$ whois swift

Swift

first released in 2014 · by Chris Lattner, Doug Gregor, John McCall, Ted Kremenek, Joe Groff

$ guessprog --inspect swift

year: 2014
paradigm: multi paradigm
family: c like
memory: automatic gc
binding: static
safety: strong

SWIFT(7)

AUTHORS: Chris Lattner, Doug Gregor, John McCall, Ted Kremenek, Joe Groff
HISTORY: Chris Lattner, who had earlier created the LLVM compiler infrastructure, started working on Swift in secret at Apple in 2010, later joined by a growing team of engineers. Apple unveiled it as a surprise at its WWDC conference in June 2014, as a safer and more modern replacement for Objective-C. Swift was open-sourced in December 2015 and has since been ported to Linux and Windows.
USAGE: The main language for developing apps on Apple platforms (iOS, macOS, watchOS and more), used by a very large community of mobile developers. Server-side and embedded use exists but remains small compared to its Apple ecosystem.
SEE ALSO: Swift on Wikipedia ↗

$ cat point.swift

struct Point { var x = 0.0, y = 0.0 }

extension Point {
    static func + (a: Point, b: Point) -> Point {
        Point(x: a.x + b.x, y: a.y + b.y)
    }
}

let path: [Point?] = [Point(x: 1), nil, Point(y: 2)]
let end = path.compactMap { $0 }.reduce(Point(), +)

if let first = path.first ?? nil {
    print("from \(first) to \(end)")
}