xref: /llvm-project/lldb/test/API/lang/cpp/template-function/TestTemplateFunctions.py (revision 2238dcc39358353cac21df75c3c3286ab20b8f53) 
1"""
2Test that we can call C++ template fucntions.
3"""
4import lldb
5from lldbsuite.test.decorators import *
6from lldbsuite.test.lldbtest import *
7from lldbsuite.test import lldbutil
8
9
10class TemplateFunctionsTestCase(TestBase):
11    def do_test_template_function(self, add_cast):
12        self.build()
13        lldbutil.run_to_source_breakpoint(
14            self, "// break here", lldb.SBFileSpec("main.cpp", False)
15        )
16
17        if add_cast:
18            self.expect_expr("(int) foo(42)", result_type="int", result_value="42")
19        else:
20            self.expect(
21                "expr b1 <=> b2",
22                error=True,
23                substrs=[
24                    "warning: <user expression 0>:1:4: '<=>' is a single token in C++20; add a space to avoid a change in behavior"
25                ],
26            )
27
28            self.expect_expr("foo(42)", result_type="int", result_value="42")
29
30            # overload with template case
31            self.expect_expr("h(10)", result_type="int", result_value="10")
32
33            # ADL lookup case
34            self.expect_expr("f(A::C{})", result_type="int", result_value="4")
35
36            # ADL lookup but no overload
37            self.expect_expr("g(A::C{})", result_type="int", result_value="4")
38
39            # variadic function cases
40            self.expect_expr("var(1)", result_type="int", result_value="10")
41            self.expect_expr("var(1, 2)", result_type="int", result_value="10")
42
43            # Overloaded templated operator case
44            self.expect_expr("b1 > b2", result_type="bool", result_value="true")
45            self.expect_expr("b1 >> b2", result_type="bool", result_value="true")
46            self.expect_expr("b1 << b2", result_type="bool", result_value="true")
47            self.expect_expr("b1 == b2", result_type="bool", result_value="true")
48
49            # Overloaded operator case
50            self.expect_expr("d1 > d2", result_type="bool", result_value="true")
51            self.expect_expr("d1 >> d2", result_type="bool", result_value="true")
52            self.expect_expr("d1 << d2", result_type="bool", result_value="true")
53            self.expect_expr("d1 == d2", result_type="bool", result_value="true")
54
55    @skipIfWindows
56    def test_template_function_with_cast(self):
57        self.do_test_template_function(True)
58
59    @skipIfWindows
60    @expectedFailureAll(debug_info=["dwarf", "gmodules", "dwo"])
61    def test_template_function_without_cast(self):
62        self.do_test_template_function(False)
63