fregate 0.17.1

Framework for services creation
Documentation 
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use sealed::sealed;
use serde::de::Error;
use serde::Deserialize;
use serde_json::Value;

// TODO: FIXME: https://github.com/serde-rs/serde/issues/2261
/// Needed for overcoming overlapping path in config deserialization.
#[sealed]
pub trait DeserializeExt {
    /// find value by given pointer and try to deserialize
    fn pointer_and_deserialize<'de, T, E>(&'de self, pointer: &'static str) -> Result<T, E>
    where
        T: Deserialize<'de>,
        E: Error;
}

#[sealed]
impl DeserializeExt for Value {
    fn pointer_and_deserialize<'de, T, E>(&'de self, pointer: &'static str) -> Result<T, E>
    where
        T: Deserialize<'de>,
        E: Error,
    {
        let raw_ret = self
            .pointer(pointer)
            .ok_or_else(|| E::missing_field(pointer))?;

        T::deserialize(raw_ret).map_err(E::custom)
    }
}