mirror of
https://github.com/github/semantic.git
synced 2024-12-22 06:11:49 +03:00
32 lines
525 B
Swift
32 lines
525 B
Swift
func fix<T, U>(f: (T -> U) -> T -> U) -> T -> U {
|
|
return { f(fix(f))($0) }
|
|
}
|
|
|
|
|
|
func id<A>(a: A) -> A {
|
|
return a
|
|
}
|
|
|
|
func const<A, B>(a: A)(_ b: B) -> A {
|
|
return a
|
|
}
|
|
|
|
|
|
func >>> <T, U, V> (f: T -> U, g: U -> V) -> T -> V {
|
|
return { g(f($0)) }
|
|
}
|
|
|
|
|
|
extension Optional {
|
|
static func equals(param: (Wrapped, Wrapped) -> Bool)(_ left: Wrapped?, _ right: Wrapped?) -> Bool {
|
|
switch (left, right) {
|
|
case let (.Some(a), .Some(b)):
|
|
return param(a, b)
|
|
case (.None, .None):
|
|
return true
|
|
default:
|
|
return false
|
|
}
|
|
}
|
|
}
|