Trait MapFirstDispatch 

pub trait MapFirstDispatch<'a, Brand: Kind_266801a817966495, A: 'a, B: 'a, C: 'a, FA, Marker> {
    // Required method
    fn dispatch(self, fa: FA) -> <Brand as Kind_266801a817966495>::Of<'a, B, C>;
}

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

The Marker type parameter is inferred from the closure’s argument type: Fn(A) -> B resolves to Val, Fn(&A) -> B resolves to Ref. 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.
• Brand: The brand of the bifunctor.
• A: The type of the first value.
• B: The type of the first result.
• C: The type of the second value.
• FA: The container type (owned or borrowed), inferred from the argument.
• Marker: Dispatch marker type, inferred automatically.

Required Methods

fn dispatch(self, fa: FA) -> <Brand as Kind_266801a817966495>::Of<'a, B, C>

Perform the dispatched map_first operation.

Type Signature

(self, FA) -> Brand B C

Parameters

• self: The closure implementing this dispatch.
• fa: The bifunctor value.

Returns

A new bifunctor with the first value transformed.

Examples

use fp_library::{
	brands::*,
	functions::explicit::*,
};
let result = map_first::<ResultBrand, _, _, _, _, _>(|e| e + 1, Err::<i32, i32>(5));
assert_eq!(result, Err(6));

Implementors

impl<'a, 'b, Brand, A, B, C, F> MapFirstDispatch<'a, Brand, A, B, C, &'b <Brand as Kind_266801a817966495>::Of<'a, A, C>, Ref> for F

where Brand: RefBifunctor, A: 'a, B: 'a, C: Clone + 'a, F: Fn(&A) -> B + 'a,

Routes Fn(&A) -> B closures to RefBifunctor::ref_map_first.

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

Type Parameters

• 'a: The lifetime of the values.
• 'b: The borrow lifetime.
• Brand: The brand of the bifunctor.
• A: The type of the first value.
• B: The type of the first result.
• C: The type of the second value (must be Clone).
• F: The closure type.

impl<'a, Brand, A, B, C, F> MapFirstDispatch<'a, Brand, A, B, C, <Brand as Kind_266801a817966495>::Of<'a, A, C>, Val> for F

where Brand: Bifunctor, A: 'a, B: 'a, C: 'a, F: Fn(A) -> B + 'a,

Routes Fn(A) -> B closures to Bifunctor::map_first.

Type Parameters

• 'a: The lifetime of the values.
• Brand: The brand of the bifunctor.
• A: The type of the first value.
• B: The type of the first result.
• C: The type of the second value.
• F: The closure type.