Struct GcOpMutator 

pub struct GcOpMutator { /* private fields */ }

A mutator for the GcOp type.

Implementations

impl GcOpMutator

pub fn new() -> Self

Construct a new GcOpMutator instance.

Trait Implementations

impl Default for GcOpMutator

where u32: DefaultMutate,

fn default() -> Self

Returns the “default value” for a type.

impl Generate<GcOp> for GcOpMutator

where u32: DefaultMutate, <u32 as DefaultMutate>::DefaultMutate: Generate<u32>,

fn generate(&mut self, cx: &mut Context) -> Result<GcOp>

Generate a random T value from scratch.

impl Mutate<GcOp> for GcOpMutator

where u32: DefaultMutate, <u32 as DefaultMutate>::DefaultMutate: Generate<u32>,

fn mutate( &mut self, mutations: &mut Candidates<'_>, value: &mut GcOp, ) -> Result<()>

Pseudo-randomly mutate the given value.

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

Return the number of mutations that [mutate][Mutate::mutate] would register for 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<(), Error>,

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.