Struct VecLens 

pub struct VecLens<T> { /* private fields */ }

A lens over a single element within a Vec<T>.

Trait Implementations

impl<T> Lens for VecLens<T>

type Source = Vec<T>

The lens source type, i.e., the object containing the field.

type Target = T

The lens target type, i.e., the field to be accessed or modified.

fn path(&self) -> LensPath

Returns a LensPath that describes the target of this lens relative to its source.

fn set(&self, source: Self::Source, target: Self::Target) -> Self::Source

Sets the target of the lens and returns the new state of the source. (This consumes the source.)

impl<T> RefLens for VecLens<T>

fn get_ref<'a>(&self, source: &'a Vec<T>) -> &'a T

Gets a reference to the target of the lens. (This does not consume the source.)

fn mutate_with_fn( &self, source: &mut Self::Source, f: &dyn Fn(&Self::Target) -> Self::Target, )

Modifies the target of the lens by applying a function to the current value.

fn modify( &self, source: Self::Source, f: &dyn Fn(&Self::Target) -> Self::Target, ) -> Self::Source

Modifies the target of the lens by applying a function to the current value. This consumes the source.