This enumerates the supported Curl serialization protocols.

The value of each enum is used as a "magic" number that is written out at the start serialized data to identify the version of Curl serialization protocol currently in use.

The version-4-0 protocol was first introduced with the Curl 4.0, the version-6-0 protocol in Curl 6.0, and so on.

Note that SerializationProtocol enums are not intended to be serialized themselves!

version-4-0

The original version of the protocol, in use in Curl 4.0 and 5.0.

Cannot serialize new types (see below).

version-6-0

Introduced in Curl 6.0.

• Adds support for new types introduced in 6.0: uint, uint64 and value classes.
• Supports compact FastArray-of format. See SerializeCode.compact-fast-array.
• Supports write-one-compact/ read-one-compact.
• More compact representation of null values. See SerializeCode.null-value.
• Supports ability to disable interning of individual values through SerializeOutputStream.do-not-share-next.

Introduced in: version 6.0