use crate::serialization::op_code::OpCode;
use crate::serialization::sigma_byte_reader::SigmaByteRead;
use crate::serialization::sigma_byte_writer::SigmaByteWrite;
use crate::serialization::SigmaParsingError;
use crate::serialization::SigmaSerializable;
use crate::serialization::SigmaSerializeResult;
use crate::types::stype::SType;
use super::expr::Expr;
use super::expr::InvalidArgumentError;
use crate::has_opcode::HasStaticOpCode;
#[derive(PartialEq, Eq, Debug, Clone)]
pub struct ExtractRegisterAs {
pub input: Box<Expr>,
pub register_id: i8,
pub elem_tpe: SType,
}
impl ExtractRegisterAs {
pub fn new(input: Expr, register_id: i8, tpe: SType) -> Result<Self, InvalidArgumentError> {
if input.post_eval_tpe() != SType::SBox {
return Err(InvalidArgumentError(format!(
"expected input to be SBox, got {0:?}",
input
)));
}
let elem_tpe = match tpe {
SType::SOption(t) => Ok(*t),
_ => Err(InvalidArgumentError(format!(
"expected tpe to be SOption, got {0:?}",
tpe
))),
}?;
Ok(ExtractRegisterAs {
input: input.into(),
register_id,
elem_tpe,
})
}
pub fn tpe(&self) -> SType {
SType::SOption(self.elem_tpe.clone().into())
}
}
impl HasStaticOpCode for ExtractRegisterAs {
const OP_CODE: OpCode = OpCode::EXTRACT_REGISTER_AS;
}
impl SigmaSerializable for ExtractRegisterAs {
fn sigma_serialize<W: SigmaByteWrite>(&self, w: &mut W) -> SigmaSerializeResult {
self.input.sigma_serialize(w)?;
w.put_i8(self.register_id)?;
self.elem_tpe.sigma_serialize(w)
}
fn sigma_parse<R: SigmaByteRead>(r: &mut R) -> Result<Self, SigmaParsingError> {
let input = Expr::sigma_parse(r)?;
let register_id = r.get_i8()?;
let elem_tpe = SType::sigma_parse(r)?;
Ok(ExtractRegisterAs::new(
input,
register_id,
SType::SOption(elem_tpe.into()),
)?)
}
}
#[cfg(test)]
#[cfg(feature = "arbitrary")]
#[allow(clippy::unwrap_used)]
mod tests {
use super::*;
use crate::mir::global_vars::GlobalVars;
use crate::serialization::sigma_serialize_roundtrip;
#[test]
fn ser_roundtrip() {
let e: Expr = ExtractRegisterAs::new(
GlobalVars::SelfBox.into(),
0,
SType::SOption(SType::SLong.into()),
)
.unwrap()
.into();
assert_eq![sigma_serialize_roundtrip(&e), e];
}
}