Stuff

Author: karwa

Sources/SwiftPlot/Color.swift

@@ -45,6 +45,11 @@ extension Color {
       (other.b - b) * offset + b,
       (other.a - a) * offset + a)
   }
+    
+    public static func random() -> Color {
+        return Color(.random(in: 0...1.0), .random(in: 0...1.0),
+                     .random(in: 0...1.0), .random(in: 0...1.0))
+    }
 }
 
 #if canImport(CoreGraphics)

Sources/SwiftPlot/CopyOnWriteValue.swift

@@ -0,0 +1,45 @@
+
+public protocol Copyable {
+  func copy() -> Self
+}
+
+/// This is an implementation detail. You shouldn't conform to this yourself.
+@dynamicMemberLookup
+public protocol _CopyOnWriteValue {
+  associatedtype _COWStorage: AnyObject, Copyable
+  var _storage: _COWStorage { get set }
+}
+
+extension _CopyOnWriteValue {
+  public subscript<T>(dynamicMember keypath: KeyPath<_COWStorage, T>) -> T {
+    get { _storage[keyPath: keypath] }
+  }
+  public subscript<T>(dynamicMember keypath: ReferenceWritableKeyPath<_COWStorage, T>) -> T {
+    get { _storage[keyPath: keypath] }
+    _modify {
+      if !isKnownUniquelyReferenced(&_storage) { _storage = _storage.copy() }
+      yield &_storage[keyPath: keypath]
+    }
+    set {
+      if !isKnownUniquelyReferenced(&_storage) { _storage = _storage.copy() }
+      _storage[keyPath: keypath] = newValue
+    }
+  }
+}
+
+public struct TestObj: _CopyOnWriteValue {
+  
+  public final class _COWStorage: Copyable {
+    public var propOne: Int
+    public var propTwo: String
+    public func copy() -> Self {
+      print("copying")
+      return Self(propOne, propTwo)
+    }
+    
+    init(_ p1: Int, _ p2: String) { self.propOne = p1; self.propTwo = p2 }
+  }
+  public var _storage = _COWStorage(0, "")
+  
+  public init() {}
+}