CHANGELOG.md

Changelog

[Unreleased]

Added

• ALTLIST support allowing users to represent structs as R list objects
• [either] TryFrom<&Robj> for Either<T, R> and From<Either<T, R>> for Robj if T and R are themselves implement these traits. This unblocks scenarios like accepting any numeric vector from R via Either<Integers, Doubles> without extra memory allocation [#480]
• PartialOrd trait implementation for Rfloat, Rint and Rbool. Rfloat and Rint gained min() and max() methods [#573]
• use_rng option for the extendr attribute macro, which enables the use of random number sampling methods from R, e.g. #[extendr(use_rng = true) [#476]
• [T; N] conversions to Robj [#594]

Fixed

• You can now create ArrayView1 from &Robj as well as Robj [#501]
• Raw literals from Rust can be used for function and argument names. e.g. fn r#type() in Rust is converted to type() in R. [#531]
• Fix memory leaks on errors and panics [#555]
• Fixed error when collecting too many objects into List, etc. [#540]

0.4.0

Added

• Support for setting the default value of arguments to struct methods, using #[default = "..."] [#436]
• [ndarray] TryFrom<&Robj> for ArrayView1<T> and ArrayView2<T>, where T is i32, f64, c64, Rint, Rfloat, Rcplx, Rstr, Rbool [#443]
• Debug trait implementation for Rcplx and Complexes [#444]
• TryFrom<Robj>, From<Option<T>>, Into<Option<T>> and their variations for Nullable<T> [#446]
• Nullable<T>::map() that acts on not null value and propagates NULL [#446]
• [ndarray] Conversion from owned arrays (ie ndarray::Array) into Robj [#450]
• [ndarray][docs] Documentation for the robj_ndarray module [#450]
• Sum for scalars like Rint, Rfloat and Rcplx, which accept Iterator<Item = &Rtype> [#454]
• A new collect_rarray method that can be used to collect arbitrary iterables into an R matrix [#466]
• [docs] Documentation for RArray::new_matrix() [#466]

Changed

• [docs] Use bindgen on docs.rs, to ensure newer R features will still be documented [#426]
• Unify the tagging mechanism used to identify Rust types inside ExternalPtr. This allows #[extendr]-annotated functions to directly accept ExternalPtr<MyStruct> as well as MyStruct [#433]
• Nullable<T> is now part of extendr_api::prelude [#446]
• Bump the Rust edition from 2018 to 2021 [#458]
• When converted to STRSXP, strings are now correctly marked as UTF-8 even on non-UTF-8 platforms (i.e., R < 4.2 on Windows), which shouldn't matter for most of the users [#467]

Fixed

• The R CMD check note "Found non-API calls to R" by moving use extendr_engine; inside test! macro [#424]
• The clippy lint "this public function might dereference a raw pointer but is not marked unsafe" [#451]
• A bug where importing a submodule via use some_module; inside the extendr_module! macro wasn't working [#469]

0.3.0

Added

• Function type that wraps an R function, which can be invoked using the call() method. [#188]

• pairlist! macro for generating Pairlist objects, e.g. for use in function calls. [#202]

• use_try_from option for the extendr macro, which allows the use of any type that implements TryInto<Robj>/TryFrom<Robj>, e.g. #[extendr(use_try_from = true)]. [#222]

• Support for R version 4.2. [#235]

• call! macro, which can be used to call an R function whose name is provided as a string. [#238]

• Large Rust integer types (u32, u64 and i64) can now be converted to R's numeric type, which can handle large integer values. [#242]

• TryFrom<Robj> for a large number of Rust types. [#249], [#258]

• Support for ALTREP. [#250], [#274]

• S4 struct, which wraps an S4 class in R. [#268]

• [ndarray] Implemented TryFrom<&ArrayBase> for Robj, allowing extendr-annotated functions to return Arrays from the ndarray crate and have them automatically converted to R arrays. [#275]

• Rint, Rdouble, Rbool and Rcplx: NA-aware wrappers for scalar elements of R vectors [#274], [#284], [#301], [#338], [#350]

• Integers, Doubles, Strings, Logicals and Complexes: wrappers for R vectors that deref to slices of the above types (RInt etc). [#274], [#284], [#301], [#338], [#350]

