A prelude for programming with functors
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.