Foundation: Provide a Hashable.hashValue witness for _BridgedStoredNSError conformers

slavapestov · slavapestov · commit e0bba70923fe · 2019-05-18T11:35:05.000-04:00
Previously we would synthesize this in Sema, but this no longer
works when conformance checking is triggered by SILGen.
diff --git a/stdlib/public/Darwin/Foundation/NSError.swift b/stdlib/public/Darwin/Foundation/NSError.swift
@@ -489,6 +489,10 @@ extension _BridgedStoredNSError {
   public func hash(into hasher: inout Hasher) {
     hasher.combine(_nsError)
   }
+
+  @_alwaysEmitIntoClient public var hashValue: Int {
+    return _nsError.hashValue
+  }
 }
 
 /// Describes the code of an error.

Original file line number	Diff line number	Diff line change
`@@ -489,6 +489,10 @@ extension _BridgedStoredNSError {`
`489`	`489`	`public func hash(into hasher: inout Hasher) {`
`490`	`490`	`hasher.combine(_nsError)`
`491`	`491`	`}`
	`492`	`+`
	`493`	`+ @_alwaysEmitIntoClient public var hashValue: Int {`
	`494`	`+ return _nsError.hashValue`
	`495`	`+ }`
`492`	`496`	`}`
`493`	`497`
`494`	`498`	`/// Describes the code of an error.`