Apply suggestions from code review

Co-Authored-By: ikesyo <[email protected]>

Author: lorentey

Foundation/Calendar.swift

@@ -862,9 +862,9 @@ public struct Calendar : Hashable, Equatable, ReferenceConvertible, _MutableBoxi
     public func hash(into hasher: inout Hasher) {
         // We implement hash ourselves, because we need to make sure autoupdating calendars have the same hash
         if _autoupdating {
-            hasher.combine(1)
+            hasher.combine(1 as Int8)
         } else {
-            hasher.combine(_handle.map { $0.hash })
+            hasher.combine(_handle.map { $0 })
         }
     }
 

Foundation/CharacterSet.swift

@@ -170,7 +170,7 @@ public struct CharacterSet : ReferenceConvertible, Equatable, Hashable, SetAlgeb
     }
 
     public func hash(into hasher: inout Hasher) {
-        hasher.combine(_mapUnmanaged { $0.hashValue })
+        hasher.combine(_mapUnmanaged { $0 })
     }
 
     public var description: String {

Foundation/DateComponents.swift

@@ -303,7 +303,7 @@ public struct DateComponents : ReferenceConvertible, Hashable, Equatable, _Mutab
     // MARK: -
 
     public func hash(into hasher: inout Hasher) {
-        hasher.combine(_handle.map { $0.hash })
+        hasher.combine(_handle.map { $0 })
     }
 
     public static func ==(lhs: DateComponents, rhs: DateComponents) -> Bool {

Foundation/IndexSet.swift

@@ -174,7 +174,7 @@ public struct IndexSet : ReferenceConvertible, Equatable, BidirectionalCollectio
     }
 
     public func hash(into hasher: inout Hasher) {
-        hasher.combine(_handle.map { $0.hash })
+        hasher.combine(_handle.map { $0 })
     }
 
     /// Returns the number of integers in `self`.

Foundation/Locale.swift

@@ -423,9 +423,9 @@ public struct Locale : CustomStringConvertible, CustomDebugStringConvertible, Ha
 
     public func hash(into hasher: inout Hasher) {
         if _autoupdating {
-            hasher.combine(1)
+            hasher.combine(1 as Int8)
         } else {
-            hasher.combine(_wrapped.hash)
+            hasher.combine(_wrapped)
         }
     }
 

Foundation/PersonNameComponents.swift

@@ -69,7 +69,7 @@ public struct PersonNameComponents : ReferenceConvertible, Hashable, Equatable,
     }
 
     public func hash(into hasher: inout Hasher) {
-        hasher.combine(_handle.map { $0.hash })
+        hasher.combine(_handle.map { $0 })
     }
 
     public static func ==(lhs : PersonNameComponents, rhs: PersonNameComponents) -> Bool {

Foundation/TimeZone.swift

@@ -212,9 +212,9 @@ public struct TimeZone : Hashable, Equatable, ReferenceConvertible {
 
     public func hash(into hasher: inout Hasher) {
         if _autoupdating {
-            hasher.combine(1)
+            hasher.combine(1 as Int8)
         } else {
-            hasher.combine(_wrapped.hash)
+            hasher.combine(_wrapped)
         }
     }
 

Foundation/URL.swift

@@ -504,7 +504,7 @@ public struct URL : ReferenceConvertible, Equatable {
     }
 
     public func hash(into hasher: inout Hasher) {
-        hasher.combine(_url.hash)
+        hasher.combine(_url)
     }
 
     // MARK: -

Foundation/URLComponents.swift

@@ -275,7 +275,7 @@ public struct URLComponents : ReferenceConvertible, Hashable, Equatable, _Mutabl
     }
 
     public func hash(into hasher: inout Hasher) {
-        hasher.combine(_handle.map { $0.hash })
+        hasher.combine(_handle.map { $0 })
     }
 
     // MARK: - Bridging
@@ -348,7 +348,7 @@ public struct URLQueryItem : ReferenceConvertible, Hashable, Equatable {
     }
 
     public func hash(into hasher: inout Hasher) {
-        hasher.combine(_queryItem.hash)
+        hasher.combine(_queryItem)
     }
 
     public static func ==(lhs: URLQueryItem, rhs: URLQueryItem) -> Bool {

Foundation/URLRequest.swift

@@ -228,7 +228,7 @@ public struct URLRequest : ReferenceConvertible, Equatable, Hashable {
     }
 
     public func hash(into hasher: inout Hasher) {
-        hasher.combine(_handle.map { $0.hashValue })
+        hasher.combine(_handle.map { $0 })
     }
 
     public static func ==(lhs: URLRequest, rhs: URLRequest) -> Bool {