1 files changed, 38 insertions, 0 deletions
diff --git a/lldb/test/API/lang/cpp/class-template-parameter-pack/TestTemplatePackArgs.py b/lldb/test/API/lang/cpp/class-template-parameter-pack/TestTemplatePackArgs.py
new file mode 100644
index 000000000000..180d3f503c4f
--- /dev/null
+++ b/lldb/test/API/lang/cpp/class-template-parameter-pack/TestTemplatePackArgs.py
@@ -0,0 +1,38 @@
+"""
+Test that the type of arguments to C++ template classes that have variadic
+parameters can be enumerated.
+"""
+import lldb
+from lldbsuite.test.decorators import *
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test import lldbutil
+
+
+class TemplatePackArgsTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def test_template_argument_pack(self):
+        self.build()
+        (_, _, thread, _) = lldbutil.run_to_source_breakpoint(self,
+          'breakpoint here', lldb.SBFileSpec('main.cpp'), exe_name = 'a.out')
+        frame = thread.GetSelectedFrame()
+
+        empty_pack = frame.FindVariable('emptyPack')
+        self.assertTrue(empty_pack.IsValid(),
+                        'make sure we find the emptyPack variable')
+
+        only_pack = frame.FindVariable('onlyPack')
+        self.assertTrue(only_pack.IsValid(),
+                        'make sure we find the onlyPack variable')
+        self.assertEqual(only_pack.GetType().GetNumberOfTemplateArguments(), 4)
+        self.assertEqual(only_pack.GetType().GetTemplateArgumentType(0).GetName(), 'int')
+        self.assertEqual(only_pack.GetType().GetTemplateArgumentType(1).GetName(), 'char')
+        self.assertEqual(only_pack.GetType().GetTemplateArgumentType(2).GetName(), 'double')
+        # Access the C<double, 42> template parameter.
+        nested_template = only_pack.GetType().GetTemplateArgumentType(3)
+        self.assertEqual(nested_template.GetName(), 'D<int, int, bool>')
+        self.assertEqual(nested_template.GetNumberOfTemplateArguments(), 3)
+        self.assertEqual(nested_template.GetTemplateArgumentType(0).GetName(), 'int')
+        self.assertEqual(nested_template.GetTemplateArgumentType(1).GetName(), 'int')
+        self.assertEqual(nested_template.GetTemplateArgumentType(2).GetName(), 'bool')