auto_enums 0.7.11

A library for to allow multiple return types by automatically generated enum.
Documentation 
# Changelog

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

This project adheres to [Semantic Versioning](https://semver.org).

## [Unreleased]

## [0.7.11] - 2020-12-23

* [Add support for `tokio1::{AsyncRead, AsyncWrite, AsyncSeek, AsyncBufRead}`.](https://github.com/taiki-e/auto_enums/pull/122)

## [0.7.10] - 2020-11-15

* Documentation improvements.

## [0.7.9] - 2020-11-06

* Update `derive_utils` to 0.11.

## [0.7.8] - 2020-10-16

* [Add support for `tokio03::{AsyncRead, AsyncWrite, AsyncSeek, AsyncBufRead}`.](https://github.com/taiki-e/auto_enums/pull/114)

## [0.7.7] - 2020-09-21

* [Fix panic when multiple errors occur.](https://github.com/taiki-e/auto_enums/pull/111)

* Diagnostic improvements.

## [0.7.6] - 2020-09-18

* [`type_analysis` feature can now support impl trait in bindings.](https://github.com/taiki-e/auto_enums/pull/108)

  ```rust
  #[auto_enum]
  fn foo(x: i32) {
    // Unlike `feature(impl_trait_in_bindings)`, this works on stable compilers.
    #[auto_enum]
    let iter: impl Iterator<Item = i32> = match x {
        0 => Some(0).into_iter(),
        _ => 0..x,
    };
  }
  ```

## [0.7.5] - 2020-06-03

* Updated `derive_utils` to 0.10.

## [0.7.4] - 2020-05-07

* [Fixed an issue that `#[auto_enum]` on non-statement expression does not work without unstable features.][97]

[97]: https://github.com/taiki-e/auto_enums/pull/97

## [0.7.3] - 2020-04-19

* [Added support for `tokio02::{AsyncRead, AsyncWrite, AsyncSeek, AsyncBufRead}`.][92]

* [Added support for `tokio01::{AsyncRead, AsyncWrite}`.][92]

* [Added `futures03` feature. This is an alias of `futures` feature.][92]

[92]: https://github.com/taiki-e/auto_enums/pull/92

## [0.7.2] - 2020-04-13

* [Fix unused braces warnings.][88]

* Update to support latest generator.

[88]: https://github.com/taiki-e/auto_enums/pull/88

## [0.7.1] - 2019-11-16

* Updated to support `futures` 0.3.0. (futures feature is no longer unstable)

## [0.7.0] - 2019-10-20

* [Support `#[nested]` for nested if expressions.][67]

* Fixed bugs of `"type_analysis"` feature.

* [Removed unstable `"exact_size_is_empty"`, `"read_initializer"`, and `"try_trait"` crate features.][69]

[67]: https://github.com/taiki-e/auto_enums/pull/67
[69]: https://github.com/taiki-e/auto_enums/pull/69

## [0.6.4] - 2019-09-28

* Updated to support `futures-preview` 0.3.0-alpha.19.

## [0.6.3] - 2019-09-20

* [Removed usage of mutable global state from `#[auto_enum]` for forward compatibility.][60] See also [rust-lang/rust#63831].

[60]: https://github.com/taiki-e/auto_enums/pull/60
[rust-lang/rust#63831]: https://github.com/rust-lang/rust/pull/63831

## [0.6.2] - 2019-09-08

* Fixed links to generated code.

## [0.6.1] - 2019-09-08

* Documentation improvements.

## [0.6.0] - 2019-09-07

* [Added `"unstable"` crate feature to separate unstable features from stable features.][56] When using features that depend on unstable APIs, the `"unstable"` feature must be explicitly enabled.

* Improved compile time.

* Renamed `#[rec]` to `#[nested]`.

* [Removed `marker(name)` option in favor of `marker = name`.][55]

* [Removed `never` option in argument position in favor of `#[enum_derive]` attribute.][48]

* [Removed `"proc_macro"` crate feature.][54]

* Added `"ops"` crate feature, and made `[std|core]::ops`'s `Deref`, `DerefMut`, `Index`, `IndexMut`, and `RangeBounds` traits optional.

