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9153f63135
In the next patch we will want to use these concepts in `mutation.hh`. To avoid pulling in the entire `flat_mutation_reader.hh` just for these, and create a circular dependency in doing so, move them to a dedicated header instead.
49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
/*
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* Copyright (C) 2021 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "mutation_fragment.hh"
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template<typename Consumer>
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concept FlatMutationReaderConsumer =
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requires(Consumer c, mutation_fragment mf) {
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{ c(std::move(mf)) } -> std::same_as<stop_iteration>;
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} || requires(Consumer c, mutation_fragment mf) {
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{ c(std::move(mf)) } -> std::same_as<future<stop_iteration>>;
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};
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template<typename T>
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concept FlattenedConsumer =
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StreamedMutationConsumer<T> && requires(T obj, const dht::decorated_key& dk) {
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{ obj.consume_new_partition(dk) };
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{ obj.consume_end_of_partition() };
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};
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template<typename T>
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concept FlattenedConsumerFilter =
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requires(T filter, const dht::decorated_key& dk, const mutation_fragment& mf) {
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{ filter(dk) } -> std::same_as<bool>;
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{ filter(mf) } -> std::same_as<bool>;
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{ filter.on_end_of_stream() } -> std::same_as<void>;
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};
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