Crate features / proc-macro-error2
Feature flags · proc-macro-error2 2.0.1 · from crates.io 2026-10-24
proc-macro-error2 features: what each one does, and the line to copy
Short answerproc-macro-error2 2.0.1 has 2 features. By default it turns on syn-error; add default-features = false to start from nothing. It needs Rust 1.61 or newer.
Pick features
Every feature
| Feature | In default | Turns on |
|---|---|---|
nightly | nothing else (a switch the code checks) | |
syn-error | yes | dep:syn |
dep:x turns on the optional dependency x; x/y turns on feature y of dependency x (with ?, only if x is already on).
MSRV history
The minimum Rust version proc-macro-error2 declares (rust-version), and the release that changed it:
- 2.0.0-pre.1 (2024-09-05): Rust 1.61
Stuck on an older compiler? Pin the last version that supports it, for example cargo update -p proc-macro-error2 --precise <version>, or use resolver 3, which picks compatible versions for you.
More on proc-macro-error2
Real downloads, dependents and alternatives: proc-macro-error2 crate data (492.2K real downloads a day, 103 dependents).
Security record: proc-macro-error2 advisories.
docs.rs feature list · crates.io · license MIT OR Apache-2.0 · edition 2021
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