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chore: implement arrayLen in acir_gen #2100

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chore: implement arrayLen in acir_gen #2100

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13 changes: 13 additions & 0 deletions crates/noirc_evaluator/src/ssa_refactor/acir_gen/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -996,6 +996,19 @@ impl Context {

Ok(Self::convert_vars_to_values(out_vars, dfg, result_ids))
}
Intrinsic::ArrayLen => {
let argument = arguments.first().expect("arraylen must have one argument");
let value = self.convert_value(dfg.resolve(*argument), dfg);
let len = match value {
AcirValue::Var(_, _) => unreachable!("ICE - expected an array"),
AcirValue::Array(values) => values.len(),
AcirValue::DynamicArray(array) => array.len,
};
Ok(vec![AcirValue::Var(
self.acir_context.add_constant(FieldElement::from(len as u128)),
AcirType::NumericType(NumericType::NativeField),
)])
}
_ => todo!("expected a black box function"),
}
}
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