Trait WitherDispatch 

pub trait WitherDispatch<'a, FnBrand, Brand: Kind_cdc7cd43dac7585f, M: Kind_cdc7cd43dac7585f, A: 'a, B: 'a, FA, Marker> {
    // Required method
    fn dispatch(
        self,
        ta: FA,
    ) -> <M as Kind_cdc7cd43dac7585f>::Of<'a, <Brand as Kind_cdc7cd43dac7585f>::Of<'a, B>>;
}

Trait that routes a wither operation to the appropriate type class method.

The Marker type parameter is an implementation detail resolved by the compiler from the closure’s argument type; callers never specify it directly. The FA type parameter is inferred from the container argument: owned for Val dispatch, borrowed for Ref dispatch.

Type Parameters

• 'a: The lifetime of the values.
• FnBrand: The brand of the cloneable function to use.
• Brand: The brand of the witherable structure.
• M: The applicative functor brand for the computation.
• A: The type of the elements in the input structure.
• B: The type of the elements in the output structure.
• FA: The container type (owned or borrowed), inferred from the argument.
• Marker: Dispatch marker type, inferred automatically. Either Val or Ref.

Required Methods

fn dispatch( self, ta: FA, ) -> <M as Kind_cdc7cd43dac7585f>::Of<'a, <Brand as Kind_cdc7cd43dac7585f>::Of<'a, B>>

Perform the dispatched wither operation.

Type Signature

(self, FA) -> M (Brand B)

Parameters

• self: The closure implementing this dispatch.
• ta: The structure to filter.

Returns

The filtered result in the applicative context.

Examples

use fp_library::{
	brands::*,
	functions::explicit::*,
};

let result = wither::<RcFnBrand, OptionBrand, OptionBrand, _, _, _, _>(
	|a: i32| Some(if a > 2 { Some(a * 2) } else { None }),
	Some(5),
);
assert_eq!(result, Some(Some(10)));

Implementors

impl<'a, 'b, FnBrand, Brand, M, A, B, Func> WitherDispatch<'a, FnBrand, Brand, M, A, B, &'b <Brand as Kind_cdc7cd43dac7585f>::Of<'a, A>, Ref> for Func

where Brand: RefWitherable, FnBrand: LiftFn + 'a, A: 'a + Clone, B: 'a + Clone, M: Applicative, Func: Fn(&A) -> <M as Kind_cdc7cd43dac7585f>::Of<'a, Option<B>> + 'a, <Brand as Kind_cdc7cd43dac7585f>::Of<'a, Option<B>>: Clone, <M as Kind_cdc7cd43dac7585f>::Of<'a, Option<B>>: Clone,

Routes Fn(&A) -> M::Of<Option<B>> closures to RefWitherable::ref_wither.

The container must be passed by reference (&ta).

Type Parameters

• 'a: The lifetime of the values.
• 'b: The borrow lifetime.
• FnBrand: The cloneable function brand.
• Brand: The brand of the witherable structure.
• M: The applicative functor brand.
• A: The type of the elements in the input structure.
• B: The type of the elements in the output structure.
• Func: The closure type.

impl<'a, FnBrand, Brand, M, A, B, Func> WitherDispatch<'a, FnBrand, Brand, M, A, B, <Brand as Kind_cdc7cd43dac7585f>::Of<'a, A>, Val> for Func

where Brand: Witherable, A: 'a + Clone, B: 'a + Clone, M: Applicative, Func: Fn(A) -> <M as Kind_cdc7cd43dac7585f>::Of<'a, Option<B>> + 'a, <Brand as Kind_cdc7cd43dac7585f>::Of<'a, Option<B>>: Clone, <M as Kind_cdc7cd43dac7585f>::Of<'a, Option<B>>: Clone,

Routes Fn(A) -> M::Of<Option<B>> closures to Witherable::wither.

Type Parameters

• 'a: The lifetime of the values.
• FnBrand: The cloneable function brand (unused by Val path).
• Brand: The brand of the witherable structure.
• M: The applicative functor brand.
• A: The type of the elements in the input structure.
• B: The type of the elements in the output structure.
• Func: The closure type.