rust-bigint 1.2.0

Common traits and methods for multiple BigInt implementations
Documentation 
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//! Serialize a vector of BigInts. These functions can be used by serde

use crate::BigInt;
#[cfg(feature = "num_bigint")]
use num_traits::Num;
use serde::de::SeqAccess;
use serde::ser::SerializeSeq;
use serde::{de, ser};
use std::fmt;

pub fn serialize<S: ser::Serializer>(x: &[BigInt], serializer: S) -> Result<S::Ok, S::Error> {
    let mut seq = serializer.serialize_seq(Some(x.len()))?;
    for e in x {
        seq.serialize_element(&e.to_str_radix(16))?;
    }
    seq.end()
}

pub fn deserialize<'de, D: de::Deserializer<'de>>(
    deserializer: D,
) -> Result<Vec<BigInt>, D::Error> {
    struct VecBigIntVisitor;

    impl<'de> de::Visitor<'de> for VecBigIntVisitor {
        type Value = Vec<BigInt>;

        fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
            formatter.write_str("vector of bigint")
        }

        fn visit_seq<A>(self, mut seq: A) -> Result<Vec<BigInt>, A::Error>
        where
            A: SeqAccess<'de>,
        {
            let mut values: Vec<BigInt> = Vec::new();
            while let Some(value) = seq.next_element::<String>()? {
                values.push(BigInt::from_str_radix(&value, 16).unwrap());
            }

            Ok(values)
        }
    }

    deserializer.deserialize_seq(VecBigIntVisitor)
}