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Class Uuid (2.40.0) | C++ Client Libraries

Skip to main content Class Uuid (2.40.0)

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A representation of the Spanner UUID type: A 16-byte value that can be represented as a 32-digit hexadecimal string.

Constructors Uuid(Uuid &&)

Regular value type, supporting copy, assign, move.

Parameter Name Description Uuid &&
Uuid(Uuid const &)

Regular value type, supporting copy, assign, move.

Parameter Name Description Uuid const &
Uuid()

Default construction yields a zero value UUID.

Uuid(absl::uint128)

Construct a UUID from one unsigned 128-bit integer.

Parameter Name Description uuid absl::uint128
Uuid(std::uint64_t, std::uint64_t)

Construct a UUID from two unsigned 64-bit integers.

Parameters Name Description high_bits std::uint64_t
low_bits std::uint64_t
Operators operator=(Uuid &&)

Regular value type, supporting copy, assign, move.

Parameter Name Description Uuid &&
Returns Type Description Uuid & operator=(Uuid const &)

Regular value type, supporting copy, assign, move.

Parameter Name Description Uuid const &
Returns Type Description Uuid & operator absl::uint128() const

Conversion to one 128-bit unsigned integer.

operator std::string() const

Conversion to an 8-4-4-4-12 format (lower-case) string.

Example: 0b6ed04c-a16d-fc46-5281-7f9978c13738

Functions As64BitPair() const

Conversion to two unsigned 64-bit integers.

Returns Type Description std::pair< std::uint64_t, std::uint64_t >

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.

Last updated 2025-08-14 UTC.

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