[−][src]Struct predicates::function::FnPredicate
Predicate that wraps a function over a reference that returns a bool
.
This type is returned by the predicate::function
function.
Methods
impl<F, T> FnPredicate<F, T> where
F: Fn(&T) -> bool,
T: ?Sized,
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F: Fn(&T) -> bool,
T: ?Sized,
pub fn fn_name(self, name: &'static str) -> Self
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Provide a descriptive name for this function.
Examples
use predicates::prelude::*; struct Example { string: String, number: i32, } let string_check = predicate::function(|x: &Example| x.string == "hello") .fn_name("is_hello"); println!("predicate: {}", string_check);
Trait Implementations
impl<F: Copy, T> Copy for FnPredicate<F, T> where
F: Fn(&T) -> bool,
T: Copy + ?Sized,
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F: Fn(&T) -> bool,
T: Copy + ?Sized,
impl<F: PartialEq, T> PartialEq<FnPredicate<F, T>> for FnPredicate<F, T> where
F: Fn(&T) -> bool,
T: PartialEq + ?Sized,
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F: Fn(&T) -> bool,
T: PartialEq + ?Sized,
fn eq(&self, other: &FnPredicate<F, T>) -> bool
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fn ne(&self, other: &FnPredicate<F, T>) -> bool
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impl<F: Eq, T> Eq for FnPredicate<F, T> where
F: Fn(&T) -> bool,
T: Eq + ?Sized,
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F: Fn(&T) -> bool,
T: Eq + ?Sized,
impl<F: Clone, T> Clone for FnPredicate<F, T> where
F: Fn(&T) -> bool,
T: Clone + ?Sized,
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F: Fn(&T) -> bool,
T: Clone + ?Sized,
fn clone(&self) -> FnPredicate<F, T>
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fn clone_from(&mut self, source: &Self)
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Performs copy-assignment from source
. Read more
impl<F: Debug, T> Debug for FnPredicate<F, T> where
F: Fn(&T) -> bool,
T: Debug + ?Sized,
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F: Fn(&T) -> bool,
T: Debug + ?Sized,
impl<F, T> Display for FnPredicate<F, T> where
F: Fn(&T) -> bool,
T: ?Sized,
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F: Fn(&T) -> bool,
T: ?Sized,
impl<F, T> Predicate<T> for FnPredicate<F, T> where
F: Fn(&T) -> bool,
T: ?Sized,
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F: Fn(&T) -> bool,
T: ?Sized,
fn eval(&self, variable: &T) -> bool
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fn find_case<'a>(&'a self, expected: bool, variable: &T) -> Option<Case<'a>>
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impl<F, T> PredicateReflection for FnPredicate<F, T> where
F: Fn(&T) -> bool,
T: ?Sized,
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F: Fn(&T) -> bool,
T: ?Sized,
Auto Trait Implementations
impl<F, T: ?Sized> Send for FnPredicate<F, T> where
F: Send,
T: Send,
F: Send,
T: Send,
impl<F, T: ?Sized> Sync for FnPredicate<F, T> where
F: Sync,
T: Sync,
F: Sync,
T: Sync,
Blanket Implementations
impl<P, Item> PredicateNameExt for P where
Item: ?Sized,
P: Predicate<Item>,
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Item: ?Sized,
P: Predicate<Item>,
fn name(self, name: &'static str) -> NamePredicate<Self, Item> where
Self: Sized,
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Self: Sized,
Name a predicate expression. Read more
impl<P, Item> PredicateBooleanExt for P where
Item: ?Sized,
P: Predicate<Item>,
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Item: ?Sized,
P: Predicate<Item>,
fn and<B>(self, other: B) -> AndPredicate<Self, B, Item> where
B: Predicate<Item>,
Self: Sized,
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B: Predicate<Item>,
Self: Sized,
Compute the logical AND of two Predicate
results, returning the result. Read more
fn or<B>(self, other: B) -> OrPredicate<Self, B, Item> where
B: Predicate<Item>,
Self: Sized,
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B: Predicate<Item>,
Self: Sized,
Compute the logical OR of two Predicate
results, returning the result. Read more
fn not(self) -> NotPredicate<Self, Item> where
Self: Sized,
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Self: Sized,
Compute the logical NOT of a Predicate
, returning the result. Read more
impl<T> ToOwned for T where
T: Clone,
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T: Clone,
type Owned = T
The resulting type after obtaining ownership.
fn to_owned(&self) -> T
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fn clone_into(&self, target: &mut T)
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impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,