SaganRitual

import CoreGraphics

/// Arithmetic extensions for CGPoint, CGSize, and CGVector.
/// All of the operators +, -, *, /, and unary minus are supported. Where
/// applicable, operators can be applied to point/size/vector + point/size/vector,
/// as well as point/size/vector + CGFloat and CGFloat + point/size/vector.
protocol Overload2D {
    /// Really for internal use, but publicly available so the unit tests can use them.
    var a: CGFloat { get set }
    var b: CGFloat { get set }

SaganRitual

// We are a way for the cosmos to know itself. -- C. Sagan

import SwiftUI

class ChildState: ObservableObject {
    @Published var childData = 0
}

struct Parent: View {
    @State var parentData = 0