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      1 """
      2 Tests that rvalue references are supported in C++
      3 """
      4 
      5 import lldb
      6 from lldbtest import *
      7 import lldbutil
      8 
      9 class 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         
     69 if __name__ == '__main__':
     70     import atexit
     71     lldb.SBDebugger.Initialize()
     72     atexit.register(lambda: lldb.SBDebugger.Terminate())
     73     unittest2.main()
     74