ergotree_interpreter/eval/
extract_reg_as.rs

1use std::convert::TryInto;
2
3use ergotree_ir::chain::ergo_box::ErgoBox;
4use ergotree_ir::mir::constant::TryExtractInto;
5use ergotree_ir::mir::extract_reg_as::ExtractRegisterAs;
6use ergotree_ir::mir::value::Value;
7use ergotree_ir::reference::Ref;
8
9use crate::eval::env::Env;
10use crate::eval::Context;
11use crate::eval::EvalError;
12use crate::eval::Evaluable;
13
14impl Evaluable for ExtractRegisterAs {
15    fn eval<'ctx>(
16        &self,
17        env: &mut Env<'ctx>,
18        ctx: &Context<'ctx>,
19    ) -> Result<Value<'ctx>, EvalError> {
20        let ir_box = self
21            .input
22            .eval(env, ctx)?
23            .try_extract_into::<Ref<'_, ErgoBox>>()?;
24        let id = self.register_id.try_into().map_err(|e| {
25            EvalError::RegisterIdOutOfBounds(format!(
26                "register index {} is out of bounds: {:?} ",
27                self.register_id, e
28            ))
29        })?;
30        let reg_val_opt = ir_box.get_register(id).map_err(|e| {
31            EvalError::NotFound(format!(
32                "Error getting the register id {id} with error {e:?}"
33            ))
34        })?;
35        Ok(Value::Opt(Box::new(reg_val_opt.map(|c| Value::from(c.v)))))
36    }
37}
38
39#[allow(clippy::unwrap_used)]
40#[cfg(test)]
41mod tests {
42    use super::*;
43    use crate::eval::context::Context;
44    use crate::eval::tests::eval_out;
45    use ergotree_ir::mir::expr::Expr;
46    use ergotree_ir::mir::global_vars::GlobalVars;
47    use ergotree_ir::mir::option_get::OptionGet;
48    use ergotree_ir::mir::unary_op::OneArgOpTryBuild;
49    use ergotree_ir::types::stype::SType;
50    use sigma_test_util::force_any_val;
51
52    #[test]
53    fn eval_box_get_reg_r0() {
54        let get_reg_expr: Expr = ExtractRegisterAs::new(
55            GlobalVars::SelfBox.into(),
56            0,
57            SType::SOption(SType::SLong.into()),
58        )
59        .unwrap()
60        .into();
61        let option_get_expr: Expr = OptionGet::try_build(get_reg_expr).unwrap().into();
62        let ctx = force_any_val::<Context>();
63        let v = eval_out::<i64>(&option_get_expr, &ctx);
64        assert_eq!(v, ctx.self_box.value.as_i64());
65    }
66}
ergotree_interpreter/eval/extract_reg_as.rs

ergotree_interpreter/eval/
extract_reg_as.rs
