Struct ConfigBuilder 

pub struct ConfigBuilder<C>
where
    C: DeserializeOwned + Send + Sync + 'static,
{ /* private fields */ }

Fluent builder for Config. Sources are appended in registration order; later sources win.

Implementations

impl<C> ConfigBuilder<C>

where C: DeserializeOwned + Send + Sync + 'static,

pub fn new() -> Self

Construct an empty builder. Equivalent to Config::builder.

pub fn embedded_default(self, yaml: &'static str) -> Self

Add a YAML string baked into the binary as the lowest-priority layer.

pub fn user_file(self, path: impl Into<PathBuf>) -> Self

Add a YAML file on disk. Missing files are not an error — they contribute no keys. Present but malformed YAML is an error. See ConfigError::Io for the distinction.

pub fn env_prefixed(self, prefix: impl Into<String>) -> Self

Add an environment-variable source with the given prefix.

Prefix translation follows figment’s Env::prefixed — the prefix is stripped and the remainder is lower-cased; underscore is the key separator, so MYTOOL_HTTP_PORT populates http.port on a nested config struct.

pub fn build(self) -> Result<Config<C>, ConfigError>

Finalise construction: parse all layers and wrap the result in a Config.

Trait Implementations

impl<C> Default for ConfigBuilder<C>

where C: DeserializeOwned + Send + Sync + 'static,

fn default() -> Self

Returns the “default value” for a type.