1""" 2Test default template arguments. 3""" 4 5import lldb 6from lldbsuite.test.decorators import * 7from lldbsuite.test.lldbtest import * 8from lldbsuite.test import lldbutil 9 10 11class TestDefaultTemplateArgs(TestBase): 12 @no_debug_info_test 13 def test(self): 14 self.build() 15 lldbutil.run_to_source_breakpoint( 16 self, "// break here", lldb.SBFileSpec("main.cpp") 17 ) 18 19 # Declare a template with a template argument that has a default argument. 20 self.expect( 21 "expr --top-level -- template<typename T = int> struct $X { int v; };" 22 ) 23 24 # The type we display to the user should omit the argument with the default 25 # value. 26 result = self.expect_expr("$X<> x; x", result_type="$X<>") 27 # The internal name should also always show all arguments (even if they 28 # have their default value). 29 self.assertEqual(result.GetTypeName(), "$X<int>") 30 31 # Test the template but this time specify a non-default value for the 32 # template argument. 33 # Both internal type name and the one we display to the user should 34 # show the non-default value in the type name. 35 result = self.expect_expr("$X<long> x; x", result_type="$X<long>") 36 self.assertEqual(result.GetTypeName(), "$X<long>") 37 38 # Test that the formatters are using the internal type names that 39 # always include all template arguments. 40 self.expect("type summary add '$X<int>' --summary-string 'summary1'") 41 self.expect_expr("$X<> x; x", result_summary="summary1") 42 self.expect("type summary add '$X<long>' --summary-string 'summary2'") 43 self.expect_expr("$X<long> x; x", result_summary="summary2") 44