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# Changelog
Notable changes to this crate will be documented in this file.
The format is based on [Keep a Changelog](
https://keepachangelog.com/en/1.
0.
0/).
## Unreleased - YYYY-MM-DD
##
4.
1.
0 -
2025-
01-
22
### Added
* Added `Encoding::size`, which computes the size of the encoded type for the
current target.
### Changed
* Equivalence comparisons now consider `Encoding::Class`, `Encoding::Object`
and `Encoding::Block` as equivalent.
##
4.
0.
3 -
2024-
05-
21
### Fixed
* Fixed an issue with publishing using an older version of Cargo that didn't
handle the `lints.workspace = true` Cargo setup properly.
##
4.
0.
2 -
2024-
05-
21 (Yanked)
### Added
* Added `Encoding::None`, which represents encodings where the host compiler
(i.e. `clang`) couldn't generate an encoding for a given type.
This is useful when working with SIMD types.
##
4.
0.
1 -
2024-
04-
17
### Changed
* Build documentation on docs.rs on more Apple platforms.
##
4.
0.
0 -
2023-
12-
03
### Changed
* **BREAKING**: Changed the type of `EncodingBox::Struct` and
`EncodingBox::Union` to no longer contain an `Option`.
### Fixed
* Fixed encoding equivalence between empty structs and unions.
* Parse (and ignore) extended type information.
##
3.
0.
0 -
2023-
07-
31
### Fixed
* Bumped version number to ensure that this crate can be compiled together
with code that depends on pre-releases of `
2.
0.
0`.
##
2.
0.
0 -
2023-
06-
20
### Added
* Improved documentation slightly.
##
2.
0.
0-pre.
4 -
2023-
02-
07
### Added
* Made the crate `no_std` compatible.
* Made the crate platform-agnostic.
### Changed
* **BREAKING**: Moved the `Encode`, `RefEncode`, `EncodeArguments`,
`EncodeConvert`, `OptionEncode` to `objc2`.
* **BREAKING**: `Encoding::BitField` now allows omitting the type using an
`Option`.
* **BREAKING**: Changed length field in `Encoding::Array` from `usize` to
`u64` (to be platform-agnostic).
### Fixed
* Fixed `Encoding::BitField` encoding parsing.
##
2.
0.
0-pre.
3 -
2022-
12-
24
### Added
* Added `EncodingBox` for dynamically parsing encodings and creating them on
the heap.
* Added `ParseError`, a custom type that represents errors during encoding
parsing.
* Added `Encoding::equivalent_to_box` for comparing `Encoding` and
`EncodingBox`.
* Implemented `Encode` and `RefEncode` for `NonNull<c_void>`.
* Added `OptionEncode` to help with implementing `Encode` and `RefEncode` for
`Option`.
### Changed
* **BREAKING**: Verify that the name in `Encoding::Struct` and
`Encoding::Union` is a valid C identifier.
### Removed
* **BREAKING**: `Encoding` no longer implements `Copy`, though it is still
`Clone`.
* **BREAKING**: Removed `Encoding::equivalent_to_start_of_str`, since it
wasn't really useful.
##
2.
0.
0-pre.
2 -
2022-
08-
28
### Added
* Added `EncodeConvert` trait to help with correctly handling `BOOL`/`bool`.
### Changed
* **BREAKING**: Remove the lifetime specifier from `Encoding`, since the non
-`'static` version was essentially useless.
### Fixed
* Fixed the encoding output and comparison of structs behind pointers.
### Removed
* **BREAKING**: `bool` (and `AtomicBool`) no longer implements `Encode`, since
that was difficult to use correctly. See the `EncodeConvert` trait, or use
`objc2::runtime::Bool` instead.
##
2.
0.
0-pre.
1 -
2022-
07-
19
### Added
* Added `Encoding::Atomic`.
* Implement `Encode` and `RefEncode` for `std::sync::atomic` types.
### Changed
* **BREAKING**: Renamed `Encoding::C_U_LONG` to `Encoding::C_ULONG`.
##
2.
0.
0-pre.
0 -
2022-
06-
13
### Added
* Added `Encoding::C_LONG` and `Encoding::C_U_LONG` to help with platform
compatibility; use these instead of `c_long::ENCODING` and
`c_ulong::ENCODING`.
* Implement `Encode` and `RefEncode` for `MaybeUninit<T>`, where `T` is
properly bound.
### Changed
* **BREAKING**: Sealed the `EncodeArguments` trait.
* **BREAKING**: Add type argument to `Encoding::BitField`.
### Removed
* **BREAKING**: Removed `PartialEq` impl between `str` and `Encoding` since it
was incorrect (it violated the trait requirements).
* **BREAKING**: Removed `Encode` and `RefEncode` implementations for `Pin`
since it may not be sound.
##
2.
0.
0-beta.
2 -
2022-
01-
03
### Added
* Implement `Hash` for `Encoding`.
### Changed
* Improved documentation.
##
2.
0.
