zero4rs 2.0.0

zero4rs is a powerful, pragmatic, and extremely fast web framework for Rust
Documentation 
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use serde::de::{Deserialize, Deserializer, Visitor};
use serde::{self, Serialize};

#[derive(Clone, Copy, Debug)]
pub struct U64(pub u64);

impl Serialize for U64 {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        serializer.serialize_str(&self.0.to_string())
    }
}

impl<'de> Deserialize<'de> for U64 {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: Deserializer<'de>,
    {
        struct MyVisitor;

        impl Visitor<'_> for MyVisitor {
            type Value = U64;

            fn expecting(&self, fmt: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                fmt.write_str("number or string")
            }

            fn visit_u64<E>(self, val: u64) -> Result<Self::Value, E>
            where
                E: serde::de::Error,
            {
                Ok(U64(val))
            }

            fn visit_str<E>(self, val: &str) -> Result<Self::Value, E>
            where
                E: serde::de::Error,
            {
                match val.parse::<u64>() {
                    Ok(val) => self.visit_u64(val),
                    Err(_) => Err(E::custom("failed to parse u64")),
                }
            }
        }

        deserializer.deserialize_any(MyVisitor)
    }
}