FunctorKit

A prelude for programming with functors. Still under major construction.

Importing

Importing requires a little care.

In package platforms, to support concurrency and async / await:

    platforms: [
        .iOS(.v13),
        .macOS(.v10_15)
    ],

Note that the repository is Swift-FunctorKit, but the package / library are just FunctorKit.

In package dependencies:

dependencies: [
    .package(url: "https://github.com/apotheca/Swift-FunctorKit", from: "0.1.0")
],

In target dependencies:

dependencies: [
    .product(name: "FunctorKit", package: "Swift-FunctorKit"),
]),

Contents

Anything with a checkmark ☑ is mostly stable, though it may experience nomenclature changes.

Anything missing a checkmark ☐ is unstable, and its implementation is unfinished or subject to change.

Features

  • ☑ Operators
  • ☐ Clean code
  • ☐ Nomenclature
  • ☐ Implementations
  • ☐ Documentation
  • ☐ Example
  • ☐ Unit tests

Functor and recursive protocols

  • ☑ Monoid
  • ☑ Functor
  • ☑ Foldable
  • ☑ Bifunctor
  • ☐ Bifoldable
  • ☑ Profunctor
  • ☑ Recursive and BaseFunctor
  • ☐ RecursiveFunctor and BaseBifunctor
  • ☐ Indexed, Itered, Pathed
  • ☐ Recursion Schemes
  • ☐ Annotation Schemes
  • ☐ AsyncFunctor

Functor types

  • ☐ Both
  • ☐ Either
  • ☐ Func
  • ☐ Identity
  • ☐ Pair

Recursive number types

  • ☐ Nat
  • ☐ Bin

Recursive functor types

  • ☐ BinTree
  • ☐ List
  • ☐ Tree
  • ☐ Map

Recursion / annotation schemes

  • ☐ And
  • ☐ Or
  • ☐ Xor
  • ☐ Onto
  • ☐ Unto

Gotchas

Many functions are not expressible due to lack of higher-order types. Instead, there are default implementations of functions in the source files.

GitHub

View Github