Enum Category 

#[non_exhaustive]
pub enum Category {
    Default,
    File,
    Env,
    Cli,
    Custom(&'static str),
}

Which kind of source contributed a value.

Surfaced separately from a source’s human-readable name so a UI can render one visual per bucket. Serializes as a lowercase string ("default", "file", "env", "cli", or the Custom label).

use provcfg::Category;

assert_eq!(Category::Env.as_str(), "env");
assert_eq!(Category::Custom("vault").as_str(), "vault");

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Default

Built-in defaults layer.

File

A configuration file (JSON, TOML, …).

Env

Environment variables.

Cli

Command-line arguments.

Custom(&'static str)

A caller-defined source; the string is a free-form label.

Implementations

impl Category

pub fn as_str(&self) -> &'static str

The stable lowercase label, as used by the serde::Serialize impl.

Trait Implementations

impl Clone for Category

fn clone(&self) -> Category

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Category

impl Debug for Category

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

Formats the value using the given formatter.

impl Eq for Category

impl From<Category> for ConfigSource

Map provcfg’s source categories onto kellnr’s API-facing enum. kellnr only loads TOML files, so Category::File becomes Toml; Category::Default plus any future provcfg variants fall to Default via the wildcard arm.

fn from(category: Category) -> Self

Converts to this type from the input type.

impl Hash for Category

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

where __H: Hasher,

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 Category

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Category

fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Category