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6.0.0rc1

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@github-actions github-actions released this 25 Mar 22:56
· 32 commits to master since this release
6.0.0rc1
6423572

  • MAJOR REWRITE: The Python and C implementations of the encoder and decoder were replaced with a single, Rust-based implementation in the interest of maintainability.

    Here are some of the highlights:

    • Improved memory safety (100% safe-mode Rust)
    • Complete elimination of reference leaks
    • Support for free-threading and subinterpreters
    • Substantially improved performance
    • Improved decoder error handling where any non-base exception gets wrapped in a CBORDecodeError
    • Iterative, rather than recursive decoding, meaning the container nesting depth is limited only by the available memory, rather than the C stack size

  • BACKWARD INCOMPATIBLE Changed the signature of the tag_hook decoder callables to accept (CBORTag, immutable as arguments instead of CBORDecoder, CBORTag)

  • BACKWARD INCOMPATIBLE Changed the signature of the object_hook decoder callables to accept (Mapping[Any, Any], bool) instead of (CBORDecoder, dict[Any, Any])

  • BACKWARD INCOMPATIBLE Removed the break_marker singleton as no longer necessary

  • BACKWARD INCOMPATIBLE Removed the CBORDecodeValueError exception, instead chaining ValueError or TypeError to a CBORDecodeError

  • BACKWARD INCOMPATIBLE Changed the decoding of semantic tag 261 to yield an IPv4Interface or IPv6Interface if the address contains host bits

  • BACKWARD INCOMPATIBLE Removed the individual decoding functions from the API as they were mistakenly called directly by users. Please open an issue if you need them back.

  • BACKWARD INCOMPATIBLE Changed the encoding of IP addresses to use the semantic tags 52 and 54 instead of the deprecated 260 and 261 (#232)

  • BACKWARD INCOMPATIBLE Dropped the deprecated cbor2.decoder and cbor2.encoder modules – everything in the API is now importable directly from cbor2

  • BACKWARD INCOMPATIBLE The cbor2.FrozenDict class has now been renamed frozendict and is not available on Python 3.15 where the built-in frozendict class must be used instead

  • Added the semantic_decoders decoder option to add or override decoders for specific semantic tags

  • Added the immutable decoder flag to always use immutable containers where possible when decoding a CBOR stream

  • Added the allow_indefinite decoder option to optionally disallow indefinite-length strings and containers

  • Dropped support for Python 3.9

  • Fixed the decoder not rejecting invalid two-byte simple value sequences (0xF800 - 0xF81F)

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