Swift: add INTERNAL doc marker to ql.internal classes

swift/codegen/lib/ql.py

@@ -131,7 +131,7 @@ class Class:
 
     @property
     def has_doc(self) -> bool:
-        return bool(self.doc)
+        return bool(self.doc) or self.ql_internal
 
 
 @dataclass

swift/codegen/templates/ql_class.mustache

@@ -11,6 +11,9 @@ module Generated {
   {{#doc}}
    * {{.}}
   {{/doc}}
+  {{#ql_internal}}
+   * INTERNAL: Do not use.
+  {{/ql_internal}}
    */
   {{/has_doc}}
   class {{name}} extends Synth::T{{name}}{{#bases}}, {{.}}{{/bases}} {

swift/codegen/templates/ql_stub.mustache

@@ -1,4 +1,9 @@
 // generated by {{generator}}, remove this comment if you wish to edit this file
 private import {{base_import}}
 
+{{#ql_internal}}
+/**
+ * INTERNAL: Do not use.
+ */
+{{/ql_internal}}
 class {{name}} extends Generated::{{name}} {}

swift/codegen/test/test_ql.py

@@ -127,14 +127,16 @@ def test_class_with_children():
     assert cls.has_children is True
 
 
-def test_class_with_doc():
-    cls = ql.Class("Class", doc=["foo", "bar"])
-    assert cls.has_doc is True
-
-
-def test_class_without_doc():
-    cls = ql.Class("Class", doc=[])
-    assert cls.has_doc is False
+@pytest.mark.parametrize("doc,ql_internal,expected",
+                         [
+                             (["foo", "bar"], False, True),
+                             (["foo", "bar"], True, True),
+                             ([], False, False),
+                             ([], True, True),
+                         ])
+def test_has_doc(doc, ql_internal, expected):
+    cls = ql.Class("Class", doc=doc, ql_internal=ql_internal)
+    assert cls.has_doc is expected
 
 
 def test_property_with_description():