[lldb] Add test for calling const functions

CXX_SOURCES := main.cpp

include Makefile.rules

import lldb

from lldbsuite.test.decorators import *

from lldbsuite.test.lldbtest import *

from lldbsuite.test import lldbutil

class TestCase(TestBase):

    mydir = TestBase.compute_mydir(__file__)

    def test(self):

        self.build()

        lldbutil.run_to_source_breakpoint(self,"// break here", lldb.SBFileSpec("main.cpp"))

        # Test calling a function that has const/non-const overload.

        self.expect_expr("c.func()", result_type="int", result_value="111")

        self.expect_expr("const_c.func()", result_type="int", result_value="222")

        # Call a function that is only const on a const/non-const instance.

        self.expect_expr("c.const_func()", result_type="int", result_value="333")

        self.expect_expr("const_c.const_func()", result_type="int", result_value="333")

        # Call a function that is not const on a const/non-const instance.

        self.expect_expr("c.nonconst_func()", result_type="int", result_value="444")

        self.expect("expr const_c.nonconst_func()", error=True,

            substrs=["'this' argument to member function 'nonconst_func' has type 'const C', but function is not marked const"])

struct C {

  int func() { return 111; }

  int func() const { return 222; }

  int const_func() const { return 333; }

  int nonconst_func() { return 444; }

};

int main() {

  C c;

  const C const_c;

  c.func();

  c.nonconst_func();

  const_c.func();

  c.const_func();

  return 0; // break here

}