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proc-macro-error vs proc-macro-error3 vs proc-macro-error2

Side-by-side comparison of Rust crates

Core Metrics

proc-macro-errorproc-macro-error3proc-macro-error2
Health Score535651
Total Downloads308.2M137.1K121.8M
30d Downloads7.9M121.7K9.6M
Dependents5.7K171.2K
Releases3835
Last Updated2173d ago34d ago675d ago
Age7y1m2y 10m

Health Breakdown

proc-macro-error
Maintenance
6
Quality
16
Community
14
Popularity
8
Documentation
9
proc-macro-error3
Maintenance
12
Quality
18
Community
8
Popularity
6
Documentation
12
proc-macro-error2
Maintenance
4
Quality
14
Community
13
Popularity
8
Documentation
12

Technical Details

proc-macro-errorproc-macro-error3proc-macro-error2
Version1.0.43.0.22.0.1
Stable (≥1.0)✓ Yes✓ Yes✓ Yes
LicenseMIT OR Apache-2.0MIT OR Apache-2.0MIT OR Apache-2.0
Dependencies866
Crate Size25KB36KB25KB
Features243
Yanked %10.5%0.0%40.0%
Edition201820212021
MSRV1.611.61
Owners111

Quick Verdict

  • proc-macro-error3 leads with a health score of 56/100, but none of the options score above 80.
  • proc-macro-error has the most downloads (308.2M), suggesting wider adoption.
  • proc-macro-error is depended on by 5.7K crates — strongest ecosystem trust.
  • ⚠ proc-macro-error, proc-macro-error2 have not been updated in over a year.