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"""
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):
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")
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