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yaml12: Fast 'YAML' 1.2 Parser and Formatter

A fast, correct, safe, and ergonomic 'YAML' 1.2 parser and generator written in 'Rust'. Convert between 'YAML' and simple 'R' objects with full support for multi-document streams, tags, anchors, and aliases. Offers opt-in handlers for custom tag behavior and round-trips common 'R' data structures. Implements the 'YAML' 1.2.2 specification from the 'YAML' Language Development Team (2021) <https://yaml.org/spec/1.2.2/>. Proudly supported by Posit.

Version: 0.1.0
Depends: R (≥ 4.2)
Suggests: jsonlite, knitr, rmarkdown, testthat (≥ 3.0.0), waldo, withr
Published: 2025-12-11
DOI: 10.32614/CRAN.package.yaml12
Author: Tomasz Kalinowski [aut, cre], Posit Software, PBC ROR ID [cph, fnd], Authors of the dependency Rust crates [cph] (See inst/AUTHORS and LICENSE.note for vendored Rust dependency authors and licenses.)
yaml12 author details
Maintainer: Tomasz Kalinowski <tomasz at posit.co>
BugReports: https://github.com/posit-dev/r-yaml12/issues
License: MIT + file LICENSE
URL: https://posit-dev.github.io/r-yaml12/, https://github.com/posit-dev/r-yaml12
NeedsCompilation: yes
SystemRequirements: Cargo (Rust's package manager), rustc >= 1.70.0, xz
Materials: README, NEWS
CRAN checks: yaml12 results

Documentation:

Reference manual: yaml12.html , yaml12.pdf
Vignettes: YAML in 2 Minutes: A Gentle Introduction for R Users (source, R code)
YAML Tags, Anchors, and Advanced Features with yaml12 (source, R code)

Downloads:

Package source: yaml12_0.1.0.tar.gz
Windows binaries: r-devel: yaml12_0.1.0.zip, r-release: yaml12_0.1.0.zip, r-oldrel: yaml12_0.1.0.zip
macOS binaries: r-release (arm64): yaml12_0.1.0.tgz, r-oldrel (arm64): yaml12_0.1.0.tgz, r-release (x86_64): yaml12_0.1.0.tgz, r-oldrel (x86_64): yaml12_0.1.0.tgz

Linking:

Please use the canonical form https://CRAN.R-project.org/package=yaml12 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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