Struct predicates::iter::HashableInPredicate

pub struct HashableInPredicate<T> where
    T: Hash + Eq + Debug,  { /* fields omitted */ }

Predicate that returns true if variable is a member of the pre-defined HashSet, otherwise returns false.

Note that this implementation requires Item to be Hash + Eq. The InPredicate uses a less efficient search algorithm but only requires Item implement PartialEq. The implementation-specific predicates will be deprecated when Rust supports trait specialization.

This is created by the predicate::in_hash function.

Trait Implementations

impl<T: Debug> Debug for HashableInPredicate<T> where     T: Hash + Eq + Debug,

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

Formats the value using the given formatter.

impl<T: Clone> Clone for HashableInPredicate<T> where     T: Hash + Eq + Debug,

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

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: PartialEq> PartialEq for HashableInPredicate<T> where     T: Hash + Eq + Debug,

fn eq(&self, other: &HashableInPredicate<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &HashableInPredicate<T>) -> bool

This method tests for !=.

impl<T: Eq> Eq for HashableInPredicate<T> where     T: Hash + Eq + Debug,

impl<T> Predicate<T> for HashableInPredicate<T> where     T: Hash + Eq + Debug,

fn eval(&self, variable: &T) -> bool

Execute this Predicate against variable, returning the resulting boolean.

fn find_case<'a>(&'a self, expected: bool, variable: &T) -> Option<Case<'a>>

Find a case that proves this predicate as expected when run against variable.

impl<'a, T: ?Sized> Predicate<T> for HashableInPredicate<&'a T> where     T: Hash + Eq + Debug,

fn eval(&self, variable: &T) -> bool

Execute this Predicate against variable, returning the resulting boolean.

fn find_case<'b>(&'b self, expected: bool, variable: &T) -> Option<Case<'b>>

Find a case that proves this predicate as expected when run against variable.

impl<T> PredicateReflection for HashableInPredicate<T> where     T: Hash + Eq + Debug,

Important traits for Box<R>

impl<R> Read for Box<R> where
    R: Read + ?Sized, impl<W> Write for Box<W> where
    W: Write + ?Sized, impl<I> Iterator for Box<I> where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

fn parameters<'a>(&'a self) -> Box<Iterator<Item = Parameter<'a>> + 'a>

Parameters of the current Predicate.

Important traits for Box<R>

impl<R> Read for Box<R> where
    R: Read + ?Sized, impl<W> Write for Box<W> where
    W: Write + ?Sized, impl<I> Iterator for Box<I> where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;

fn children(&'a self) -> Box<Iterator<Item = Child<'a>> + 'a>

Nested Predicates of the current Predicate.

impl<T> Display for HashableInPredicate<T> where     T: Hash + Eq + Debug,

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

Formats the value using the given formatter.