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Case for fallible cs() method #138

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Case for fallible cs() method #138

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7e1e32b
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skaunov Jan 21, 2024
ed11638
Tiny cleaning of changes
skaunov Jan 21, 2024
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29 changes: 24 additions & 5 deletions src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -131,12 +131,31 @@ pub trait R1CSVar<F: Field> {
impl<F: Field, T: R1CSVar<F>> R1CSVar<F> for [T] {
type Value = Vec<T::Value>;

fn cs(&self) -> ark_relations::r1cs::ConstraintSystemRef<F> {
let mut result = ark_relations::r1cs::ConstraintSystemRef::None;
for var in self {
result = var.cs().or(result);
fn cs(&self) -> Result<ark_relations::r1cs::ConstraintSystemRef<F>, &str> {
if let Some(Ok(result)) = self.iter().map(|x| Ok(x.cs())).reduce(
|x: Result<ark_relations::r1cs::ConstraintSystemRef<F>, _>, y| {
if let Ok(x) = x {
let y = y?;
if x != y {
if x.is_none() {
return Ok(y);
}
if y.is_none() {
return Ok(x);
}
Err("todo!(CSs are not reducible to one)")
} else {
return Ok(x);
}
} else {
x
}
},
) {
Ok(result.to_owned())
} else {
Err("empty input")
}
result
}

fn value(&self) -> Result<Self::Value, ark_relations::r1cs::SynthesisError> {
Expand Down