Function filter

Source

pub fn filter<'a, FA, A: 'a + Clone, Brand>(
    f: impl FilterDispatch<'a, Brand, A, FA, <FA as InferableBrand_cdc7cd43dac7585f<'a, Brand, A>>::Marker>,
    fa: FA,
) -> <Brand as Kind_cdc7cd43dac7585f>::Of<'a, A>where
    Brand: Kind_cdc7cd43dac7585f,
    FA: InferableBrand_cdc7cd43dac7585f<'a, Brand, A>,

Expand description

Filters the values in a filterable context using a predicate, inferring the brand from the container type.

The Brand type parameter is inferred from the concrete type of fa via the InferableBrand trait. Both owned and borrowed containers are supported.

For types with multiple brands, use explicit::filter with a turbofish.

§Type Signature

forall Brand A. Filterable Brand => (A -> bool, Brand A) -> Brand A

§Type Parameters

'a: The lifetime of the values.
FA: The container type (owned or borrowed). Brand is inferred from this.
A: The type of the value(s) inside the filterable.
Brand: The brand, inferred via InferableBrand from FA and the element type.

§Parameters

f: The predicate to apply to each value.
fa: The filterable instance (owned or borrowed).

§Returns

A new filterable instance containing only the values satisfying the predicate.

§Examples

use fp_library::functions::*;

let y = filter(|x: i32| x > 3, Some(5));
assert_eq!(y, Some(5));

filter