* Added `"convert"` crate feature, and made `[std|core]::convert`'s `AsRef` and `AsMut` traits optional.

* Added `"generator_trait"` crate feature, and made `[std|core]::ops::Generator` traits optional. *(nightly-only)*

* Added `"fn_traits"` crate feature, and made `Fn`, `FnMut`, and `FnOnce` traits optional. *(nightly-only)*

* Added `"trusted_len"` crate feature, and made `[std|core]::iter::TrustedLen` traits optional. *(nightly-only)*

* Diagnostic improvements.

(There are no changes since the 0.6.0-alpha.3 release.)

## [0.6.0-alpha.3] - 2019-09-06

* [Added `"unstable"` crate feature to separate unstable features from stable features.][56] When using features that depend on unstable APIs, the `"unstable"` feature must be explicitly enabled.

[56]: https://github.com/taiki-e/auto_enums/pull/56

## [0.6.0-alpha.2] - 2019-08-30

* [Removed `marker(name)` option in favor of `marker = name`.][55]

* [Removed `"proc_macro"` crate feature.][54]

[54]: https://github.com/taiki-e/auto_enums/pull/54
[55]: https://github.com/taiki-e/auto_enums/pull/55

## [0.6.0-alpha.1] - 2019-08-24

* Renamed `#[rec]` to `#[nested]`.

* [Removed `never` option in argument position in favor of `#[enum_derive]` attribute.][48]

* Improved compile time.

* Added `"ops"` crate feature, and made `[std|core]::ops`'s `Deref`, `DerefMut`, `Index`, `IndexMut`, and `RangeBounds` traits optional.

* Added `"convert"` crate feature, and made `[std|core]::convert`'s `AsRef` and `AsMut` traits optional.

* Added `"generator_trait"` crate feature, and made `[std|core]::ops::Generator` traits optional. *(nightly-only)*

* Added `"fn_traits"` crate feature, and made `Fn`, `FnMut`, and `FnOnce` traits optional. *(nightly-only)*

* Added `"trusted_len"` crate feature, and made `[std|core]::iter::TrustedLen` traits optional. *(nightly-only)*

* Diagnostic improvements.

[48]: https://github.com/taiki-e/auto_enums/pull/48

## [0.5.10] - 2019-08-15

* Updated `proc-macro2`, `syn`, and `quote` to 1.0.

* Updated `derive_utils` to 0.9. This improves the error message.

* Added some generated code examples.

## [0.5.9] - 2019-07-07

* Updated to support `futures-preview` 0.3.0-alpha.17.

* Added some generated code examples.

## [0.5.8] - 2019-05-22

* Added support for `futures::io::{AsyncSeek, AsyncBufRead}`.

## [0.5.7] - 2019-05-12

* Updated to new nightly. `iovec` stabilized. `#[enum_derive]` automatically detects the rustc version and supports `Read::read_vectored` and `Write::write_vectored` as the part of `Read` and `Write`.

* Supported for latest `futures` 0.3.0-alpha.16.

## [0.5.6] - 2019-04-16

* Updated to new nightly. `futures_api` stabilized.

## [0.5.5] - 2019-03-29

* Fixed trait support in `"type_analysis"` feature.

## [0.5.4] - 2019-03-14

* Fixed the problem that `"failed to resolve: use of undeclared type or module"` (E0433) error is shown when one or more compilation errors occur when multiple `#[auto_enum]` attributes are used.

* Improved the error message of `#[enum_derive]` attribute.

* Updated minimum `derive_utils` version to 0.7.0. This improves the error message.

## [0.5.3] - 2019-03-13

* Greatly improved the error message of `#[auto_enum]` attribute.

## [0.5.2] - 2019-03-10

* Added some generated code examples.

* Added `"iovec"` crate feature. This supports the unstable `iovec` feature ([rust-lang/rust#58452](https://github.com/rust-lang/rust/issues/58452)).

* Updated minimum `syn` version to 0.15.29. This fixes some warnings.

## [0.5.1] - 2019-03-03

* Fixed examples and some sentence in README.md.

## [0.5.0] - 2019-03-03

* Transition to Rust 2018. With this change, the minimum required version will go up to Rust 1.31.

