Swift Named Parameter Examples

geometry.swift

import Foundation

struct Point {
    var x: Float64
    var y: Float64

    init(_ x: Float64, _ y: Float64) {
        self.x = x
        self.y = y
    }
}

struct Line {
    var point1: Point
    var point2: Point

    init(_ point1: Point, _ point2: Point) {
        self.point1 = point1
        self.point2 = point2
    }
}

struct Circle {
    var center: Point
    var radius: Float64
}

struct Hexagon {
    // ...
}

func line(though point1: Point, atAngle angle: Float64) -> Line {
    return Line(point1, Point(point1.x + cos(angle), point1.y + sin(angle)))
}

func line(though point1: Point, _ point2: Point) -> Line {
    return Line(point1, point2)
}

func line(though point1: Point, inDirection direction: Point) -> Line {
    return Line(point1, Point(point1.x + direction.x, point1.y + direction.y))
}

func circle(center: Point, radius: Float64) -> Circle {
    fatalError("insert maths")
}

func circle(throughPoints point1: Point, _ point2: Point, _ point3: Point) -> Circle {
    fatalError("insert maths")
}

func circle(center: Point, tangentTo tangent: Line) -> Circle {
    fatalError("insert maths")
}

func hexagon(center: Point, outerRadius: Float64) -> Hexagon {
    fatalError("insert maths")
}

func hexagon(center: Point, innerRadius: Float64) -> Hexagon {
    fatalError("insert maths")
}

func hexagon(center: Point, edgeLength: Float64) -> Hexagon {
    fatalError("insert maths")
}

func hexagon(inscribing circle: Circle, atAngle angle: Float64) -> Hexagon {
    fatalError("insert maths")
}

func hexagon(circumscribing circle: Circle, atAngle angle: Float64) -> Hexagon {
    fatalError("insert maths")
}

let p1 = Point(1, 1)
let p2 = Point(2, 3)
let p3 = Point(0, 4)

let l1 = line(though: p1, atAngle: .pi)
_ = line(though: p1, p2)
_ = line(though: p1, inDirection: p2)

let c1 = circle(center: p1, radius: 15)
_ = circle(throughPoints: p1, p2, p3)
_ = circle(center: p1, tangentTo: l1)

_ = hexagon(center: p1, outerRadius: 15)
_ = hexagon(center: p1, innerRadius: 13)
_ = hexagon(center: p1, edgeLength: 3)
_ = hexagon(inscribing: c1, atAngle: .pi)
_ = hexagon(circumscribing: c1, atAngle: .pi)