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Change Log

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

0.99.18 - 2024-06-15

  • Update syn to version 2.x
  • Bump minimum supported rust version to 1.65

0.99.10 - 2020-09-11

Improvements

  • From supports additional types for conversion: #[from(types(u8, u16))].

0.99.7 - 2020-05-16

Fixes

  • Fix generic derives for MulAssign

Improvements

  • When specifying specific features of the crate to only enable specific derives, the extra-traits feature of syn is not always enabled when those the specified features do not require it. This should speed up compile time of syn when this feature is not needed.

0.99.6 - 2020-05-13

Improvements

  • Make sure output of derives is deterministic, for better support in rust-analyzer

0.99.5 - 2020-03-28

New features

  • Support for deriving Error!!! (many thanks to @ffuugoo and @tyranron)

Fixes

  • Fix generic bounds for Deref and DerefMut with forward, i.e. put Deref bound on whole type, so on where Box<T>: Deref instead of on T: Deref. (#107)

  • The tests directory is now correctly included in the crate (requested by Debian package maintainers)

0.99.4 - 2020-03-28

Note: This version is yanked, because quickly after release it was found out tests did not run in CI.

0.99.3 - 2020-02-19

Fixes

  • Fix generic bounds for Deref and DerefMut with no forward, i.e. no bounds are necessary. (#107)

0.99.2 - 2019-11-17

Fixes

  • Hotfix for a regression in allowed Display derives using # flag, such as {:#b} (#107)

0.99.1 - 2019-11-12

Fixes

  • Hotfix for a regression in allowed From derives (#105)

0.99.0 - 2019-11-11

This release is a huge milestone for this library. Lot's of new derives are implemented and a ton of attributes are added for configuration purposes. These attributes will allow future releases to add features/options without breaking backwards compatibility. This is why the next release with breaking changes is planned to be 1.0.0.

Breaking changes

  • Requires Rust 1.36+
  • When using in a Rust 2015 crate, you should add extern crate core to your code.
  • no_std feature is removed, the library now supports no_std without having to configure any features.
  • Deref derives now dereference to the type in the newtype. So if you have MyBox(Box<i32>), dereferencing it will result in a Box<i32> not an i32. To get the old behaviour of forwarding the dereference you can add the #[deref(forward)] attribute on the struct or field.

New features

  • Derives for AsRef, AsMut, Sum, Product, IntoIterator.
  • Choosing the field of a struct for which to derive the newtype derive.
  • Ignoring variants of enums when deriving From, by using #[from(ignore)].
  • Add #[from(forward)] attribute for From derives. This forwards the from calls to the fields themselves. So if your field is an i64 you can call from on an i32 and it will work.
  • Add #[mul(forward)] and #[mul_assign(forward)], which implement Mul and MulAssign with the semantics as if they were Add/AddAssign.
  • You can use features to cut down compile time of the crate by only compiling the code needed for the derives that you use. (see Cargo.toml for the features, by default they are all on)
  • Add #[into(owned, ref, ref_mut)] and #[try_into(owned, ref, ref_mut)] attributes. These cause the Into and TryInto derives to also implement derives that return references to the inner fields.
  • Make no_std work out of the box
  • Allow #[display(fmt="some shared display text for all enum variants {}")] attribute on enum.
  • Better bounds inference of Display trait.

Other things

  • Remove dependency on regex to cut down compile time.
  • Use syn 1.0

0.15.0 - 2019-06-08

  • Automatic detection of traits needed for Display format strings

0.14.0 - 2019-02-02

  • Added no_std support
  • Suppress unused_variables warnings in derives

0.13.0 - 2018-10-19

  • Updated to syn v0.15
  • Extended Display-like derives to support custom formats

0.12.0 - 2018-09-19

Changed

  • Updated to syn v0.14, quote v0.6 and proc-macro2 v0.4

0.11.0 - 2018-05-12

Changed

  • Updated to latest version of syn and quote

Fixed

  • Changed some URLs in the docs so they were correct on crates.io and docs.rs
  • The Result type is now referenced in the derives using its absolute path (::std::result::Result) to make sure that the derives don't accidentally use another Result type that is in scope.

0.10.0 - 2018-03-29

Added

  • Allow deriving of TryInto
  • Allow deriving of Deref
  • Allow deriving of DerefMut

0.9.0 - 2018-03-18

Added

  • Allow deriving of Display, Binary, Octal, LowerHex, UpperHex, LowerExp, UpperExp, Pointer
  • Allow deriving of Index
  • Allow deriving of IndexMut

Fixed

  • Allow cross crate inlining of derived methods

Internal changes

  • Fix most clippy warnings

0.8.0 - 2018-03-10

Added

  • Allow deriving of FromStr

Changed

  • Updated to latest version of syn and quote

0.7.1 - 2018-01-25

Fixed

  • Add #[allow(missing_docs)] to the Constructor definition

Internal changes

  • Run rustfmt on the code

0.7.0 - 2017-07-25

Changed

  • Changed code to work with newer version of the syn library.

0.6.2 - 2017-04-23

Changed

  • Deriving From, Into and Constructor now works for empty structs.

0.6.1 - 2017-03-08

Changed

  • The new() method that is created when deriving Constructor is now public. This makes it a lot more useful.

0.6.0 - 2017-02-20

Added

  • Derives for Into, Constructor and MulAssign-like

Changed

  • From is now derived for enum variants with multiple fields.

Fixed

  • Derivations now support generics.

0.5.0 - 2017-02-02

Added

  • Lots of docs.
  • Derives for Neg-like and AddAssign-like.

Changed

  • From can now be derived for structs with multiple fields.