* Reduced the feature of `"std"` crate feature. The current `"std"` crate feature only determines whether to enable `std` library's traits (e.g., `std::io::Read`) support. `"std"` crate feature is enabled by default, but you can reduce compile time by disabling this feature.

* Fixed problem where "macro attributes must be placed before `#[derive]`" error occurred when `#[enum_derive]` attribute was used with other attributes.

* No longer need `#[macro_use] extern crate auto_enums;`. You can use `#[auto_enum]` attribute by `use auto_enums::auto_enum;`.

* Removed `"unstable"` crate feature.

## [0.4.1] - 2019-02-21

* Updated to new nightly.

* Added some generated code examples.

* Updated minimum `derive_utils` version to 0.6.3.

* Updated minimum `syn` version to 0.15.22.

* Updated minimum `smallvec` version to 0.6.9.

## [0.4.0] - 2019-01-30

* Added support for `?` operator in functions and closures.

* Added support for `[core|std]::ops::Generator`.

## [0.3.8] - 2019-01-26

* Updated minimum `derive_utils` version to 0.6.1.

* Updated minimum `smallvec` version to 0.6.8.

## [0.3.7] - 2019-01-26

* Fixed bug of closure support.

## [0.3.6] - 2019-01-19

* Parentheses and type ascription can now be searched recursively.

## [0.3.5] - 2019-01-09

* Improved performance of `#[auto_enum]` attribute.

* Updated minimum `derive_utils` version to 0.6.0.

## [0.3.4] - 2019-01-06

* Added support for `futures::{AsyncRead, AsyncWrite}`.

## [0.3.3] - 2019-01-04

* Updated minimum `derive_utils` version to 0.5.4.

## [0.3.2] - 2018-12-27

* Improved error messages.

* Updated minimum `derive_utils` version to 0.5.3.

## [0.3.1] - 2018-12-26

* Updated minimum `derive_utils` version to 0.5.1. This includes support to stable Pin API.

## [0.3.0] - 2018-12-24

* Added support for `break` in loop. This includes support for nested loops and labeled `break`.

* Changed `#[enum_derive(Error)]` implementation. [The code generated by the new implementation](docs/supported_traits/std/error.md).

* Removed `"error_cause"` crate feature.

* Updated minimum `derive_utils` version to 0.5.0.

## [0.2.1] - 2018-12-22

* Updated minimum `derive_utils` version to 0.4.0.

## [0.2.0] - 2018-12-20

* Added support for `return` in function and closure.

* Added `"fmt"` crate feature, and made `[std|core]::fmt`'s traits other than `Debug`, `Display` and `Write` optional.

## [0.1.3] - 2018-12-15

* Changed `#[enum_derive(Error)]` implementation. In Rust 1.33, `Error::cause` is deprecated. In the new implementation, `Error::cause` is optional for Rust 1.33 and later. In versions less than 1.33, `Error::cause` is always implemented.

## [0.1.2] - 2018-12-15

* Moved features of derive/utils to [derive_utils](https://github.com/taiki-e/derive_utils).

* Aligned version number of `auto_enumerate` and `auto_enums`.

## 0.1.1 - 2018-12-13

* Renamed from `auto_enumerate` to `auto_enums`.

