seqan/3-master-user/hash_8hpp_source.html

// SPDX-FileCopyrightText: 2006-2024 Knut Reinert & Freie Universität Berlin

// SPDX-FileCopyrightText: 2016-2024 Knut Reinert & MPI für molekulare Genetik

// SPDX-License-Identifier: BSD-3-Clause


#pragma once


#include <seqan3/alphabet/adaptation/all.hpp> // https://github.com/seqan/seqan3/issues/3015


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

all.hpp
Meta-header for the Alphabet / Adaptation submodule .

seqan3::to_rank
constexpr auto to_rank
Return the rank representation of a (semi-)alphabet object.
Definition alphabet/concept.hpp:152

std::hash

semialphabet
The basis for seqan3::alphabet, but requires only rank interface (not char).

std
SeqAn specific customisations in the standard namespace.

std::hash< alphabet_t >::operator()
size_t operator()(alphabet_t const character) const noexcept
Compute the hash for a character.
Definition hash.hpp:34