0-beta.
1 -
2021-
12-
22
### Added
* `Encoding::equivalent_to`, `Encoding::equivalent_to_str` and
`Encoding::equivalent_to_start_of_str` methods for more precise comparison
semantics.
* Added `Encode` and `RefEncode` implementations for `Option` function
pointers.
### Changed
* Discourage comparing `str` with `Encoding` using `PartialEq`. This trait
impl might get removed in a future version.
##
2.
0.
0-beta.
0 -
2021-
11-
22
### Added
* **BREAKING**: Add `Encoding::LongDouble`, `Encoding::FloatComplex`,
`Encoding::DoubleComplex` and `Encoding::LongDoubleComplex`.
* Implement `RefEncode` for all number types that implement `Encode` (`bool`,
`i8`, `usize`, `f32`, `NonZeroU32`, and so on).
* Implement `RefEncode` for `*const c_void` and `*mut c_void` (allowing
`void**` in C).
* Implement `Encode` and `RefEncode` for `Wrapping<T>`, where `T` is properly
bound.
### Changed
* **BREAKING**: Make `Encoding` `#[non_exhaustive]`. This will help us in
evolving the API while minimizing further breaking changes.
* Discourage using `bool::ENCODING`; use `objc2::Bool::ENCODING` instead.
* Discourage using `()::ENCODING` for anything other than as a function return
type.
##
2.
0.
0-alpha.
1 -
2021-
09-
01
### Added
* Improved documentation.
* Add `RefEncode` trait, which represents types whose pointers has an
encoding. This means you now only have to implement `RefEncode`, and not
both `&Encode` and `&mut Encode`.
Additionally, encodings of pointers to pointers (to pointers, and so on) are
now supported.
* Implement `Encode` for `NonZeroX` and `Option<NonZeroX>` integer types.
* Implement `RefEncode` for arrays.
* Implement `Encode` and `RefEncode` for (where `T` is properly bound):
- `ManuallyDrop<T>`
- `Pin<T>`
- `NonNull<T>`
- `Option<NonNull<T>>`
* Add `EncodeArguments` trait, to represent an ordered group of functions
arguments, where each argument has an Objective-C type-encoding.
Previously in the `objc` crate.
* Implement `Encode` and `RefEncode` for some `extern "C" fn` pointers.
### Removed
* **BREAKING**: Removed automatic `*const T: Encode` and `*mut T: Encode`
impls when when `&T: Encode` and `&mut T: Encode` was implemented.
Implement `T: RefEncode` instead!
##
2.
0.
0-alpha.
0 -
2021-
09-
01
### Added
* Improved documentation.
* Support for targets with pointer-width
16
* Implement `Encode` for all array lengths using const-generics.
* Implement `Encode` for unsized pointer types as well.
### Changed
* **BREAKING**: Forked the project, so it is now available under the name
`objc2-encode`.
* **BREAKING**: Changed type in `Encoding::BitField` from `u32` to `u8`.
* **BREAKING**: Changed type in `Encoding::Array` from `u32` to `usize`.
* **BREAKING**: Loosen `'static` bounds on references implementing `Encode`.
## [
1.
1.
0] (`objc-encode` crate) -
2019-
10-
16
### Added
* Implement `Encode` for arrays with up to
32 elements.
### Changed
* Simplify internal encoding comparison.
## [
1.
0.
0] (`objc-encode` crate) -
2019-
03-
25
### Added
* Implement `PartialEq` between `Encoding` and `&str`.
### Changed
* **BREAKING**: Make `Encoding` an enum instead of a trait, yielding a vastly
different design. This makes use of associated constants.
* **BREAKING**: Rename `Encode::CODE` to `Encode::ENCODING`.
* Update to Rust
2018.
### Removed
* `libc` dependency.
## [
0.
0.
3] (`objc-encode` crate) -
2017-
04-
30
### Fixed
* Compilation on versions prior to Rust `
1.
15`.
## [
0.
0.
2] (`objc-encode` crate) -
2017-
02-
20
### Added
* **BREAKING**: `Display` requirement for encodings.
* Implement `PartialEq` for encodings.
* Implement `Encode` for pointers when references do.
### Fixed
* `IndexEncodingsComparator`.
* Compilation with older Rust versions.
## [
0.
0.
1] (`objc-encode` crate) -
2017-
02-
19
Initial version.
[
1.
1.
0]:
https://github.com/madsmtm/objc2/compare/objc-encode-1.
0.
0...objc-encode
-1.1.0
[1.0.0]: https://github.com/madsmtm/objc2/compare/objc-encode-0.0.3...objc-encode-1.0.0
[0.0.3]: https://github.com/madsmtm/objc2/compare/objc-encode-0.0.2...objc-encode-0.0.3
[0.0.2]: https://github.com/madsmtm/objc2/compare/objc-encode-0.0.1...objc-encode-0.0.2
[0.0.1]: https://github.com/madsmtm/objc2/releases/tag/objc-encode-0.0.1