Added a package-owned command for refreshing the complete locked Rust dependency snapshot. Its portable archive writer omits macOS metadata that can otherwise produce warnings when Windows extracts the vendored crates.
Windows source builds now ignore R startup profiles while selecting the
Rust target, so profile output cannot become part of Cargo's --target
argument.
The parser now accepts and ignores reserved directives such as %*** and
treats indented --- text as part of a multiline plain scalar.
parse_yaml() and read_yaml() now preserve tags in the
tag:yaml.org,2002: namespace that are not converted to built-in R values as
a yaml_tag attribute.
parse_yaml() now invokes mapping-key handlers once per key.
write_yaml() no longer adds optional document end (...) markers. Written
documents still begin with --- and end with a newline.
format_yaml() and write_yaml() now emit Inf, -Inf, and NaN as
.Inf, -.Inf, and .NaN so they round-trip as doubles (#9).
write_yaml() gains an append argument for adding YAML documents to
existing files (#4).
Replaced the Rust-side R API layer with savvy/savvy-ffi bindings.
Source installs now require rustc 1.71 or newer. Vendored Rust crate
attribution now points to crate repository metadata when Cargo does not
provide crate authors.
format_yaml() and write_yaml() now emit whole-valued doubles with a
decimal suffix (for example, 100.0 instead of 100), so parsing the result
preserves their R double type.
format_yaml() and write_yaml() now automatically wrap long single-line
strings and multiline strings containing unindented, single-line paragraphs
separated by exactly one blank line. Strings with a safe word boundary are
emitted as folded block scalars: >- preserves no final newline, while >
preserves exactly one. Paragraph breaks and all other string content
round-trip through parse_yaml() unchanged. The new width argument
controls the target line width; width = NULL and width = Inf disable
folded wrapping, mapping keys never use block scalars, and unsafe values use
a lossless fallback. Mapping keys longer than YAML's implicit-key limit use
explicit mapping syntax.
Multiline literal blocks now use explicit indentation indicators to preserve leading spaces or tabs. They keep physical blank lines empty and preserve later-indented lines. Root literal content is indented so document markers inside a string cannot end the scalar.
format_yaml() and write_yaml() now quote strings only when YAML 1.2
requires it. Strings such as "yes", "don't", "a,b", "f[0]", or
".gitignore" are emitted as plain scalars (YAML 1.2 has no legacy
yes/no/on/off booleans, and indicator characters only need quoting
in positions where they are ambiguous). Strings the YAML 1.2 core schema
would read back as null, boolean, or a number (e.g. "true", "0x1F",
"0o17", ".inf") are still quoted, as are structurally unsafe ones
(leading indicators, ": ", " #", leading/trailing white space, or
document-marker prefixes).
read_yaml() and write_yaml() now expand tilde prefixes (~) in path,
as by path.expand() (#7).
Fixed source installs on Windows ARM64 by selecting the
aarch64-pc-windows-gnullvm Rust target. Windows source installs now also
fail early with instructions if the required Rust target is not installed.
The README documents that Windows ARM64 source installs also require
Microsoft C++ Build Tools with ARM64 components.
Added a benchmarks article comparing read/write performance against the
yaml package (#2).