1"""
2Test that the type of arguments to C++ template classes that have variadic
3parameters can be enumerated.
4"""
5import lldb
6from lldbsuite.test.decorators import *
7from lldbsuite.test.lldbtest import *
8from lldbsuite.test import lldbutil
9
10
11class TemplatePackArgsTestCase(TestBase):
12
13    mydir = TestBase.compute_mydir(__file__)
14
15    def test_template_argument_pack(self):
16        self.build()
17        (_, _, thread, _) = lldbutil.run_to_source_breakpoint(self,
18          'breakpoint here', lldb.SBFileSpec('main.cpp'), exe_name = 'a.out')
19        frame = thread.GetSelectedFrame()
20
21        empty_pack = frame.FindVariable('emptyPack')
22        self.assertTrue(empty_pack.IsValid(),
23                        'make sure we find the emptyPack variable')
24
25        only_pack = frame.FindVariable('onlyPack')
26        self.assertTrue(only_pack.IsValid(),
27                        'make sure we find the onlyPack variable')
28        self.assertEqual(only_pack.GetType().GetNumberOfTemplateArguments(), 4)
29        self.assertEqual(only_pack.GetType().GetTemplateArgumentType(0).GetName(), 'int')
30        self.assertEqual(only_pack.GetType().GetTemplateArgumentType(1).GetName(), 'char')
31        self.assertEqual(only_pack.GetType().GetTemplateArgumentType(2).GetName(), 'double')
32        # Access the C<double, 42> template parameter.
33        nested_template = only_pack.GetType().GetTemplateArgumentType(3)
34        self.assertEqual(nested_template.GetName(), 'D<int, int, bool>')
35        self.assertEqual(nested_template.GetNumberOfTemplateArguments(), 3)
36        self.assertEqual(nested_template.GetTemplateArgumentType(0).GetName(), 'int')
37        self.assertEqual(nested_template.GetTemplateArgumentType(1).GetName(), 'int')
38        self.assertEqual(nested_template.GetTemplateArgumentType(2).GetName(), 'bool')
39