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dd0d4ae217
Using these instead of using the absl headers directly adds support for heterogeneous lookup with sstring as key. The is no gain from having the hash function inline, so this implements it in a .cc file. Signed-off-by: Rafael Ávila de Espíndola <espindola@scylladb.com>
48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
/*
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* Copyright (C) 2020 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 <absl/container/flat_hash_map.h>
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#include <seastar/core/sstring.hh>
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using namespace seastar;
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struct sstring_hash {
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using is_transparent = void;
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size_t operator()(std::string_view v) const noexcept;
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};
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struct sstring_eq {
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using is_transparent = void;
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bool operator()(std::string_view a, std::string_view b) const noexcept {
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return a == b;
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}
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};
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template <typename K, typename V, typename... Ts>
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struct flat_hash_map : public absl::flat_hash_map<K, V, Ts...> {
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};
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template <typename V>
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struct flat_hash_map<sstring, V>
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: public absl::flat_hash_map<sstring, V, sstring_hash, sstring_eq> {};
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