7b201e9165
Ensure both readers have the same interfaces to avoid mistakes as both readers are used in sstable::make_reader. Less error prone.
28 lines
629 B
C++
28 lines
629 B
C++
/*
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* Copyright (C) 2024-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include <optional>
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template <typename T>
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struct value_or_reference {
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std::optional<T> _opt;
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const T& _ref;
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explicit value_or_reference(T&& v) : _opt(std::move(v)), _ref(*_opt) {}
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explicit value_or_reference(const T& v) : _ref(v) {}
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value_or_reference(value_or_reference&& o) : _opt(std::move(o._opt)), _ref(_opt ? *_opt : o._ref) {}
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value_or_reference(const value_or_reference& o) : _opt(o._opt), _ref(_opt ? *_opt : o._ref) {}
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const T& get() const {
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return _ref;
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}
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};
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