Trait PredicateExt 

pub trait PredicateExt: Sized + Predicate {
    // Provided methods
    fn and<R>(self, right: R) -> And<Self, R>
       where R: Predicate<Subject = Self::Subject> { ... }
    fn or<R>(self, right: R) -> Or<Self, R>
       where R: Predicate<Subject = Self::Subject> { ... }
    fn not(self) -> Not<Self> { ... }
    fn boxed(self) -> Box<dyn Predicate<Subject = Self::Subject> + Sync + Send>
       where Self: Send + Sync + 'static { ... }
}

Extension trait for fluent predicate composition.

Provided Methods

fn and<R>(self, right: R) -> And<Self, R>

where R: Predicate<Subject = Self::Subject>,

Combines this predicate with another using AND logic.

Returns Cacheable only if both predicates return Cacheable.

fn or<R>(self, right: R) -> Or<Self, R>

where R: Predicate<Subject = Self::Subject>,

Combines this predicate with another using OR logic.

Returns Cacheable if either predicate returns Cacheable.

fn not(self) -> Not<Self>

Inverts this predicate’s result.

Cacheable becomes NonCacheable and vice versa.

fn boxed(self) -> Box<dyn Predicate<Subject = Self::Subject> + Sync + Send>

where Self: Send + Sync + 'static,

Boxes this predicate into a trait object.

Useful for type erasure when storing predicates in collections or returning them from functions.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<T> PredicateExt for T

where T: Predicate,