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Allows for using PG.OID type in parameterized queries and reading them from result sets.
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| // Copyright 2023 Google LLC | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // https://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| #ifndef GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_SPANNER_OID_H | ||
| #define GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_SPANNER_OID_H | ||
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| #include "google/cloud/spanner/version.h" | ||
| #include <cstdint> | ||
| #include <ostream> | ||
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| namespace google { | ||
| namespace cloud { | ||
| namespace spanner { | ||
| GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_BEGIN | ||
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| /** | ||
| * A representation of the PostgreSQL Object Identifier (OID) type: used as | ||
| * primary keys for various system tables in the PostgreSQL dialect. | ||
| */ | ||
| class PgOid { | ||
| public: | ||
| /// Default construction yields OID 0. | ||
| PgOid() : rep_(0) {} | ||
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| /// @name Regular value type, supporting copy, assign, move. | ||
| ///@{ | ||
| PgOid(PgOid const&) = default; | ||
| PgOid& operator=(PgOid const&) = default; | ||
| PgOid(PgOid&&) = default; | ||
| PgOid& operator=(PgOid&&) = default; | ||
| ///@} | ||
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| /** | ||
| * Construction from an OID unsigned four-byte integer. | ||
| */ | ||
| explicit PgOid(std::uint64_t value) : rep_(value) {} | ||
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| /// @name Conversion to an OID unsigned four-byte integer. | ||
| ///@{ | ||
| explicit operator std::uint64_t() const { return rep_; } | ||
| ///@} | ||
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| /// @name Relational operators | ||
| ///@{ | ||
| friend bool operator==(PgOid const& lhs, PgOid const& rhs) { | ||
| return lhs.rep_ == rhs.rep_; | ||
| } | ||
| friend bool operator!=(PgOid const& lhs, PgOid const& rhs) { | ||
| return !(lhs == rhs); | ||
| } | ||
| ///@} | ||
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| private: | ||
| std::uint64_t rep_; | ||
| }; | ||
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| /// Outputs an OID to the provided stream. | ||
| inline std::ostream& operator<<(std::ostream& os, PgOid const& oid) { | ||
| return os << static_cast<std::uint64_t>(oid); | ||
| } | ||
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| GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END | ||
| } // namespace spanner | ||
| } // namespace cloud | ||
| } // namespace google | ||
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| #endif // GOOGLE_CLOUD_CPP_GOOGLE_CLOUD_SPANNER_OID_H |
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