Bug fixes

• binrw is now future-compatible with pub_use_of_private_extern_crate. (#361. Thanks, @jakobhellermann!)

Changes

• The rarely-used variadic signature for #[binrw::parser] and #[binrw::writer] helper functions now requires a field name (i.e. fn foo(...) must now be fn foo(_: ...) so that the Rust compiler team can do good things. (#342)

Breaking changes

• The generic parameter lists for binrw::helpers functions have been reordered to put most-frequently-used parameters first.
• Lifetime parameters have been added to several binrw::helpers functions to support borrowed arguments.
• The MSRV has been increased to 1.70.
• Parsing a unit enum with magic will now return an Io(UnexpectedEof) error when all attempts to read magic result in an UnexpectedEof. Previously, this would return NoVariantMatch. (#324, #325. Thanks, @plaflamme!)

Enhancements

• PosValue now includes implementations for Default and BinWrite. The BinWrite implementation simply treats PosValue as a wrapper and writes the stored value in place; the pos field is ignored. Use the seek_before and (optionally) restore_position directives if you want to write a PosValue value to a different position in the output stream. (#270, #273. Thanks, @amirbou!)
• binrw now uses syn 2 internally, which should reduce the build time for most users of binrw when used with other dependencies that have also updated to syn 2. (#285, #299. Thanks, @Urist-McGit!)
• The amount of code generated has been reduced, improving compilation times. (#319. Thanks, @ScanMountGoat!)
• Various small documentation improvements. (Thanks, @marxin!)
• BinWrite::write_ne and BinWrite::write_ne_args convenience functions have been added to match the same functions in the BinRead API.
• The owo-colors dependency has been updated to version 4.

Bug fixes

• Using SeekFrom::End with TakeSeek now correctly seeks relative to the end of the stream if the stream is shorter than the limit. (#291)
• Using binrw::helpers::count_with to return a Vec<{integer}> using a custom function will no longer ignore the custom function. (#318. Thanks, @kitlith!)
• It is now possible to pass borrowed values when using binrw::helpers functions.
• The args directive can now be used when closures are passed to parse_with or write_with.
• All forwarding calls in the BinReadExt and BinWriteExt traits are now appropriately annotated with #[inline].

Bug fixes

• Passing a SeekFrom::End to TakeSeek::seek now correctly seeks from the end of the TakeSeek stream instead of the end of the inner stream. (#291)

Breaking changes

• In derived BinWrite implementations, imported variables are now exposed before field variables, to match the way lexical scoping normally works. If an import and a field have the same name, this will cause the import to be shadowed. Previously, the field would be shadowed.

Enhancements

• Diagnostic output is improved when using parse_with and map together in an incompatible way.

Bug fixes

• It is now possible to use a mix of generic and concrete types in BinWrite derives without triggering a type mismatch error.
• It is now possible to use the anonymous lifetime '_ within nested types inside an import directive. (#241)
• The compiler will no longer panic when verbose-backtrace is enabled and a derived type contains a docblock with a completely empty line. (#263)
• Generated code will no longer trigger clippy::unnecessary_fallible_conversions lints.

Bug fixes

• Using parse_with/write_with, map_stream, and args together will no longer raise an error about incompatible stream types. (#240)