Enum MergeStrategy 

pub enum MergeStrategy {
    OverrideLast,
    Accumulate,
    Custom,
}

How a Dispatcher<V, C, O> combines successive overrides as it folds over a list of variants.

The default OverrideLast mirrors Nix attrset // (later wins). AccumulateList mirrors ++ (concatenate). Custom strategies are handled by the consumer’s O type implementing Default + std::ops::Add (or whatever shape fits).

Variants

OverrideLast

Last variant’s override replaces overlapping keys. Default.

Accumulate

Accumulate overrides additively — typically used when O is a Vec<T> and each helper returns one element to append.

Custom

Caller-supplied custom merge — the consumer’s O type is responsible for implementing the semantics (e.g. via a Monoid impl).

Trait Implementations

impl Clone for MergeStrategy

fn clone(&self) -> MergeStrategy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MergeStrategy

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

Formats the value using the given formatter.

impl Default for MergeStrategy

fn default() -> MergeStrategy

Returns the “default value” for a type.

impl PartialEq for MergeStrategy

fn eq(&self, other: &MergeStrategy) -> 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 MergeStrategy

impl Eq for MergeStrategy

impl StructuralPartialEq for MergeStrategy