Struct mutatis::mutators::Proj

pub struct Proj<M, F> { /* private fields */ }

A mutator combinator for projecting a value to a sub-value and applying a mutator to that sub-value.

See the proj method on the Mutate trait to construct this type, for examples, for more information.

Trait Implementations

impl<M, F, T, U> Mutate<T> for Proj<M, F>

where M: Mutate<U>, F: FnMut(&mut T) -> &mut U,

fn mutate(&mut self, c: &mut Candidates<'_>, value: &mut T) -> Result<()>

Pseudo-randomly mutate the given value.

fn or<M>(self, other: M) -> Or<Self, M>

where Self: Sized,

Create a new mutator that performs either this mutation or the other mutation.

fn map<F>(self, f: F) -> Map<Self, F>

where Self: Sized, F: FnMut(&mut Context, &mut T) -> Result<()>,

Map a function over the mutations produced by this mutator.

fn proj<F, U>(self, f: F) -> Proj<Self, F>

where Self: Sized, F: FnMut(&mut U) -> &mut T,

Given a projection function F: FnMut(&mut U) -> &mut T, turn this Mutate<T> into a Mutate<U>.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Borrows a mutator, rather than consuming it.