A dyanmically typed value with fast downcasting.
Provides a Dynamic
type, which contains a dynamically typed value. Dynamic
is similar to Any
from std::any::Any
, except that downcasting does not involve any virtual calls since the TypeId
of the contained value is pre-computed.
extern crate dynamic;
use dynamic::Dynamic;
fn main() {
// Create a new Dynamic value.
let x = Dynamic::new(100usize);
// If we try to downcast to the wrong type it will not work.
assert_eq!(x.downcast_ref::<i32>(), None);
// If we downcast to the right type, we get access.
assert_eq!(x.downcast_ref::<usize>(), Some(&100usize));
}
Use the crates.io repository; add this to your Cargo.toml
along with the rest of your dependencies:
[dependencies]
dynamic = "0.2"
Jonathan Reem is the primary author and maintainer of dynamic.
MIT
Version | Tag | Published |
---|---|---|
0.2.1 | 6yrs ago | |
0.2.0 | 6yrs ago | |
0.1.0 | 6yrs ago |