this;
    }
 
    constexpr advanceable_alignment_coordinate operator--(int /*post-decrement*/) noexcept
        requires (state != advanceable_alignment_coordinate_state::none)
    {
        advanceable_alignment_coordinate tmp{*this};
        --(*this);
        return tmp;
    }
 
    constexpr advanceable_alignment_coordinate & operator+=(difference_type const offset) noexcept
        requires (state != advanceable_alignment_coordinate_state::none)
    {
        if constexpr (state == advanceable_alignment_coordinate_state::column)
            this->first += offset;
        else
            this->second += offset;
        return *this;
    }
 
    constexpr advanceable_alignment_coordinate & operator-=(difference_type const offset) noexcept
        requires (state != advanceable_alignment_coordinate_state::none)
    {
        if constexpr (state == advanceable_alignment_coordinate_state::column)
            this->first -= offset;
        else
            this->second -= offset;
        return *this;
    }
 
    constexpr advanceable_alignment_coordinate operator+(difference_type const offset) const noexcept
        requires (state != advanceable_alignment_coordinate_state::none)
    {
        advanceable_alignment_coordinate tmp{*this};
        tmp += offset;
        return tmp;
    }
 
    constexpr advanceable_alignment_coordinate operator-(difference_type const offset) const noexcept
        requires (state != advanceable_alignment_coordinate_state::none)
    {
        advanceable_alignment_coordinate tmp{*this};
        tmp -= offset;
        return tmp;
    }
 
    constexpr difference_type operator-(advanceable_alignment_coordinate const & other) const noexcept
        requires (state != advanceable_alignment_coordinate_state::none)
    {
        if constexpr (state == advanceable_alignment_coordinate_state::column)
            return this->first - other.first;
        else
            return this->second - other.second;
    }
 
 
    constexpr friend advanceable_alignment_coordinate operator+(difference_type const offset,
                                                                advanceable_alignment_coordinate const & me) noexcept
        requires (state != advanceable_alignment_coordinate_state::none)
    {
        return me + offset;
    }
 
    size_t first{};
    size_t second{};
};
 
} // namespace seqan3::detail
 
namespace seqan3
{
 
template <typename char_t, typename coordinate_type>
    requires detail::is_value_specialisation_of_v<std::remove_cvref_t<coordinate_type>,
                                                  detail::advanceable_alignment_coordinate>
inline debug_stream_type<char_t> & operator<<(debug_stream_type<char_t> & s, coordinate_type && c)
{
    s << std::tie(c.first, c.second);
    return s;
}
 
} // namespace seqan3