40 lines
894 B
Rust
40 lines
894 B
Rust
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use rhai::{Engine, EvalAltResult, RegisterFn, Scope};
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use std::cell::Cell;
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use std::rc::Rc;
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#[derive(Debug, Clone)]
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struct CommandWrapper {
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value: Rc<Cell<i64>>,
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}
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impl CommandWrapper {
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pub fn set_value(&mut self, x: i64) {
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let val = self.value.get();
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self.value.set(val + x);
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}
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}
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#[test]
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fn test_side_effects() -> Result<(), EvalAltResult> {
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let mut engine = Engine::new();
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let mut scope = Scope::new();
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let payload = Rc::new(Cell::new(12));
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assert_eq!(payload.get(), 12);
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let command = CommandWrapper {
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value: payload.clone(),
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};
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scope.push_constant("Command", command);
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engine.register_type_with_name::<CommandWrapper>("CommandType");
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engine.register_fn("action", CommandWrapper::set_value);
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engine.eval_with_scope::<()>(&mut scope, "Command.action(30)")?;
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assert_eq!(payload.get(), 42);
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Ok(())
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}
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