1"""
2Tests that rvalue references are supported in C++
3"""
4
5import lldb
6from lldbtest import *
7import lldbutil
8
9class RvalueReferencesTestCase(TestBase):
10
11    mydir = os.path.join("lang", "cpp", "rvalue-references")
12
13    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
14    #rdar://problem/11479676
15    @expectedFailureClang
16    @dsym_test
17    def test_with_dsym_and_run_command(self):
18        """Test that rvalues are supported in the C++ expression parser"""
19        self.buildDsym()
20        self.static_method_commands()
21
22    #rdar://problem/11479676
23    @expectedFailureClang # pr16762: Expression evaluation of an rvalue-reference does not show the correct type.
24    @expectedFailureGcc # GCC (4.7) does not emit correct DWARF tags for rvalue-references
25    @expectedFailureIcc # ICC (13.1, 14-beta) do not emit DW_TAG_rvalue_reference_type.
26    @dwarf_test
27    def test_with_dwarf_and_run_command(self):
28        """Test that rvalues are supported in the C++ expression parser"""
29        self.buildDwarf()
30        self.static_method_commands()
31
32    def setUp(self):
33        TestBase.setUp(self)
34
35    def set_breakpoint(self, line):
36        lldbutil.run_break_set_by_file_and_line (self, "main.cpp", line, num_expected_locations=1, loc_exact=True)
37
38    def static_method_commands(self):
39        """Test that rvalues are supported in the C++ expression parser"""
40        self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
41
42        self.set_breakpoint(line_number('main.cpp', '// breakpoint 1'))
43        self.set_breakpoint(line_number('main.cpp', '// breakpoint 2'))
44
45        self.runCmd("process launch", RUN_SUCCEEDED)
46
47        # Note that clang as of r187480 doesn't emit DW_TAG_const_type, unlike gcc 4.8.1
48        # With gcc 4.8.1, lldb reports the type as (int &&const)
49        self.expect("frame variable i",
50                    startstr = "(int &&",
51                    substrs = ["i = 0x", "&i = 3"])
52
53        self.expect("expression -- i",
54                    startstr = "(int &&",
55                    substrs = ["3"])
56
57        self.expect("breakpoint delete 1")
58
59        self.runCmd("process continue")
60
61        self.expect("expression -- foo(2)")
62
63        self.expect("expression -- int &&j = 3; foo(j)",
64                    error = True)
65
66        self.expect("expression -- int &&k = 6; k",
67                    startstr = "(int) $1 = 6")
68
69if __name__ == '__main__':
70    import atexit
71    lldb.SBDebugger.Initialize()
72    atexit.register(lambda: lldb.SBDebugger.Terminate())
73    unittest2.main()
74