proc-macro2
Cargov1.0.107A substitute implementation of the compiler's `proc_macro` API to decouple token-based libraries from the procedural macro use case.
Not recommended for new projects
No — proc-macro2 should not be adopted for new projects. No license declared — you have no explicit right to use this code.
- ?Adoption: grade ?, Not reported by this registry.
No download data reported for this package yet.
- AMaintenance: grade A, Excellent.
Last published 53 days ago. 21 releases in the last 2 years.
- AWeight: grade A, Excellent.
Zero runtime dependencies.
- BSupply chain: grade B, Good.
This package has a single maintainer (bus factor of 1).
- FLicense: grade F, Failing.
No license declared — you have no explicit right to use this code.
Grades are computed deterministically from registry metadata collected by PackageGraph — downloads, dependents, publish dates, the resolved dependency tree, maintainer count, and declared licenses. No third-party scores are used.
Install cost
What you actually take on by adding proc-macro2 to a project.
Runtime packages this one declares itself.
Distinct packages in the full runtime tree, deduplicated the way a package manager would.
Unpacked size of this package plus its entire runtime tree.
Longest resolved dependency chain below this package.
Compatibility
- Rust edition
- No constraint declared
proc-macro2 vs the alternatives
Packages solving a similar problem in the cargo ecosystem, compared on the signals that drive an adoption decision.
Release history
15 releases in the last two years, typically about 9 days apart.
| Version | Published | Size | License |
|---|---|---|---|
| 1.0.107latest | 1 month ago | — | MIT OR Apache-2.0 |
| 1.0.106 | 7 months ago | — | MIT OR Apache-2.0 |
| 1.0.105 | 8 months ago | — | MIT OR Apache-2.0 |
| 1.0.104 | 8 months ago | — | MIT OR Apache-2.0 |
| 1.0.103 | 10 months ago | — | MIT OR Apache-2.0 |
| 1.0.102 | 10 months ago | — | MIT OR Apache-2.0 |
| 1.0.101 | 1 year ago | — | MIT OR Apache-2.0 |
| 1.0.100 | 1 year ago | — | MIT OR Apache-2.0 |
| 1.0.99 | 1 year ago | — | MIT OR Apache-2.0 |
| 1.0.98 | 1 year ago | — | MIT OR Apache-2.0 |
| 1.0.97 | 1 year ago | — | MIT OR Apache-2.0 |
| 1.0.96 | 1 year ago | — | MIT OR Apache-2.0 |
| 1.0.95 | 1 year ago | — | MIT OR Apache-2.0 |
| 1.0.94 | 1 year ago | — | MIT OR Apache-2.0 |
| 1.0.93 | 1 year ago | — | MIT OR Apache-2.0 |
Overview
proc-macro2 is an Cargo package that a substitute implementation of the compiler's `proc_macro` API to decouple token-based libraries from the procedural macro use case. The latest version is 1.0.107.
Who should use it
Teams working in the Cargo ecosystem who need a substitute implementation of the compiler's `proc_macro` API to decouple token-based libraries from the procedural macro use case and value a focused solution.
When not to use it
Consider an alternative if you need to or if a more actively-maintained option better fits your Cargo stack.
Pros
- Zero runtime dependencies — minimal footprint.
Cons
- No license detected — review usage terms before adopting.
Auto-generated from collected registry metadata. No external claims are inferred.
Maintainers
Frequently asked questions
Should I use proc-macro2?
No — proc-macro2 should not be adopted for new projects. No license declared — you have no explicit right to use this code.
How do I install proc-macro2?
Run `cargo add proc-macro2` to add proc-macro2 to your Cargo project.
What license is proc-macro2 released under?
No license was detected in proc-macro2's metadata; review the repository before use.
Is proc-macro2 still maintained?
The most recent release of proc-macro2 (v1.0.107) was published 1 month ago.