hash.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>
 
namespace std
{
template <typename alphabet_t>
    requires seqan3::semialphabet<alphabet_t>
struct hash<alphabet_t>
{
    size_t operator()(alphabet_t const character) const noexcept
    {
        return seqan3::to_rank(character);
    }
};
 
} // namespace std