jeffro256
65 lines
2.3 KiB
C++
65 lines
2.3 KiB
C++
// Copyright (c) 2025, The Monero Project
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#pragma once
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//local headers
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#include "serialization.h"
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//third party headers
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//standard headers
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#include <optional>
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//forward declarations
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// [De]serialize a std::optional<T> as a heterogenous array: either [0], or [1, x], where x is the contained value
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template <bool W, template <bool> class Archive, typename T>
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bool do_serialize(Archive<W> &ar, std::optional<T> &v)
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{
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if constexpr (!W)
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v.reset();
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ar.begin_array();
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uint8_t has_value = v.has_value();
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ar.serialize_int(has_value);
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if (has_value > 1)
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return false; // to prevent malleability
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if (has_value)
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{
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ar.delimit_array();
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if (!do_serialize(ar, v ? *v : v.emplace()))
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return false;
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}
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ar.end_array();
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return ar.good();
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}
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