openalex 0.2.2

A rust module to to access metadata from openalex.org
Documentation 
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use std::{fmt, marker::PhantomData};

use serde::{
    de::{self, Visitor},
    Deserialize, Deserializer,
};

pub mod filter;
pub mod sort;

pub fn deserialize_null_default<'de, D, T>(deserializer: D) -> Result<T, D::Error>
where
    T: Default + Deserialize<'de>,
    D: Deserializer<'de>,
{
    let opt = Option::deserialize(deserializer)?;
    Ok(opt.unwrap_or_default())
}

pub fn deserialize_opt_string_from_uint_null_missing<'de, D>(
    deserializer: D,
) -> Result<Option<String>, D::Error>
where
    D: Deserializer<'de>,
{
    struct Inner(PhantomData<fn() -> Option<String>>);

    impl<'de> Visitor<'de> for Inner {
        type Value = Option<String>;

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

        fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
        where
            E: de::Error,
        {
            Ok(Some(v.to_owned()))
        }

        fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
        where
            E: de::Error,
        {
            Ok(Some(v.to_string()))
        }

        fn visit_u128<E>(self, v: u128) -> Result<Self::Value, E>
        where
            E: de::Error,
        {
            Ok(Some(v.to_string()))
        }

        fn visit_none<E>(self) -> Result<Self::Value, E>
        where
            E: de::Error,
        {
            Ok(None)
        }

        fn visit_unit<E>(self) -> Result<Self::Value, E>
        where
            E: de::Error,
        {
            Ok(None)
        }
    }

    deserializer.deserialize_any(Inner(PhantomData))
}