Struct SendEndofunction 

pub struct SendEndofunction<'a, FnBrand: SendLiftFn, A: 'a>(pub <FnBrand as SendCloneFn>::Of<'a, A, A>);

A thread-safe wrapper for endofunctions that enables monoidal operations.

SendEndofunction a represents a function a -> a wrapped in an Arc<dyn Fn>.

It exists to provide a monoid instance where:

• The binary operation append is function composition.
• The identity element empty is the identity function.

This is the Send + Sync counterpart of Endofunction.

Type Parameters

• 'a: The lifetime of the function and its captured data.
• FnBrand: The brand of the thread-safe cloneable function wrapper.
• A: The input and output type of the function.

Tuple Fields

0: <FnBrand as SendCloneFn>::Of<'a, A, A>

The wrapped function.

Implementations

impl<'a, FnBrand: SendLiftFn, A: 'a> SendEndofunction<'a, FnBrand, A>

Type Parameters

• 'a: The lifetime of the function and its captured data.
• FnBrand: The brand of the function (e.g., ArcFnBrand).
• A: The input and output type of the function.

pub fn new(f: <FnBrand as SendCloneFn>::Of<'a, A, A>) -> Self

Creates a new SendEndofunction.

Type Signature

forall A. FnBrand A A -> SendEndofunction FnBrand A

Parameters

• f: The function to wrap.

Returns

A new SendEndofunction.

Examples

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

let f =
	SendEndofunction::<ArcFnBrand, _>::new(send_lift_fn_new::<ArcFnBrand, _, _>(|x: i32| {
		x * 2
	}));
assert_eq!(f.0(5), 10);

Trait Implementations

impl<'a, FnBrand: SendLiftFn, A: 'a> Clone for SendEndofunction<'a, FnBrand, A>

Type Parameters

• 'a: The lifetime of the function and its captured data.
• FnBrand: The brand of the function (e.g., ArcFnBrand).
• A: The input and output type of the function.

fn clone(&self) -> Self

Type Signature

forall A. &SendEndofunction FnBrand A -> SendEndofunction FnBrand A

Returns

The cloned endofunction.

Examples

use fp_library::{
	brands::*,
	functions::*,
	types::*,
};
let f =
	SendEndofunction::<ArcFnBrand, _>::new(send_lift_fn_new::<ArcFnBrand, _, _>(|x: i32| {
		x * 2
	}));
let cloned = f.clone();
assert_eq!(cloned.0(5), 10);

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a, FnBrand: SendLiftFn, A: 'a> Debug for SendEndofunction<'a, FnBrand, A>

where <FnBrand as SendCloneFn>::Of<'a, A, A>: Debug,

Type Parameters

• 'a: The lifetime of the function and its captured data.
• FnBrand: The brand of the function (e.g., ArcFnBrand).
• A: The input and output type of the function.

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Type Signature

forall A. (&SendEndofunction FnBrand A, &mut Formatter) -> fmt

Parameters

• &self: The function to format.
• fmt: The formatter to use.

Returns

The result of the formatting operation.

Examples

use fp_library::{
	brands::*,
	functions::*,
	types::*,
};
let f =
	SendEndofunction::<ArcFnBrand, _>::new(send_lift_fn_new::<ArcFnBrand, _, _>(|x: i32| {
		x * 2
	}));
assert_eq!(f.0(5), 10);

impl<'a, FnBrand: 'a + SendLiftFn, A: 'a + Send + Sync> Monoid for SendEndofunction<'a, FnBrand, A>

Type Parameters

• 'a: The lifetime of the function and its captured data.
• FnBrand: The brand of the function (e.g., ArcFnBrand).
• A: The input and output type of the function.

fn empty() -> Self

Returns the identity endofunction.

Type Signature

forall A. () -> SendEndofunction FnBrand A

Returns

The identity endofunction.

Examples

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

let id = empty::<SendEndofunction<ArcFnBrand, i32>>();
assert_eq!(id.0(5), 5);

impl<'a, FnBrand: 'a + SendLiftFn, A: 'a + Send + Sync> Semigroup for SendEndofunction<'a, FnBrand, A>

Type Parameters

• 'a: The lifetime of the function and its captured data.
• FnBrand: The brand of the function (e.g., ArcFnBrand).
• A: The input and output type of the function.

fn append(a: Self, b: Self) -> Self

Composes two endofunctions.

append(f, g) results in f . g (read as “f after g”), meaning g is applied first, then f.

Type Signature

forall A. (SendEndofunction FnBrand A, SendEndofunction FnBrand A) -> SendEndofunction FnBrand A

Parameters

• a: The second function to apply (the outer function).
• b: The first function to apply (the inner function).

Returns

The composed function a . b.

Examples

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

let f =
	SendEndofunction::<ArcFnBrand, _>::new(send_lift_fn_new::<ArcFnBrand, _, _>(|x: i32| {
		x * 2
	}));
let g =
	SendEndofunction::<ArcFnBrand, _>::new(send_lift_fn_new::<ArcFnBrand, _, _>(|x: i32| {
		x + 1
	}));

// f(g(x)) = (x + 1) * 2
let h = append::<_>(f, g);
assert_eq!(h.0(5), 12);