rhai/examples/arrays_and_structs.rs

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//! An example showing how to register a Rust type and use it with arrays.
#[cfg(any(feature = "no_index", feature = "no_object"))]
fn main() {
panic!("This example does not run under 'no_index' or 'no_object'.")
}
use rhai::{Engine, EvalAltResult};
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#[cfg(not(feature = "no_index"))]
#[cfg(not(feature = "no_object"))]
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fn main() -> Result<(), Box<EvalAltResult>> {
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#[derive(Debug, Clone)]
struct TestStruct {
x: i64,
}
impl TestStruct {
pub fn new() -> Self {
Self { x: 1 }
}
pub fn update(&mut self) {
self.x += 1000;
}
}
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let mut engine = Engine::new();
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engine
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.register_type_with_name::<TestStruct>("TestStruct")
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.register_fn("new_ts", TestStruct::new)
.register_fn("update", TestStruct::update);
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#[cfg(feature = "metadata")]
{
println!("Functions registered:");
engine
.gen_fn_signatures(false)
.into_iter()
.for_each(|func| println!("{}", func));
println!();
}
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let result = engine.eval::<TestStruct>(
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"
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let x = new_ts();
x.update();
x
",
)?;
println!("{:?}", result);
let result = engine.eval::<TestStruct>(
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"
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let x = [ new_ts() ];
x[0].update();
x[0]
",
)?;
println!("{:?}", result);
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Ok(())
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}