NewYour coding agent can read the release notes before it upgrades.Set up the MCP server →
crates.io · #16 most downloaded on crates.io
A macro to ergonomically define an item depending on a large number of #[cfg] parameters. Structured like an if-else chain, the first matching branch is the item that gets emitted.
Last release 22 days ago
16 Sep 2026
Ships unpredictably
gaps range from 2 months to 4.7 years
Some releases are documented
notes for 4 of 16 stable releases
1 version withdrawn
withdrawn after publishing
11 years old
17 releases · first in 2015
Add a note that this crate is deprecated, suggesting cfg_select! instead
cfg_select! insteadSupport cfg(true) and cfg(false)
cfg(true) and cfg(false) (#99)One column per quarter.
Revert "Remove @__identity rule."
@__identity rule."Remove @__identity rule.
@__identity rule.Remove compiler-builtins from rustc-dep-of-std dependencies
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Nothing published for this version
Your coding agent can read these notes before it upgrades. Set up the MCP server →