Struct ProfunctorSecondAppliedBrand 

pub struct ProfunctorSecondAppliedBrand<Brand, B>(/* private fields */);

An adapter that partially applies a Profunctor to its second argument, creating a Contravariant functor.

Examples

use fp_library::{
	brands::*,
	classes::contravariant::contramap,
};

let f = |x: i32| x > 5;
let is_long_int = contramap::<ProfunctorSecondAppliedBrand<RcFnBrand, bool>, _, _>(
	|s: String| s.len() as i32,
	std::rc::Rc::new(f) as std::rc::Rc<dyn Fn(i32) -> bool>,
);
assert_eq!(is_long_int("123456".to_string()), true);
assert_eq!(is_long_int("123".to_string()), false);

Trait Implementations

impl<Brand: Clone, B: Clone> Clone for ProfunctorSecondAppliedBrand<Brand, B>

fn clone(&self) -> ProfunctorSecondAppliedBrand<Brand, B>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<Brand: Profunctor, B: 'static> Contravariant for ProfunctorSecondAppliedBrand<Brand, B>

Contravariant instance for ProfunctorSecondAppliedBrand.

Contramaps over the first (contravariant) type parameter of a profunctor via Profunctor::map_input.

Type Parameters

• Brand: The profunctor brand.
• B: The fixed second type parameter.

fn contramap<'a, A: 'a, C: 'a>( f: impl Fn(C) -> A + 'a, fa: <Self as Kind_cdc7cd43dac7585f>::Of<'a, A>, ) -> <Self as Kind_cdc7cd43dac7585f>::Of<'a, C>

Contramap a function over the contravariant type parameter.

Type Signature

forall Brand B A C. Profunctor Brand => (C -> A, ProfunctorSecondApplied Brand B A) -> ProfunctorSecondApplied Brand B C

Type Parameters

• 'a: The lifetime of the values.
• A: The input type.
• C: The output type.

Parameters

• f: The function to apply.
• fa: The profunctor value to contramap over.

Returns

The contramapped profunctor value.

Examples

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

let f = std::rc::Rc::new(|x: i32| x + 1) as std::rc::Rc<dyn Fn(i32) -> i32>;
let g =
	contramap::<ProfunctorSecondAppliedBrand<RcFnBrand, i32>, _, _, _, _>(|x: i32| x * 2, f);
assert_eq!(g(5), 11); // (5 * 2) + 1

impl<Brand: Debug, B: Debug> Debug for ProfunctorSecondAppliedBrand<Brand, B>

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

Formats the value using the given formatter.

impl<Brand: Hash, B: Hash> Hash for ProfunctorSecondAppliedBrand<Brand, B>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<Brand: Profunctor, B: 'static> Kind_cdc7cd43dac7585f for ProfunctorSecondAppliedBrand<Brand, B>

Generated implementation of Kind_cdc7cd43dac7585f for ProfunctorSecondAppliedBrand < Brand, B >.

type Of<'a, A: 'a> = <Brand as Kind_266801a817966495>::Of<'a, A, B>

The applied type.

impl<Brand: Ord, B: Ord> Ord for ProfunctorSecondAppliedBrand<Brand, B>

fn cmp(&self, other: &ProfunctorSecondAppliedBrand<Brand, B>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<Brand: PartialEq, B: PartialEq> PartialEq for ProfunctorSecondAppliedBrand<Brand, B>

fn eq(&self, other: &ProfunctorSecondAppliedBrand<Brand, B>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<Brand: PartialOrd, B: PartialOrd> PartialOrd for ProfunctorSecondAppliedBrand<Brand, B>

fn partial_cmp( &self, other: &ProfunctorSecondAppliedBrand<Brand, B>, ) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<Brand: Copy, B: Copy> Copy for ProfunctorSecondAppliedBrand<Brand, B>

impl<Brand: Eq, B: Eq> Eq for ProfunctorSecondAppliedBrand<Brand, B>

impl<Brand, B> StructuralPartialEq for ProfunctorSecondAppliedBrand<Brand, B>