Decision Workspace
r4 vs metastruct vs metastruct_macro
Side-by-side comparison of Rust crates
42
r4
growingv1.0.1
A compact macro that generates iterators using for comprehensions and natural Rust syntax.
59
metastruct
growingv0.1.4
Abstractions for iterating and mapping over struct fields
53
metastruct_macro
growingv0.1.4
Abstractions for iterating and mapping over struct fields (proc macro crate)
Core Metrics
| r4 | metastruct | metastruct_macro | |
|---|---|---|---|
| Health Score | 42 | 59 | 53 |
| Total Downloads | 4.0K | 482.0K | 482.7K |
| 30d Downloads | 5 | 21.6K | 21.6K |
| Dependents | 0 | 0 | 5 |
| Releases | 2 | 5 | 5 |
| Last Updated | 2963d ago | 72d ago | 72d ago |
| Age | 8y 1m | 3y 3m | 3y 3m |
Health Breakdown
r4
Maintenance
3
Quality
21
Community
3
Popularity
4
Documentation
11
metastruct
Maintenance
15
Quality
17
Community
10
Popularity
7
Documentation
10
metastruct_macro
Maintenance
15
Quality
14
Community
7
Popularity
7
Documentation
10
Technical Details
| r4 | metastruct | metastruct_macro | |
|---|---|---|---|
| Version | 1.0.1 | 0.1.4 | 0.1.4 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✗ No |
| License | Apache-2.0 | Apache-2.0 | Apache-2.0 |
| Dependencies | 0 | 1 | 6 |
| Crate Size | 9KB | 3KB | 7KB |
| Features | 0 | 2 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | — | 2021 | 2021 |
| MSRV | — | — | — |
| Owners | 1 | 2 (team) | 1 |
Links
Quick Verdict
- •metastruct leads with a health score of 59/100, but none of the options score above 80.
- •metastruct_macro has the most downloads (482.7K), suggesting wider adoption.
- •⚠ r4 has not been updated in over a year.
- •metastruct, metastruct_macro are pre-1.0 — API may change.