59b3f84eb9
Reviewers: mtomic, mferencevic Reviewed By: mferencevic Subscribers: pullbot Differential Revision: https://phabricator.memgraph.io/D2214
66 lines
1.4 KiB
C++
66 lines
1.4 KiB
C++
#pragma once
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#include <optional>
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#include <glog/logging.h>
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namespace storage {
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enum class Error : uint8_t {
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SERIALIZATION_ERROR,
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DELETED_OBJECT,
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VERTEX_HAS_EDGES,
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};
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template <typename TValue>
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class [[nodiscard]] Result final {
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public:
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explicit Result(const TValue &value) : value_(value) {}
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explicit Result(TValue &&value) : value_(std::move(value)) {}
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explicit Result(const Error &error) : error_(error) {}
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bool HasValue() const { return value_.has_value(); }
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bool HasError() const { return error_.has_value(); }
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TValue &GetValue() {
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CHECK(value_) << "The storage result is an error!";
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return *value_;
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}
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const TValue &GetValue() const {
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CHECK(value_) << "The storage result is an error!";
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return *value_;
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}
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TValue &operator*() {
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CHECK(value_) << "The storage result is an error!";
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return *value_;
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}
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const TValue &operator*() const {
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CHECK(value_) << "The storage result is an error!";
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return *value_;
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}
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TValue *operator->() {
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CHECK(value_) << "The storage result is an error!";
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return &*value_;
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}
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const TValue *operator->() const {
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CHECK(value_) << "The storage result is an error!";
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return &*value_;
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}
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Error GetError() const {
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CHECK(error_) << "The storage result is a value!";
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return *error_;
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}
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private:
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std::optional<TValue> value_;
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std::optional<Error> error_;
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};
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} // namespace storage
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