Module optionals 

Optional feature integrations with third-party crates.

This module contains all feature-gated integrations with external crates. Each submodule is only compiled when its corresponding feature is enabled. See the module documentation for a complete list of available features. Optional feature integrations with third-party crates.

This module contains all feature-gated integrations with external crates. Each submodule is only compiled when its corresponding feature is enabled.

Available Features

Feature	Module	Description
rayon	rayon_bridge	Parallel computation with R interop
rand	rand_impl	R’s RNG wrapped for rand crate
rand_distr	-	Re-exports rand_distr distributions
either	either_impl	Either<L, R> conversions
ndarray	ndarray_impl	N-dimensional array conversions
nalgebra	nalgebra_impl	Linear algebra type conversions
num-bigint	num_bigint_impl	Big integer support
rust_decimal	rust_decimal_impl	Decimal number support
ordered-float	ordered_float_impl	Ordered floats for sorting
uuid	uuid_impl	UUID conversions
regex	regex_impl	Compiled regex from R strings
indexmap	indexmap_impl	Order-preserving maps
time	time_impl	Date/time conversions
jiff	jiff_impl	Date/time conversions with IANA tz (parallel to time)
serde	serde_impl	JSON serialization
num-traits	num_traits_impl	Generic numeric operations
bytes	bytes_impl	Byte buffer operations
num-complex	num_complex_impl	Complex number support
url	url_impl	URL parsing and validation
sha2	sha2_impl	Cryptographic hashing
blake3	blake3_impl	BLAKE3 hashing
md5	md5_impl	MD5 hashing (interop only — broken crypto)
globset	globset_impl	Shell-style glob matching
zstd	zstd_impl	zstd compression
bitflags	bitflags_impl	Bitflag conversions
bitvec	bitvec_impl	Bit vector conversions
aho-corasick	aho_corasick_impl	Multi-pattern string search
toml	toml_impl	TOML parsing
tabled	tabled_impl	Table formatting
tinyvec	tinyvec_impl	Small-vector optimized types
borsh	borsh_impl	Binary serialization

Module template

Every integration module follows the same regional layout. Use this as a template when adding a new optional integration:

// region: Scalar conversions          (TryFromSexp + IntoR for T)
// region: Option conversions          (NA support — Option<T>)
// region: Vector conversions          (Vec<T>, Box<[T]>, slice views)
// region: Vec<Option<T>> conversions  (NA-aware vectors)
// region: R<X>Ops adapter trait       (e.g., RUuidOps, RUrlOps —
//                                      convenience methods callable
//                                      from #[miniextendr] code)
// region: Helper functions
// region: Unit tests

Exceptions: rayon_bridge.rs exposes a parallel-iteration API, not a type-conversion adapter, and does not follow this shape. serde_impl.rs is the JSON adapter (the native serde path lives in crate::serde). Array-heavy upstreams (ndarray_impl, arrow_impl, nalgebra_impl, jiff_impl) are larger because their type matrices are larger; the per-region shape still applies.