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, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

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.

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.