Struct predicates::iter::HashableInPredicate

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

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

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

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

Formats the value using the given formatter.

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.

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

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: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<P, T> Predicate<P> for HashableInPredicate<T>where
    T: Borrow<P> + Hash + Eq + Debug,
    P: Hash + Eq + Debug + ?Sized,

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

Execute this Predicate against variable, returning the resulting boolean.

fn find_case<'a>(&'a self, expected: bool, variable: &P) -> Option<Case<'a>>

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

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

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

Parameters of the current Predicate.

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

Nested Predicates of the current Predicate.

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

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

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