## 0.1.0 - 2018-12-09

Initial release

[Unreleased]: https://github.com/taiki-e/auto_enums/compare/v0.7.11...HEAD
[0.7.11]: https://github.com/taiki-e/auto_enums/compare/v0.7.10...v0.7.11
[0.7.10]: https://github.com/taiki-e/auto_enums/compare/v0.7.9...v0.7.10
[0.7.9]: https://github.com/taiki-e/auto_enums/compare/v0.7.8...v0.7.9
[0.7.8]: https://github.com/taiki-e/auto_enums/compare/v0.7.7...v0.7.8
[0.7.7]: https://github.com/taiki-e/auto_enums/compare/v0.7.6...v0.7.7
[0.7.6]: https://github.com/taiki-e/auto_enums/compare/v0.7.5...v0.7.6
[0.7.5]: https://github.com/taiki-e/auto_enums/compare/v0.7.4...v0.7.5
[0.7.4]: https://github.com/taiki-e/auto_enums/compare/v0.7.3...v0.7.4
[0.7.3]: https://github.com/taiki-e/auto_enums/compare/v0.7.2...v0.7.3
[0.7.2]: https://github.com/taiki-e/auto_enums/compare/v0.7.1...v0.7.2
[0.7.1]: https://github.com/taiki-e/auto_enums/compare/v0.7.0...v0.7.1
[0.7.0]: https://github.com/taiki-e/auto_enums/compare/v0.6.4...v0.7.0
[0.6.4]: https://github.com/taiki-e/auto_enums/compare/v0.6.3...v0.6.4
[0.6.3]: https://github.com/taiki-e/auto_enums/compare/v0.6.2...v0.6.3
[0.6.2]: https://github.com/taiki-e/auto_enums/compare/v0.6.1...v0.6.2
[0.6.1]: https://github.com/taiki-e/auto_enums/compare/v0.6.0...v0.6.1
[0.6.0]: https://github.com/taiki-e/auto_enums/compare/v0.6.0-alpha.3...v0.6.0
[0.6.0-alpha.3]: https://github.com/taiki-e/auto_enums/compare/v0.6.0-alpha.2...v0.6.0-alpha.3
[0.6.0-alpha.2]: https://github.com/taiki-e/auto_enums/compare/v0.6.0-alpha.1...v0.6.0-alpha.2
[0.6.0-alpha.1]: https://github.com/taiki-e/auto_enums/compare/v0.5.10...v0.6.0-alpha.1
[0.5.10]: https://github.com/taiki-e/auto_enums/compare/v0.5.9...v0.5.10
[0.5.9]: https://github.com/taiki-e/auto_enums/compare/v0.5.8...v0.5.9
[0.5.8]: https://github.com/taiki-e/auto_enums/compare/v0.5.7...v0.5.8
[0.5.7]: https://github.com/taiki-e/auto_enums/compare/v0.5.6...v0.5.7
[0.5.6]: https://github.com/taiki-e/auto_enums/compare/v0.5.5...v0.5.6
[0.5.5]: https://github.com/taiki-e/auto_enums/compare/v0.5.4...v0.5.5
[0.5.4]: https://github.com/taiki-e/auto_enums/compare/v0.5.3...v0.5.4
[0.5.3]: https://github.com/taiki-e/auto_enums/compare/v0.5.2...v0.5.3
[0.5.2]: https://github.com/taiki-e/auto_enums/compare/v0.5.1...v0.5.2
[0.5.1]: https://github.com/taiki-e/auto_enums/compare/v0.5.0...v0.5.1
[0.5.0]: https://github.com/taiki-e/auto_enums/compare/v0.4.1...v0.5.0
[0.4.1]: https://github.com/taiki-e/auto_enums/compare/v0.4.0...v0.4.1
[0.4.0]: https://github.com/taiki-e/auto_enums/compare/v0.3.8...v0.4.0
[0.3.8]: https://github.com/taiki-e/auto_enums/compare/v0.3.7...v0.3.8
[0.3.7]: https://github.com/taiki-e/auto_enums/compare/v0.3.6...v0.3.7
[0.3.6]: https://github.com/taiki-e/auto_enums/compare/v0.3.5...v0.3.6
[0.3.5]: https://github.com/taiki-e/auto_enums/compare/v0.3.4...v0.3.5
[0.3.4]: https://github.com/taiki-e/auto_enums/compare/v0.3.3...v0.3.4
[0.3.3]: https://github.com/taiki-e/auto_enums/compare/v0.3.2...v0.3.3
[0.3.2]: https://github.com/taiki-e/auto_enums/compare/v0.3.1...v0.3.2
[0.3.1]: https://github.com/taiki-e/auto_enums/compare/v0.3.0...v0.3.1
[0.3.0]: https://github.com/taiki-e/auto_enums/compare/v0.2.1...v0.3.0
[0.2.1]: https://github.com/taiki-e/auto_enums/compare/v0.2.0...v0.2.1
[0.2.0]: https://github.com/taiki-e/auto_enums/compare/v0.1.3...v0.2.0
[0.1.3]: https://github.com/taiki-e/auto_enums/compare/v0.1.2...v0.1.3
[0.1.2]: https://github.com/taiki-e/auto_enums/releases/tag/v0.1.2