downcast

library0.11.0rscratesunverified

Trait for downcasting trait objects back to their original types, enabling runtime type checking.

# Cargo.toml
[dependencies]
downcast = "0.11.0"

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INSTALL

IMPORT

SIG · DOWNCAST

downcast

utilityrustv0.11.0

harness data pending

Install & Compatibility

Where this runs

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Code

Verified usage

Verified import paths — ran on the pinned version, not inferred.

Downcast

✓ use downcast::Downcast;

Downcasts a trait object to a concrete type.

use downcast::Downcast; trait MyTrait: Downcast {} impl_downcast!(MyTrait); struct MyStruct; impl MyTrait for MyStruct {} fn main() { let obj: Box<dyn MyTrait> = Box::new(MyStruct); if let Some(concrete) = obj.downcast_ref::<MyStruct>() { println!("Downcast succeeded"); } }

Debug

Known issues

No known issues recorded.

Upgrade

Version history

0.11.0latest on crates.io

Audit

Dependencies

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Agent activity

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Resources

githubhttps://github.com/fkoep/downcast-rs ↗

homepagehttps://github.com/fkoep/downcast-rs ↗

docshttps://docs.rs/downcast/ ↗