76 lines
1.8 KiB
Rust
76 lines
1.8 KiB
Rust
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//! An example showing how to register a Rust type and methods/getters/setters using the `CustomType` trait.
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#[cfg(feature = "no_object")]
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fn main() {
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panic!("This example does not run under 'no_object'.");
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}
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use rhai::{CustomType, Engine, EvalAltResult, TypeBuilder};
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#[cfg(not(feature = "no_object"))]
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fn main() -> Result<(), Box<EvalAltResult>> {
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#[derive(Debug, Clone)]
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struct TestStruct {
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x: i64,
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}
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impl TestStruct {
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pub fn new() -> Self {
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Self { x: 1 }
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}
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pub fn update(&mut self) {
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self.x += 1000;
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}
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pub fn calculate(&mut self, data: i64) -> i64 {
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self.x * data
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}
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pub fn get_x(&mut self) -> i64 {
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self.x
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}
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pub fn set_x(&mut self, value: i64) {
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self.x = value;
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}
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}
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impl CustomType for TestStruct {
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fn build(mut builder: TypeBuilder<Self>) {
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#[allow(deprecated)] // The TypeBuilder api is volatile.
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builder
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.with_name("TestStruct")
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.with_fn("new_ts", Self::new)
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.with_fn("update", Self::update)
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.with_fn("calc", Self::calculate)
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.with_get_set("x", Self::get_x, Self::set_x);
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}
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}
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let mut engine = Engine::new();
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engine.build_type::<TestStruct>();
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#[cfg(feature = "metadata")]
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{
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println!("Functions registered:");
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engine
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.gen_fn_signatures(false)
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.into_iter()
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.for_each(|func| println!("{}", func));
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println!();
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}
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let result = engine.eval::<i64>(
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"
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let x = new_ts();
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x.x = 42;
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x.update();
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x.calc(x.x)
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",
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)?;
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println!("result: {}", result); // prints 1085764
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Ok(())
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}
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