Swift: fix codescanning warnings

Author: redsun82

swift/codegen/templates/ql_class.mustache

@@ -29,7 +29,7 @@ class {{name}}Base extends Ipa::T{{name}}{{#bases}}, {{.}}{{/bases}} {
   {{#type_is_class}}
   {{type}} getImmediate{{singular}}({{#is_repeated}}int index{{/is_repeated}}) {
     {{#has_db_id}}
-    result = Ipa::convert{{type}}FromDb(Ipa::convert{{name}}ToDb(this).(Db::{{name}}).{{getter}}({{#is_repeated}}index{{/is_repeated}}))
+    result = Ipa::convert{{type}}FromDb(Ipa::convert{{name}}ToDb(this){{^root}}.(Db::{{name}}){{/root}}.{{getter}}({{#is_repeated}}index{{/is_repeated}}))
     {{/has_db_id}}
     {{^has_db_id}}
     none()
@@ -44,7 +44,7 @@ class {{name}}Base extends Ipa::T{{name}}{{#bases}}, {{.}}{{/bases}} {
   {{^type_is_class}}
   {{type}} {{getter}}({{#is_repeated}}int index{{/is_repeated}}) {
     {{#has_db_id}}
-    {{^is_predicate}}result = {{/is_predicate}}Ipa::convert{{name}}ToDb(this).(Db::{{name}}).{{getter}}({{#is_repeated}}index{{/is_repeated}})
+    {{^is_predicate}}result = {{/is_predicate}}Ipa::convert{{name}}ToDb(this){{^root}}.(Db::{{name}}){{/root}}.{{getter}}({{#is_repeated}}index{{/is_repeated}})
     {{/has_db_id}}
     {{^has_db_id}}
     none()

swift/ql/lib/codeql/swift/elements/expr/ImplicitConversionExpr.qll

@@ -1,7 +1,7 @@
 private import codeql.swift.generated.expr.ImplicitConversionExpr
 
 class ImplicitConversionExpr extends ImplicitConversionExprBase {
-  override predicate convertsFrom(Expr e) { e = getImmediateSubExpr() }
+  override predicate convertsFrom(Expr e) { e = this.getImmediateSubExpr() }
 
   override string toString() { result = "(" + this.getType().toString() + ") ..." }
 }

swift/ql/lib/codeql/swift/elements/expr/OneWayExpr.qll

@@ -1,7 +1,7 @@
 private import codeql.swift.generated.expr.OneWayExpr
 
 class OneWayExpr extends OneWayExprBase {
-  override predicate convertsFrom(Expr e) { e = getImmediateSubExpr() }
+  override predicate convertsFrom(Expr e) { e = this.getImmediateSubExpr() }
 
   override string toString() { result = this.getSubExpr().toString() }
 }

swift/ql/lib/codeql/swift/generated/Element.qll

@@ -17,5 +17,5 @@ class ElementBase extends Ipa::TElement {
     result = getResolveStep().resolve()
   }
 
-  predicate isUnknown() { Ipa::convertElementToDb(this).(Db::Element).isUnknown() }
+  predicate isUnknown() { Ipa::convertElementToDb(this).isUnknown() }
 }