Enum Source

pub enum Source {
    File,
    Env,
    Runtime,
    TestOverride,
}

Configuration source layers in priority order.

Resolution order is always: TestOverride -> Runtime -> Env -> File -> Default.

Smaller priority() number = higher precedence.

Variants

File

Values loaded from configuration files (e.g., YAML). This is the lowest-priority explicit source.

Env

Values read from environment variables at process startup. Higher priority than File, but lower than Runtime/TestOverride.

Runtime

Values set programmatically at runtime. Highest stable priority layer; only overridden by TestOverride.

TestOverride

Ephemeral values inserted by tests via ConfigLock::override_key. Always wins over all other sources; removed when the guard drops.

Trait Implementations

impl Clone for Source

fn clone(&self) -> Source

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Source

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

Formats the value using the given formatter.

impl Hash for Source

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Source

fn eq(&self, other: &Source) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Source

impl Eq for Source

impl StructuralPartialEq for Source