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downcast

v0.11.0 Growing

Trait for downcasting trait objects back to their original types.

MIT Edition 2018

Quick Verdict

  • โœ•Not updated for 4+ years
  • !Pre-1.0: API may have breaking changes
  • โœ“Trusted by 453 crates
  • โœ“Tiny footprint (6KB, 0 deps)
  • โœ“Permissive license (MIT)

Security

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Downloads
98.4M
Dependents
453
Releases
20
Size
6KB

Deep Insights

๐Ÿ“ˆ
Strong growth momentum

7.6M downloads in the last 30 days (252.3K/day), up 33% from the previous period.

๐Ÿ”—
Moderate adoption

453 crates depend on downcast. Reasonable ecosystem adoption, though not yet a core dependency.

๐Ÿ”ฌ
Pre-1.0 for over a year

Despite being 10+ years old, downcast hasn't reached 1.0 yet. Expect potential API changes between versions.

๐Ÿชถ
Zero dependencies

downcast has no external dependencies โ€” minimal supply chain risk and fast compile times.

๐Ÿ“
Compact crate

At 6KB, downcast is lightweight. Small crate size correlates with focused, well-scoped functionality.

๐ŸŒŸ
Used by top crates

Notable dependents include mockall, workflow-log, workflow-terminal, ioc, palkia. When high-quality crates choose downcast, it's a strong quality signal.

Health Breakdown

Maintenance 4/25

Recency, release consistency, active ratio

Quality 18/25

Yanked ratio, deps, size, maturity, features

Community 12/20

Reverse deps, ownership, ecosystem

Popularity 8/15

Downloads, momentum, growth trend

Documentation 12/15

Docs, repo, license, metadata

Download Trend

Daily downloads ยท last 90 days
191K/day avg+68%
0100K200K300K400K12/301/172/42/223/123/29

Top Dependents

Version Adoption

v0.11.0
93%
v0.10.0
7%
v0.9.2
0%
v0.2.3
0%
v0.6.0
0%

Release Timeline

20 releasessince 2015
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2017
5
2018
1
2019
1
2020
2021
1
2022
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2026
Less
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Feature Flags

default =["std"]

std*nightly

README

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Maintainers

Dependencies
0
direct dependencies
Dependents
453
crates depend on downcast

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