Struct predicates::iter::InPredicate
source · Expand description
Predicate that returns true
if variable
is a member of the pre-defined
set, otherwise returns false
.
Note that this implementation places the fewest restrictions on the
underlying Item
type at the expense of having the least performant
implementation (linear search). If the type to be searched is Hash + Eq
,
it is much more efficient to use HashableInPredicate
and
in_hash
. The implementation-specific predicates will be
deprecated when Rust supports trait specialization.
Implementations
sourceimpl<T> InPredicate<T>where
T: Ord + Debug,
impl<T> InPredicate<T>where
T: Ord + Debug,
sourcepub fn sort(self) -> OrdInPredicate<T>
pub fn sort(self) -> OrdInPredicate<T>
Creates a new predicate that will return true
when the given variable
is
contained with the set of items provided.
Note that this implementation requires Item
to be Ord
. 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.
Examples
use predicates::prelude::*;
let predicate_fn = predicate::in_iter(vec![1, 3, 5]).sort();
assert_eq!(true, predicate_fn.eval(&1));
assert_eq!(false, predicate_fn.eval(&2));
assert_eq!(true, predicate_fn.eval(&3));
let predicate_fn = predicate::in_iter(vec!["a", "c", "e"]).sort();
assert_eq!(true, predicate_fn.eval("a"));
assert_eq!(false, predicate_fn.eval("b"));
assert_eq!(true, predicate_fn.eval("c"));
Trait Implementations
sourceimpl<T: Clone> Clone for InPredicate<T>where
T: PartialEq + Debug,
impl<T: Clone> Clone for InPredicate<T>where
T: PartialEq + Debug,
sourcefn clone(&self) -> InPredicate<T>
fn clone(&self) -> InPredicate<T>
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresourceimpl<T> Display for InPredicate<T>where
T: PartialEq + Debug,
impl<T> Display for InPredicate<T>where
T: PartialEq + Debug,
sourceimpl<T: PartialEq> PartialEq<InPredicate<T>> for InPredicate<T>where
T: PartialEq + Debug,
impl<T: PartialEq> PartialEq<InPredicate<T>> for InPredicate<T>where
T: PartialEq + Debug,
sourcefn eq(&self, other: &InPredicate<T>) -> bool
fn eq(&self, other: &InPredicate<T>) -> bool
sourceimpl<T> Predicate<T> for InPredicate<T>where
T: PartialEq + Debug,
impl<T> Predicate<T> for InPredicate<T>where
T: PartialEq + Debug,
sourceimpl<T> PredicateReflection for InPredicate<T>where
T: PartialEq + Debug,
impl<T> PredicateReflection for InPredicate<T>where
T: PartialEq + Debug,
impl<T: Eq> Eq for InPredicate<T>where
T: PartialEq + Debug,
impl<T> StructuralEq for InPredicate<T>where
T: PartialEq + Debug,
impl<T> StructuralPartialEq for InPredicate<T>where
T: PartialEq + Debug,
Auto Trait Implementations
impl<T> RefUnwindSafe for InPredicate<T>where
T: RefUnwindSafe,
impl<T> Send for InPredicate<T>where
T: Send,
impl<T> Sync for InPredicate<T>where
T: Sync,
impl<T> Unpin for InPredicate<T>where
T: Unpin,
impl<T> UnwindSafe for InPredicate<T>where
T: UnwindSafe,
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
sourceimpl<P, Item> PredicateBooleanExt<Item> for Pwhere
P: Predicate<Item>,
Item: ?Sized,
impl<P, Item> PredicateBooleanExt<Item> for Pwhere
P: Predicate<Item>,
Item: ?Sized,
sourcefn and<B>(self, other: B) -> AndPredicate<Self, B, Item>where
B: Predicate<Item>,
Self: Sized,
fn and<B>(self, other: B) -> AndPredicate<Self, B, Item>where
B: Predicate<Item>,
Self: Sized,
Predicate
results, returning the result. Read moresourcefn or<B>(self, other: B) -> OrPredicate<Self, B, Item>where
B: Predicate<Item>,
Self: Sized,
fn or<B>(self, other: B) -> OrPredicate<Self, B, Item>where
B: Predicate<Item>,
Self: Sized,
Predicate
results, returning the result. Read moresourcefn not(self) -> NotPredicate<Self, Item>where
Self: Sized,
fn not(self) -> NotPredicate<Self, Item>where
Self: Sized,
Predicate
, returning the result. Read more