Swift: Restore UnknownLocation.toString(), it seems helpful.

geoffw0 · geoffw0 · commit 3b9151cb2418 · 2022-10-17T13:11:22.000+01:00
diff --git a/swift/ql/lib/codeql/swift/elements/UnknownLocation.qll b/swift/ql/lib/codeql/swift/elements/UnknownLocation.qll
@@ -12,4 +12,6 @@ class UnknownLocation extends UnknownLocationBase {
   override int getEndLine() { result = 0 }
 
   override int getEndColumn() { result = 0 }
+
+  override string toString() { result = "UnknownLocation" }
 }
diff --git a/swift/ql/test/library-tests/elements/location/location.expected b/swift/ql/test/library-tests/elements/location/location.expected
@@ -1,4 +1,4 @@
-| file://:0:0:0:0 | file://:0:0:0:0 |
+| file://:0:0:0:0 | UnknownLocation |
 | location.swift:2:1:3:1 | location.swift:2:1:3:1 |
 | location.swift:2:11:2:14 | location.swift:2:11:2:14 |
 | location.swift:2:19:3:1 | location.swift:2:19:3:1 |

Original file line number	Diff line number	Diff line change
`@@ -12,4 +12,6 @@ class UnknownLocation extends UnknownLocationBase {`
`12`	`12`	`override int getEndLine() { result = 0 }`
`13`	`13`
`14`	`14`	`override int getEndColumn() { result = 0 }`
	`15`	`+`
	`16`	`+ override string toString() { result = "UnknownLocation" }`
`15`	`17`	`}`