franklin_crypto/plonk/circuit/
assignment.rs

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
use crate::bellman::SynthesisError;

pub trait Assignment<T> {
    fn get(&self) -> Result<&T, SynthesisError>;
    fn grab(self) -> Result<T, SynthesisError>;
}

impl<T: Clone> Assignment<T> for Option<T> {
    fn get(&self) -> Result<&T, SynthesisError> {
        match self {
            Some(v) => Ok(v),
            None => Err(SynthesisError::AssignmentMissing),
        }
    }

    fn grab(self) -> Result<T, SynthesisError> {
        match self {
            Some(v) => Ok(v),
            None => Err(SynthesisError::AssignmentMissing),
        }
    }
}