Struct ConfigLayer 

pub struct ConfigLayer { /* private fields */ }

One config file’s settings as written. Partial, so a later file can set a value back to its default and an omitted key changes nothing; AppConfig::from_layers fills defaults once after merging.

Implementations

impl ConfigLayer

pub fn parse(text: &str) -> Result<Self>

A layer from TOML text, type-checked here so a mistake names its file.

pub fn from_overrides(overrides: &[Override]) -> Result<Self>

The layer -c KEY=VALUE makes, the last of one key winning. Keys and shapes were checked on the command line; types are checked here.

pub fn get(&self, key: &str) -> Option<&Value>

The value this layer writes at the dotted key, if it writes one.

pub fn merge(&mut self, upper: ConfigLayer)

Lay upper over this layer: its keys win (except COMBINED_KEYS); keys it omits keep this layer’s values. upper’s imports are not carried over.

Trait Implementations

impl Clone for ConfigLayer

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ConfigLayer

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

Formats the value using the given formatter.

impl Default for ConfigLayer

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for ConfigLayer

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ConfigLayer