Struct Nop 

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

A mutator that doesn’t do anything.

See the nop function to create new Nop mutator instances and for example usage.

Trait Implementations

impl<T: Clone> Clone for Nop<T>

fn clone(&self) -> Nop<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Nop<T>

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

Formats the value using the given formatter.

impl<T: Default> Generate<T> for Nop<T>

fn generate(&mut self, _ctx: &mut Context) -> Result<T>

Generate a random T value from scratch.

impl<T> Mutate<T> for Nop<T>

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

Pseudo-randomly mutate the given value.

fn mutation_count(&self, value: &T, shrink: bool) -> Option<u32>

Return the number of mutations that mutate would register for the given value.

fn generate_via_mutate( &mut self, context: &mut Context, iters: usize, ) -> Result<T>

where T: Sized + Default,

Generate a new value by mutating its default value iters times.

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.