Decision Workspace
type_constructor vs former_types vs former
Side-by-side comparison of Rust crates
52
type_constructor
growingv0.3.0
Fundamental data types and type constructors, like Single, Pair, Many.
68
former_types
stablev2.35.0
A flexible implementation of the Builder pattern supporting nested builders and collection-specific subformers. Its compile-time structures and traits that are not generated but reused.
67
former
stablev2.42.0
A flexible implementation of the Builder pattern supporting nested builders and collection-specific subformers. Simplify the construction of complex objects.
Core Metrics
| type_constructor | former_types | former | |
|---|---|---|---|
| Health Score | 52 | 68 | 67 |
| Total Downloads | 140.3K | 45.3K | 207.3K |
| 30d Downloads | 975 | 1.1K | 1.8K |
| Dependents | 28 | 134 | 222 |
| Releases | 19 | 35 | 70 |
| Last Updated | 741d ago | 61d ago | 61d ago |
| Age | 3y 10m | 1y 10m | 4y 4m |
Health Breakdown
type_constructor
Maintenance
6
Quality
18
Community
9
Popularity
6
Documentation
13
former_types
Maintenance
15
Quality
22
Community
12
Popularity
6
Documentation
13
former
Maintenance
15
Quality
21
Community
12
Popularity
6
Documentation
13
Technical Details
| type_constructor | former_types | former | |
|---|---|---|---|
| Version | 0.3.0 | 2.35.0 | 2.42.0 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | MIT | MIT | MIT |
| Dependencies | 2 | 3 | 6 |
| Crate Size | 38KB | 39KB | 291KB |
| Features | 8 | 6 | 10 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2021 |
| MSRV | — | — | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •former_types leads with a health score of 68/100, but none of the options score above 80.
- •former has the most downloads (207.3K), suggesting wider adoption.
- •former is depended on by 222 crates — strongest ecosystem trust.
- •⚠ type_constructor has not been updated in over a year.
- •type_constructor is pre-1.0 — API may change.