gap.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 <cassert>
 
#include <seqan3/alphabet/alphabet_base.hpp>
 
namespace seqan3
{
 
class gap : public alphabet_base<gap, 1, char>
{
private:
    using base_t = alphabet_base<gap, 1, char>;
 
    friend base_t;
 
    static constexpr char_type rank_to_char(rank_type const)
    {
        return '-';
    }
 
    static constexpr rank_type char_to_rank(char_type const)
    {
        return 0;
    }
 
public:
    constexpr gap() noexcept : base_t{}
    {}                                                
    constexpr gap(gap const &) = default;             
    constexpr gap(gap &&) = default;                  
    constexpr gap & operator=(gap const &) = default; 
    constexpr gap & operator=(gap &&) = default;      
    ~gap() = default;                                 
 
    using base_t::base_t;
};
 
} // namespace seqan3
    constexpr gap(gap const &) = default;              {…}
class gap : public alphabet_base<gap, 1, char> {…};