einstellung_derive 0.1.0

Proc-Macro crate for einstellung
Documentation 
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---
source: einstellung_derive/src/test.rs
expression: formatted
---
/// --- input ---
#[derive(Config)]
struct Config {
    #[config(default = ||Vec::with_capacity(10))]
    x: Vec<u32>,
}

/// --- output ---
#[derive(::core::default::Default, ::einstellung::serde::Deserialize)]
#[serde(crate = "::einstellung::serde")]
struct ConfigPartial {
    x: Option<Vec<u32>>,
}
impl ::einstellung::PartialConfig for ConfigPartial {
    type Complete = Config;
    fn merge(
        self,
        next: Self,
    ) -> ::core::result::Result<Self, ::einstellung::ConfigError> {
        ::core::result::Result::Ok(Self { x: next.x.or(self.x) })
    }
    fn build(
        self,
    ) -> ::core::result::Result<Self::Complete, ::einstellung::ConfigError> {
        let x = self.x.unwrap_or_else(|| Vec::with_capacity(10));
        ::core::result::Result::Ok(Config { x })
    }
}
impl ::einstellung::Config for Config {
    type Partial = ConfigPartial;
}