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Immutables: Fast and Functional Data Structures

Provides fast, side-effect free data structures, including catenable named lists, priority queues, double-ended queues, ordered sequences, and interval indices. Implementation is based on the finger-tree data structure of Hinze and Paterson (2006) <doi:10.1017/S0956796805005769>.

Version: 1.0.1
Depends: R (≥ 4.1.0)
Imports: coro, Rcpp, lambda.r
LinkingTo: Rcpp
Suggests: covr, ggplot2, ggtext, igraph, IRanges, knitr, microbenchmark, pkgdown, pkgload, rmarkdown, rprojroot, rstackdeque, rticles, S4Vectors, scales, testthat (≥ 3.0.0)
Published: 2026-04-28
DOI: 10.32614/CRAN.package.Immutables
Author: Shawn T. O'Neil [aut, cre]
Maintainer: Shawn T. O'Neil <shawn at tislab.org>
BugReports: https://github.com/oneilsh/immutables/issues
License: MIT + file LICENSE
URL: https://oneilsh.github.io/immutables/, https://github.com/oneilsh/immutables
NeedsCompilation: yes
Citation: Immutables citation info
Materials: README, NEWS
CRAN checks: Immutables results

Documentation:

Reference manual: Immutables.html , Immutables.pdf
Vignettes: Benchmarking immutables Collections (source, R code)
Developer API (source, R code)
flexseq (source, R code)
immutables (source, R code)
Interval Indices (source, R code)
Ordered Sequences (source, R code)
Priority Queues (source, R code)

Downloads:

Package source: Immutables_1.0.1.tar.gz
Windows binaries: r-devel: Immutables_1.0.1.zip, r-release: Immutables_1.0.1.zip, r-oldrel: Immutables_1.0.1.zip
macOS binaries: r-release (arm64): Immutables_1.0.1.tgz, r-oldrel (arm64): Immutables_1.0.1.tgz, r-release (x86_64): not available, r-oldrel (x86_64): not available

Linking:

Please use the canonical form https://CRAN.R-project.org/package=Immutables to link to this page.

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
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