Swift: Fix for getFullName.

Author: geoffw0

swift/ql/lib/codeql/swift/elements/decl/TypeDecl.qll

@@ -28,8 +28,11 @@ class TypeDecl extends Generated::TypeDecl {
   cached
   string getFullName() {
     not this.getEnclosingDecl() instanceof TypeDecl and
+    not this.getEnclosingDecl() instanceof ExtensionDecl and
     result = this.getName()
     or
     result = this.getEnclosingDecl().(TypeDecl).getFullName() + "." + this.getName()
+    or
+    result = this.getEnclosingDecl().(ExtensionDecl).getExtendedTypeDecl().getFullName() + "." + this.getName()
   }
 }

swift/ql/test/library-tests/elements/decl/abstractfunctiondecl/abstractfunctiondecl.expected

@@ -6,4 +6,4 @@
 | abstractfunctiondecl.swift:21:2:21:16 | func5() | MethodDecl, getName:func5(), hasName:func5(), hasQualifiedName(2):Class3.func5(), hasQualifiedName(3):abstractfunctiondecl.Class3.func5(), memberOf:Class3 |
 | abstractfunctiondecl.swift:25:2:25:16 | func6() | MethodDecl, getName:func6(), hasName:func6(), hasQualifiedName(2):Struct1.func6(), hasQualifiedName(3):abstractfunctiondecl.Struct1.func6(), memberOf:Struct1 |
 | abstractfunctiondecl.swift:31:2:31:16 | func7() | MethodDecl, getName:func7(), hasName:func7(), hasQualifiedName(2):Enum1.func7(), hasQualifiedName(3):abstractfunctiondecl.Enum1.func7(), memberOf:Enum1 |
-| abstractfunctiondecl.swift:37:3:37:17 | func8() | MethodDecl, getName:func8(), hasName:func8(), hasQualifiedName(2):Class4.func8(), hasQualifiedName(3):abstractfunctiondecl.Class4.func8(), memberOf:Class4 |
+| abstractfunctiondecl.swift:37:3:37:17 | func8() | MethodDecl, getName:func8(), hasName:func8(), hasQualifiedName(2):Class1.Class4.func8(), hasQualifiedName(3):abstractfunctiondecl.Class1.Class4.func8(), memberOf:Class1.Class4 |