wasm-msgpack 0.6.2

MessagePack serialization implementation for Rust optimized for WebAssembly environments
Documentation 
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use std::{fmt, fmt::Display, str::FromStr};

use serde::{
    de::{self, Deserialize, Deserializer, Unexpected},
    ser::{Serialize, Serializer},
};

#[derive(Clone, Copy, Ord, PartialOrd, Eq, PartialEq, Debug)]
pub struct PrimStr<T>(T)
where T: Copy + PartialOrd + Display + FromStr;

impl<T> Serialize for PrimStr<T>
where T: Copy + PartialOrd + Display + FromStr
{
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where S: Serializer {
        serializer.collect_str(&self.0)
    }
}

impl<'de, T> Deserialize<'de> for PrimStr<T>
where T: Copy + PartialOrd + Display + FromStr
{
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where D: Deserializer<'de> {
        use std::marker::PhantomData;
        struct Visitor<T>(PhantomData<T>);

        impl<'de, T> de::Visitor<'de> for Visitor<T>
        where T: Copy + PartialOrd + Display + FromStr
        {
            type Value = PrimStr<T>;

            fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { formatter.write_str("number represented as string") }

            fn visit_str<E>(self, value: &str) -> Result<PrimStr<T>, E>
            where E: de::Error {
                match T::from_str(value) {
                    Ok(id) => Ok(PrimStr(id)),
                    Err(_) => Err(E::invalid_value(Unexpected::Str(value), &self)),
                }
            }
        }

        deserializer.deserialize_str(Visitor(PhantomData))
    }
}