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Class Uuid (2.42.0-rc) | C++ Client Libraries

Skip to main content Class Uuid (2.42.0-rc)

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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 >

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Last updated 2025-08-14 UTC.

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