Crate features / downcast-rs
Feature flags · downcast-rs 2.0.2 · from crates.io 2026-10-24
downcast-rs features: what each one does, and the line to copy
Short answerdowncast-rs 2.0.2 has 2 features. By default it turns on std, sync; add default-features = false to start from nothing. It needs Rust 1.56 or newer.
Pick features
Every feature
| Feature | In default | Turns on |
|---|---|---|
std | yes | nothing else (a switch the code checks) |
sync | yes | nothing else (a switch the code checks) |
dep:x turns on the optional dependency x; x/y turns on feature y of dependency x (with ?, only if x is already on).
MSRV history
The minimum Rust version downcast-rs declares (rust-version), and the release that changed it:
- 2.0.0 (2025-01-07): Rust 1.56
Stuck on an older compiler? Pin the last version that supports it, for example cargo update -p downcast-rs --precise <version>, or use resolver 3, which picks compatible versions for you.
More on downcast-rs
Real downloads, dependents and alternatives: downcast-rs crate data (561.5K real downloads a day, 298 dependents).
docs.rs feature list · crates.io · license MIT OR Apache-2.0 · edition 2021
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