search_traits.hpp

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// -----------------------------------------------------------------------------------------------------
// Copyright (c) 2006-2021, Knut Reinert & Freie Universität Berlin
// Copyright (c) 2016-2021, 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/core/detail/empty_type.hpp>
#include <seqan3/search/configuration/max_error.hpp>
#include <seqan3/search/configuration/hit.hpp>
#include <seqan3/search/configuration/on_result.hpp>
#include <seqan3/search/configuration/output.hpp>
#include <seqan3/search/configuration/result_type.hpp>
#include <seqan3/utility/type_traits/basic.hpp>
 
namespace seqan3::detail
{
 
template <typename search_configuration_t>
struct search_traits
{
    using empty_search_result_type = search_result<empty_type, empty_type, empty_type, empty_type>;
    using search_result_type =
        typename std::remove_cvref_t<decltype(std::declval<search_configuration_t>().get_or(
                search_cfg::detail::result_type<empty_search_result_type>{}))
        >::type;
 
    static constexpr bool has_max_error_total =
                                        search_configuration_t::template exists<search_cfg::max_error_total>();
    static constexpr bool has_max_error_substitution =
                                        search_configuration_t::template exists<search_cfg::max_error_substitution>();
    static constexpr bool has_max_error_insertion =
                                        search_configuration_t::template exists<search_cfg::max_error_insertion>();
    static constexpr bool has_max_error_deletion =
                                        search_configuration_t::template exists<search_cfg::max_error_deletion>();
 
    static constexpr bool only_max_error_total = has_max_error_total &&
                                                 !has_max_error_substitution &&
                                                 !has_max_error_insertion &&
                                                 !has_max_error_deletion;
 
    static constexpr bool search_all_hits = search_configuration_t::template exists<search_cfg::hit_all>();
    static constexpr bool search_single_best_hit = search_configuration_t::template exists<search_cfg::hit_single_best>();
    static constexpr bool search_all_best_hits = search_configuration_t::template exists<search_cfg::hit_all_best>();
    static constexpr bool search_strata_hits = search_configuration_t::template exists<search_cfg::hit_strata>();
    static constexpr bool has_hit_configuration = search_all_hits ||
                                                  search_single_best_hit ||
                                                  search_all_best_hits ||
                                                  search_strata_hits ||
                                                  search_configuration_t::template exists<search_cfg::hit>();
 
    static constexpr bool output_query_id = search_configuration_t::template exists<search_cfg::output_query_id>();
    static constexpr bool output_reference_id =
                              search_configuration_t::template exists<search_cfg::output_reference_id>();
    static constexpr bool output_reference_begin_position =
                              search_configuration_t::template exists<search_cfg::output_reference_begin_position>();
    static constexpr bool output_index_cursor =
                              search_configuration_t::template exists<search_cfg::output_index_cursor>();
    static constexpr bool output_requires_locate_call = output_reference_id | output_reference_begin_position;
 
    static constexpr bool has_output_configuration = output_query_id |
                                                     output_reference_id |
                                                     output_reference_begin_position |
                                                     output_index_cursor;
 
    static constexpr bool has_user_callback = search_configuration_t::template exists<search_cfg::on_result>();
};
 
} // namespace seqan3::detail