ddd36de0ff
When a value_view needs to store a temporarily instantiated object, it can use the new variant field. The temporary value will live only as long as the view itself.
70 lines
2.1 KiB
C++
70 lines
2.1 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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#include "cql3/values.hh"
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namespace cql3 {
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std::ostream& operator<<(std::ostream& os, const raw_value_view& value) {
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seastar::visit(value._data, [&] (fragmented_temporary_buffer::view v) {
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os << "{ value: ";
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using boost::range::for_each;
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for_each(v, [&os] (bytes_view bv) { os << bv; });
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os << " }";
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}, [&] (null_value) {
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os << "{ null }";
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}, [&] (unset_value) {
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os << "{ unset }";
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});
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return os;
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}
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raw_value_view raw_value::to_view() const {
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switch (_data.index()) {
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case 0: return raw_value_view::make_value(fragmented_temporary_buffer::view(bytes_view{std::get<bytes>(_data)}));
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case 1: return raw_value_view::make_null();
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default: return raw_value_view::make_unset_value();
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}
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}
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raw_value raw_value::make_value(const raw_value_view& view) {
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if (view.is_null()) {
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return make_null();
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}
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if (view.is_unset_value()) {
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return make_unset_value();
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}
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return make_value(linearized(*view));
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}
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raw_value_view raw_value_view::make_temporary(raw_value&& value) {
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if (!value) {
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return raw_value_view::make_null();
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}
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return raw_value_view(std::move(value).extract_value());
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}
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raw_value_view::raw_value_view(bytes&& tmp) {
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_temporary_storage = make_lw_shared<bytes>(std::move(tmp));
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_data = fragmented_temporary_buffer::view(bytes_view(*_temporary_storage));
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}
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} |