Struct Config 

pub struct Config<T>(pub T)
where
    T: Clone;

A typed configuration wrapper loaded from environment variables.

Config<T> reads environment variables and deserializes them into a strongly-typed struct. Variable names are matched by converting struct field names to SCREAMING_SNAKE_CASE.

Tuple Fields

0: T

Implementations

impl<T> Config<T>

where T: DeserializeOwned + Clone,

pub fn from_env() -> Result<Config<T>, ConfigError>

Loads configuration from environment variables.

Field names are matched against environment variable names case-insensitively (database_url ↔ DATABASE_URL). Non-string fields (u16, bool, …) are parsed via the envy crate’s per-field deserializers, so a typed port: u16 reads PORT=8080 natively without relying on JSON number coercion (which the previous serde_json-roundtrip implementation got wrong).

pub fn from_env_prefixed(prefix: &str) -> Result<Config<T>, ConfigError>

Loads configuration from environment variables that share a common prefix.

Useful when several configs coexist in the process — set MYAPP_DATABASE_URL, MYAPP_PORT, … and call Config::from_env_prefixed("MYAPP_").

pub fn new(config: T) -> Config<T>

Creates a Config from an existing value.

pub fn inner(&self) -> &T

Returns a reference to the inner config value.

pub fn into_inner(self) -> T

Consumes the wrapper and returns the inner value.

Trait Implementations

impl<T> Clone for Config<T>

where T: Clone,

fn clone(&self) -> Config<T>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for Config<T>

where T: Debug + Clone,

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.