Add Never to Equatable and Hashable Swift 5.0

Author: emreozdil

codes/ConformNeverToEquatableAndHashableSwift5.swift

@@ -0,0 +1,21 @@
+// Conform Never to Equatable and Hashable Swift 5.0
+
+// Proposal: SE-0215
+// Never is very useful for representing impossible code.
+// Most people are familiar with it as the return type of
+// functions like fatalError, but Never is also useful
+// when working with generic classes.
+// The standard library should add Equatable and Hashable
+// implementations for Never:
+
+extension Never: Equatable {
+  public static func == (lhs: Never, rhs: Never) -> Bool {
+    switch (lhs, rhs) {
+    }
+  }
+}
+
+extension Never: Hashable {
+  public func hash(into hasher: inout Hasher) {
+  }
+}