einstellung_derive 0.1.2

Proc-Macro crate for einstellung
Documentation 
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---
source: einstellung_derive/src/test.rs
expression: formatted
---
/// --- input ---
#[derive(Config)]
struct ServerConfig {
    host: String,
    port: u16,
    is_active: bool,
}

/// --- output ---
#[derive(::core::default::Default, ::einstellung::serde::Deserialize)]
#[serde(crate = "::einstellung::serde")]
struct ServerConfigPartial {
    host: Option<String>,
    port: Option<u16>,
    is_active: Option<bool>,
}
impl ::einstellung::PartialConfig for ServerConfigPartial {
    type Complete = ServerConfig;
    fn merge(
        self,
        next: Self,
    ) -> ::core::result::Result<Self, ::einstellung::ConfigError> {
        ::core::result::Result::Ok(Self {
            host: next.host.or(self.host),
            port: next.port.or(self.port),
            is_active: next.is_active.or(self.is_active),
        })
    }
    fn build(
        self,
    ) -> ::core::result::Result<Self::Complete, ::einstellung::ConfigError> {
        let host = self
            .host
            .ok_or(
                ::einstellung::ConfigError::MissingField(
                    ::einstellung::FieldPath::new("ServerConfig", "host"),
                ),
            )?;
        let port = self
            .port
            .ok_or(
                ::einstellung::ConfigError::MissingField(
                    ::einstellung::FieldPath::new("ServerConfig", "port"),
                ),
            )?;
        let is_active = self
            .is_active
            .ok_or(
                ::einstellung::ConfigError::MissingField(
                    ::einstellung::FieldPath::new("ServerConfig", "is_active"),
                ),
            )?;
        ::core::result::Result::Ok(ServerConfig {
            host,
            port,
            is_active,
        })
    }
}
impl ::einstellung::Config for ServerConfig {
    type Partial = ServerConfigPartial;
}