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promises: Abstractions for Promise-Based Asynchronous Programming

Provides fundamental abstractions for doing asynchronous programming in R using promises. Asynchronous programming is useful for allowing a single R process to orchestrate multiple tasks in the background while also attending to something else. Semantics are similar to 'JavaScript' promises, but with a syntax that is idiomatic R.

Version:	1.5.0
Depends:	R (≥ 4.1.0)
Imports:	fastmap (≥ 1.1.0),later,lifecycle,magrittr (≥ 1.5),otel (≥ 0.2.0),R6,rlang
Suggests:	future (≥ 1.21.0),knitr,mirai,otelsdk (≥ 0.2.0),purrr,Rcpp,rmarkdown,spelling,testthat (≥ 3.0.0),vembedr
Published:	2025-11-01
DOI:	10.32614/CRAN.package.promises
Author:	Joe Cheng [aut], Barret Schloerke [aut, cre], Winston Chang [aut], Charlie Gao [aut], Posit Software, PBC [cph, fnd]
Maintainer:	Barret Schloerke <barret at posit.co>
BugReports:	https://github.com/rstudio/promises/issues
License:	MIT + fileLICENSE
URL:	https://rstudio.github.io/promises/,https://github.com/rstudio/promises
NeedsCompilation:	no
Language:	en-US
Materials:	README,NEWS
CRAN checks:	promises results

Documentation:

Reference manual:	promises.html ,promises.pdf
Vignettes:	Why use promises? (source) An informal introduction to async programming (source) Working with promises in R (source) Launching tasks with mirai (source,R code) Launching tasks with future (source,R code) Advanced future and promises usage (source,R code) Using promises with Shiny (source,R code) Combining promises (source) Case study: converting a Shiny app to async (source)

Downloads:

Package source:	promises_1.5.0.tar.gz
Windows binaries:	r-devel:promises_1.5.0.zip, r-release:promises_1.5.0.zip, r-oldrel:promises_1.5.0.zip
macOS binaries:	r-release (arm64):promises_1.5.0.tgz, r-oldrel (arm64):promises_1.5.0.tgz, r-release (x86_64):promises_1.5.0.tgz, r-oldrel (x86_64):promises_1.5.0.tgz
Old sources:	promises archive

Reverse dependencies:

Reverse imports:	Certara.RsNLME.ModelExecutor,chromote,crew,DT,ellmer,FastRet,fiery,gwavr,httpuv,jobqueue,lavaangui,learnr,mcptools,netShiny,PacketLLM,plotly,plumber,plumber2,plumbertableau,Prostar,ravepipeline,reqres,routr,shiny,shinychat,shinydashboard,shinyTree,tall,tapLock,TKCat,TreeSearch,webdeveloper,webshot2
Reverse suggests:	aifeducation,ambiorix,chatLLM,condformat,coro,dipsaus,googlePubsubR,GSVA,httr2,ipc,MVN,notionapi,pagedown,shinyOAuth,telegram.bot
Reverse enhances:	mirai,nanonext

Linking:

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