use std::convert::TryInto;
use std::sync::Arc;
use ergotree_ir::chain::ergo_box::ErgoBox;
use ergotree_ir::mir::constant::TryExtractInto;
use ergotree_ir::mir::extract_reg_as::ExtractRegisterAs;
use ergotree_ir::mir::value::Value;
use crate::eval::env::Env;
use crate::eval::EvalContext;
use crate::eval::EvalError;
use crate::eval::Evaluable;
impl Evaluable for ExtractRegisterAs {
fn eval(&self, env: &Env, ctx: &mut EvalContext) -> Result<Value, EvalError> {
let ir_box = self
.input
.eval(env, ctx)?
.try_extract_into::<Arc<ErgoBox>>()?;
Ok(Value::Opt(Box::new(
ir_box
.get_register(self.register_id.try_into().map_err(|e| {
EvalError::RegisterIdOutOfBounds(format!(
"register index is out of bounds: {:?} ",
e
))
})?)
.map(|c| Value::from(c.v)),
)))
}
}
#[allow(clippy::unwrap_used)]
#[cfg(test)]
mod tests {
use super::*;
use crate::eval::context::Context;
use crate::eval::tests::eval_out;
use ergotree_ir::mir::expr::Expr;
use ergotree_ir::mir::global_vars::GlobalVars;
use ergotree_ir::mir::option_get::OptionGet;
use ergotree_ir::mir::unary_op::OneArgOpTryBuild;
use ergotree_ir::types::stype::SType;
use sigma_test_util::force_any_val;
use std::rc::Rc;
#[test]
fn eval_box_get_reg_r0() {
let get_reg_expr: Expr = ExtractRegisterAs::new(
GlobalVars::SelfBox.into(),
0,
SType::SOption(SType::SLong.into()),
)
.unwrap()
.into();
let option_get_expr: Expr = OptionGet::try_build(get_reg_expr).unwrap().into();
let ctx = Rc::new(force_any_val::<Context>());
let v = eval_out::<i64>(&option_get_expr, ctx.clone());
assert_eq!(v, ctx.self_box.value.as_i64());
}
}