# Changelog ## v0.14.3 (February 3, 2023) - Re-export `syn` from `darling` to avoid requiring that consuming crates have a `syn` dependency. - Change ` as FromMeta>` impl to more precisely capture the _value_ span, as opposed to the span of the entire item. - Add `darling::util::{AsShape, Shape, ShapeSet}` to improve "shape" validation for structs and variants. [#222](https://github.com/TedDriggs/issues/222) ## v0.14.2 (October 26, 2022) - Derived impls of `FromMeta` will now error on literals, rather than silently ignoring them. [#193](https://github.com/TedDriggs/darling/pull/193) - Don't include property paths in compile errors when spans are available. [#203](https://github.com/TedDriggs/darling/pull/203) ## v0.14.1 (April 28, 2022) - Fix a bug where using a trait that accepts `#[darling(attributes(...))]` without specifying any attributes would emit code that did not compile. [#183](https://github.com/TedDriggs/darling/issues/183) - Impl `Clone` for `darling::Error` [#184](https://github.com/TedDriggs/darling/pull/184) - Impl `From for syn::Error` [#184](https://github.com/TedDriggs/darling/pull/184) - Add `Error::span` and `Error::explicit_span` methods [#184](https://github.com/TedDriggs/darling/pull/184) ## v0.14.0 (April 13, 2022) - **BREAKING CHANGE:** Remove many trait impls from `util::Flag`. This type had a number of deref and operator impls that made it usable as sort-of-a-boolean. Real-world usage showed this type is more useful if it's able to carry a span for good errors, and that most of those impls were unnecessary. [#179](https://github.com/TedDriggs/darling/pull/179) - Remove need for `#[darling(default)]` on `Option` and `Flag` fields [#161](https://github.com/TedDriggs/darling/issues/161) - Improve validation of enum shapes [#178](https://github.com/TedDriggs/darling/pull/178) - Bump `proc-macro2` dependency to 1.0.37 [#180](https://github.com/TedDriggs/darling/pull/180) - Bump `quote` dependency to 1.0.18 [#180](https://github.com/TedDriggs/darling/pull/180) - Bump `syn` dependency to 1.0.91 [#180](https://github.com/TedDriggs/darling/pull/180) ## v0.13.4 (April 6, 2022) - Impl `FromMeta` for `syn::Visibility` [#173](https://github.com/TedDriggs/darling/pull/173) ## v0.13.3 (April 5, 2022) - Add `error::Accumulator` for dealing with multiple errors [#164](https://github.com/TedDriggs/darling/pull/164) - Impl `FromMeta` for `syn::Type` and its variants [#172](https://github.com/TedDriggs/darling/pulls/172) ## v0.13.2 (March 30, 2022) - Impl `FromMeta` for `syn::ExprPath` [#169](https://github.com/TedDriggs/darling/issues/169) ## v0.13.1 (December 7, 2021) - Add `FromAttributes` trait and macro [#151](https://github.com/TedDriggs/darling/issues/151) ## v0.13.0 (May 20, 2021) - Update darling to 2018 edition [#129](https://github.com/TedDriggs/darling/pull/129) - Error on duplicate fields in `#[darling(...)]` attributes [#130](https://github.com/TedDriggs/darling/pull/130) - Impl `Copy` for `SpannedValue` - Add `SpannedValue::map_ref` ## v0.13.0-beta (April 20, 2021) - Update darling to 2018 edition [#129](https://github.com/TedDriggs/darling/pull/129) - Error on duplicate fields in `#[darling(...)]` attributes [#130](https://github.com/TedDriggs/darling/pull/130) ## v0.12.4 (April 20, 2021) - Add `and_then` to derive macros for `darling` ## v0.12.3 (April 8, 2021) - Fix `FromMeta` impl for `char` not to panic [#126](https://github.com/TedDriggs/darling/pull/126) ## v0.12.2 (February 23, 2021) - Impl `FromMeta` for `HashMap` and `HashMap` ## v0.12.1 (February 22, 2021) - Impl `FromMeta` for `syn::ExprArray` [#122](https://github.com/TedDriggs/darling/pull/122) - Remove use of `unreachable` from `darling::ast::Data` [#123](https://github.com/TedDriggs/darling/pull/123) - Add `darling::ast::Data::try_empty_from` to avoid panics when trying to read a union body [#123](https://github.com/TedDriggs/darling/pull/123) ## v0.12.0 (January 5, 2021) - POSSIBLY BREAKING: Derived impls of `FromDeriveInput`, `FromField`, `FromVariant`, and `FromTypeParam` will now error when encountering an attribute `darling` has been asked to parse that isn't a supported shape. Any crates using `darling` that relied on those attributes being silently ignored could see new errors reported in their dependent crates. [#113](https://github.com/TedDriggs/darling/pull/113) - Impl `syn::spanned::Spanned` for `darling::util::SpannedValue` [#113](https://github.com/TedDriggs/darling/pull/113) - Add `darling::util::parse_attribute_to_meta_list` to provide useful errors during attribute parsing [#113](https://github.com/TedDriggs/darling/pull/113) - Add `impl From for Error` to losslessly propagate `syn` errors [#116](https://github.com/TedDriggs/darling/pull/116) ## v0.11.0 (December 14, 2020) - Bump minor version due to unexpected breaking change [#107](https://github.com/TedDriggs/darling/issues/107) ## v0.10.3 (December 10, 2020) - Add `discriminant` magic field when deriving `FromVariant` [#105](https://github.com/TedDriggs/darling/pull/105) ## v0.10.2 (October 30, 2019) - Bump syn dependency to 1.0.1 [#83](https://github.com/TedDriggs/darling/pull/83) ## v0.10.1 (September 25, 2019) - Fix test compilation errors [#81](https://github.com/TedDriggs/darling/pull/81) ## v0.10.0 (August 15, 2019) - Bump syn and quote to 1.0 [#79](https://github.com/TedDriggs/darling/pull/79) - Increase rust version to 1.31 ## v0.9.0 (March 20, 2019) - Enable "did you mean" suggestions by default - Make `darling_core::{codegen, options}` private [#58](https://github.com/TedDriggs/darling/issues/58) - Fix `Override::as_mut`: [#66](https://github.com/TedDriggs/darling/issues/66) ## v0.8.6 (March 18, 2019) - Added "did you mean" suggestions for unknown fields behind the `suggestions` flag [#60](https://github.com/TedDriggs/issues/60) - Added `Error::unknown_field_with_alts` to support the suggestion use-case. - Added `ast::Fields::len` and `ast::Fields::is_empty` methods. ## v0.8.5 (February 4, 2019) - Accept unquoted positive numeric literals [#52](https://github.com/TedDriggs/issues/52) - Add `FromMeta` to the `syn::Lit` enum and its variants - Improve error message for unexpected literal formats to not say "other" ## v0.8.4 (February 4, 2019) - Use `syn::Error` to provide precise errors before `proc_macro::Diagnostic` is available - Add `diagnostics` feature flag to toggle between stable and unstable error backends - Attach error information in more contexts - Add `allow_unknown_fields` to support parsing the same attribute multiple times for different macros [#51](https://github.com/darling/issues/51) - Proc-macro authors will now see better errors in `darling` attributes ## v0.8.3 (January 21, 2019) - Attach spans to errors in generated trait impls [#37](https://github.com/darling/issues/37) - Attach spans to errors for types with provided bespoke implementations - Deprecate `set_span` from 0.8.2, as spans should never be broadened after being initially set ## v0.8.2 (January 17, 2019) - Add spans to errors to make quality warnings and errors easy in darling. This is blocked on diagnostics stabilizing. - Add `darling::util::SpannedValue` so proc-macro authors can remember position information alongside parsed values. ## v0.8.0 - Update dependency on `syn` to 0.15 [#44](https://github.com/darling/pull/44). Thanks to @hcpl ## v0.7.0 (July 24, 2018) - Update dependencies on `syn` and `proc-macro2` - Add `util::IdentString`, which acts as an Ident or its string equivalent ## v0.6.3 (May 22, 2018) - Add support for `Uses*` traits in where predicates ## v0.6.2 (May 22, 2018) - Add `usage` module for tracking type param and lifetime usage in generic declarations - Add `UsesTypeParams` and `CollectsTypeParams` traits [#37](https://github.com/darling/issues/37) - Add `UsesLifetimes` and `CollectLifetimes` traits [#41](https://github.com/darling/pull/41) - Don't add `FromMeta` bounds to type parameters only used by skipped fields [#40](https://github.com/darling/pull/40) ## v0.6.1 (May 17, 2018) - Fix an issue where the `syn` update broke shape validation [#36](https://github.com/TedDriggs/darling/issues/36) ## v0.6.0 (May 15, 2018) ### Breaking Changes - Renamed `FromMetaItem` to `FromMeta`, and renamed `from_meta_item` method to `from_meta` - Added dedicated `derive(FromMetaItem)` which panics and redirects users to `FromMeta` ## v0.5.0 (May 10, 2018) - Add `ast::Generics` and `ast::GenericParam` to work with generics in a manner similar to `ast::Data` - Add `ast::GenericParamExt` to support alternate representations of generic parameters - Add `util::WithOriginal` to get a parsed representation and syn's own struct for a syntax block - Add `FromGenerics` and `FromGenericParam` traits (without derive support) - Change generated code for `generics` magic field to invoke `FromGenerics` trait during parsing - Add `FromTypeParam` trait [#30](https://github.com/TedDriggs/darling/pull/30). Thanks to @upsuper ## v0.4.0 (April 5, 2018) - Update dependencies on `proc-macro`, `quote`, and `syn` [#26](https://github.com/TedDriggs/darling/pull/26). Thanks to @hcpl ## v0.3.3 (April 2, 2018) **YANKED** ## v0.3.2 (March 13, 2018) - Derive `Default` on `darling::Ignored` (fixes [#25](https://github.com/TedDriggs/darling/issues/25)). ## v0.3.1 (March 7, 2018) - Support proc-macro2/nightly [#24](https://github.com/TedDriggs/darling/pull/24). Thanks to @kdy1 ## v0.3.0 (January 26, 2018) ### Breaking Changes - Update `syn` to 0.12 [#20](https://github.com/TedDriggs/darling/pull/20). Thanks to @Eijebong - Update `quote` to 0.4 [#20](https://github.com/TedDriggs/darling/pull/20). Thanks to @Eijebong - Rename magic field `body` in derived `FromDeriveInput` structs to `data` to stay in sync with `syn` - Rename magic field `data` in derived `FromVariant` structs to `fields` to stay in sync with `syn` ## v0.2.2 (December 5, 2017) - Update `lazy_static` to 1.0 [#15](https://github.com/TedDriggs/darling/pull/16). Thanks to @Eijebong ## v0.2.1 (November 28, 2017) - Add `impl FromMetaItem` for integer types [#15](https://github.com/TedDriggs/darling/pull/15) ## v0.2.0 (June 18, 2017) - Added support for returning multiple errors from parsing [#5](https://github.com/TedDriggs/darling/pull/5) - Derived impls no longer return on first error [#5](https://github.com/TedDriggs/darling/pull/5) - Removed default types for `V` and `F` from `ast::Body` - Enum variants are automatically converted to snake_case [#12](https://github.com/TedDriggs/darling/pull/12)