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 AppConfig {
    app_name: String,
    #[config(subconfig)]
    database: DatabaseConfig,
    #[config(subconfig)]
    redis: RedisConfig,
}

/// --- output ---
#[derive(::core::default::Default, ::einstellung::serde::Deserialize)]
#[serde(crate = "::einstellung::serde")]
struct AppConfigPartial {
    app_name: Option<String>,
    database: Option<<DatabaseConfig as ::einstellung::Config>::Partial>,
    redis: Option<<RedisConfig as ::einstellung::Config>::Partial>,
}
impl ::einstellung::PartialConfig for AppConfigPartial {
    type Complete = AppConfig;
    fn merge(
        self,
        next: Self,
    ) -> ::core::result::Result<Self, ::einstellung::ConfigError> {
        ::core::result::Result::Ok(Self {
            app_name: next.app_name.or(self.app_name),
            database: match (self.database, next.database) {
                (Some(a), Some(b)) => Some(::einstellung::PartialConfig::merge(a, b)?),
                (a, b) => a.or(b),
            },
            redis: match (self.redis, next.redis) {
                (Some(a), Some(b)) => Some(::einstellung::PartialConfig::merge(a, b)?),
                (a, b) => a.or(b),
            },
        })
    }
    fn build(
        self,
    ) -> ::core::result::Result<Self::Complete, ::einstellung::ConfigError> {
        let app_name = self
            .app_name
            .ok_or(
                ::einstellung::ConfigError::MissingField(
                    ::einstellung::FieldPath::new("AppConfig", "app_name"),
                ),
            )?;
        let database = ::einstellung::build_with_context(
            self.database.unwrap_or_default(),
            "AppConfig",
            "database",
        )?;
        let redis = ::einstellung::build_with_context(
            self.redis.unwrap_or_default(),
            "AppConfig",
            "redis",
        )?;
        ::core::result::Result::Ok(AppConfig {
            app_name,
            database,
            redis,
        })
    }
}
impl ::einstellung::Config for AppConfig {
    type Partial = AppConfigPartial;
}

// ---------------------------------

/// --- input ---
#[derive(Config)]
struct DatabaseConfig {
    url: String,
    pool_size: u32,
}

/// --- output ---
#[derive(::core::default::Default, ::einstellung::serde::Deserialize)]
#[serde(crate = "::einstellung::serde")]
struct DatabaseConfigPartial {
    url: Option<String>,
    pool_size: Option<u32>,
}
impl ::einstellung::PartialConfig for DatabaseConfigPartial {
    type Complete = DatabaseConfig;
    fn merge(
        self,
        next: Self,
    ) -> ::core::result::Result<Self, ::einstellung::ConfigError> {
        ::core::result::Result::Ok(Self {
            url: next.url.or(self.url),
            pool_size: next.pool_size.or(self.pool_size),
        })
    }
    fn build(
        self,
    ) -> ::core::result::Result<Self::Complete, ::einstellung::ConfigError> {
        let url = self
            .url
            .ok_or(
                ::einstellung::ConfigError::MissingField(
                    ::einstellung::FieldPath::new("DatabaseConfig", "url"),
                ),
            )?;
        let pool_size = self
            .pool_size
            .ok_or(
                ::einstellung::ConfigError::MissingField(
                    ::einstellung::FieldPath::new("DatabaseConfig", "pool_size"),
                ),
            )?;
        ::core::result::Result::Ok(DatabaseConfig { url, pool_size })
    }
}
impl ::einstellung::Config for DatabaseConfig {
    type Partial = DatabaseConfigPartial;
}

// ---------------------------------

/// --- input ---
#[derive(Config)]
struct RedisConfig {
    cluster_mode: bool,
}

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