Merge pull request #21056 from lorentey/error-hashing

[Foundation] Update hashing for bridged NSError protocols

Author: lorentey

stdlib/public/Darwin/Foundation/NSError.swift

@@ -406,7 +406,9 @@ extension _BridgedNSError where Self.RawValue: FixedWidthInteger {
     self.init(rawValue: RawValue(_bridgedNSError.code))
   }
 
-  public var hashValue: Int { return _code }
+  public func hash(into hasher: inout Hasher) {
+    hasher.combine(_code)
+  }
 }
 
 /// Describes a bridged error that stores the underlying NSError, so
@@ -480,9 +482,9 @@ public extension _BridgedStoredNSError {
 }
 
 /// Implementation of Hashable for all _BridgedStoredNSErrors.
-public extension _BridgedStoredNSError {
-  var hashValue: Int {
-    return _nsError.hashValue
+extension _BridgedStoredNSError {
+  public func hash(into hasher: inout Hasher) {
+    hasher.combine(_nsError)
   }
 }
 
@@ -568,10 +570,6 @@ public struct CocoaError : _BridgedStoredNSError {
     public init(rawValue: Int) {
       self.rawValue = rawValue
     }
-    
-    public var hashValue: Int {
-      return self.rawValue
-    }
   }
 }
 
@@ -1799,10 +1797,6 @@ public struct URLError : _BridgedStoredNSError {
     public init(rawValue: Int) {
       self.rawValue = rawValue
     }
-
-    public var hashValue: Int {
-      return self.rawValue
-    }
   }
 }