• ExternalPtr, a wrapper class for creating R objects containing any Rust object. [#260]

• [graphics] Support for R graphics and graphics devices. The graphics feature flag is disabled by default. [#279], [#360], [#373], [#379], [#380], [#389]

• Deref implementation for vector types (Rint/Rfloat/Rbool/Rstr/Robj) to appropriately typed Rust slices. [#327]

• default option for extendr-annotated functions, allowing them to have default values, e.g. fn fred(#[default="NULL"] x: Option<i32>) { }. [#334]

• r_name option for extendr-annotated functions, allowing the generated R function to have a different name. e.g.

  #[extendr(
      use_try_from = true,
      r_name = "test.rename.rlike",
      mod_name = "test_rename_mymod"
  )]
  fn test_rename() { }

  [#335]

• serde::Serialize implementation for R types. [#305], [#355]

• Rany type and the as_any conversion method. [#320]

• std::fmt::Debug implementation for wrapper types. [#345]

• #[derive(TryFromRobj) and #[derive(IntoRobj)] which provide an automatic conversion from and to any custom Rust struct and Robj [#347]

• [[ operator that works with Rust classes. Its behavior is identical to that of the $ operator. [#359]

• Load and Save, traits that, once implemented, provide the ability to load and save R data in the RDS format. These traits are implemented for all Robj. [#363]

• Dataframe wrapper struct. [#393]

• IntoDataFrame trait, which can be derived to allow arbitrary Rust structs to be converted to rows of a data frame. [#393]

Changed

• Strings::elt now returns an Rstr. [#345]

• Renamed RType to Rtype. [#345]

• Wrapper types now contain Robj fields. [#190]

• The R! macro now accepts strings that contain R code. This is now the recommended way of using the macro, especially with raw strings e.g.

  R!(r#"
      print("hello")
  "#);

  [#203]

• Improved error handling for <&str>::try_from(Robj). [#226]

• SymPair::sym_pair() now returns (Option<Robj>, Robj). [#225]

• More detailed error messages when converting Rust integer types to R. [#243]

• Character is now called Rstr. [#273]

• [ndarray] Bumped ndarray to 0.15.3. Under RFC 1977 this is a "public dependency" change, and therefore can be considered a breaking change, as consumers of extendr that use an older version of ndarray will no longer be compatible until they also bump ndarray to a compatible version. [#275]

• IsNA trait has been renamed to CanBeNA. [#288]

• list! has been rewritten, and now returns a List struct. [#303]

Deprecated

• Calling the R! macro with non-string types (e.g. R!(1)) is now deprecated. [#203]

Removed

• Real, Int, Bool and the redundant trait SliceIter, which should be replaced with Rdouble, Rint, and Rbool respectively. [#304], [#338]
• TryFrom conversions between Robj and HashMap for consistency. List::into_hashmap() and List::from_hashmap() should be used instead. [#254]

extendr 0.2.0

• Added contributing guidelines and code of conduct.

• Made use of ndarray optional.

• Made #[extendr] calls panic and thread safe.

• Added NA handling to the #[extendr] macro.

• Added a separate extendr-engine crate that is needed when calling R from Rust.

• Wrapper classes for pairlists, environment, raw, symbols and others.

• More iterator support.

• Operators index, slice, dollar, double_colon, +, -, * and /`.

• Debug printing support expanded to use wrappers.

• Conversion of Robj to wrapper types.

• Multithreaded support - allows multithreaded testing using a recursive spinlock.

• Bool type extended and implemented using TRUE, FALSE and NA_BOOLEAN.

• Optional parameters to support NA handing.

• Errors thrown if input parameters without Option are NA.

• Harmonising of function names into integer, real, logical, symbol, raw, list, pairlist and env.

• Refactored robj code into several source files.

• Many functions updated to use generic types.

• R! macro for executing R source code.

• call! macro to call R code.

• sym! macro to generate symbols.

• Simplification of vector generation using collect_robj and ToVectorValue.

• Added array types [1, 2, 3] as Robj::from targets.

• Macros now mostly return errors.

extendr 0.1.10

• Fix build on Windows and MacOS.