1  //===--------------- catch_member_function_pointer_02.cpp -----------------===//
 2  //
 3  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 4  // See https://llvm.org/LICENSE.txt for license information.
 5  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 6  //
 7  //===----------------------------------------------------------------------===//
 8  
 9  // Can a noexcept member function pointer be caught by a non-noexcept catch clause?
10  // UNSUPPORTED: no-exceptions, no-noexcept-function-type
11  
12  // Support for catching a function pointer including noexcept was shipped in macOS 10.13
13  // XFAIL: use_system_cxx_lib && {{.+}}-apple-macosx10.{{9|10|11|12}}
14  
15  // GCC 7 and 8 support noexcept function types but this test still fails.
16  // This is likely a bug in their implementation. Investigation needed.
17  // XFAIL: gcc-7, gcc-8, gcc-9, gcc-10, gcc-11
18  
19  #include <cassert>
20  
21  struct X {
22    template<bool Noexcept> void f() noexcept(Noexcept) {}
23  };
24  template<bool Noexcept> using FnType = void (X::*)() noexcept(Noexcept);
25  
26  template<bool ThrowNoexcept, bool CatchNoexcept>
27  void check()
28  {
29      try
30      {
31          auto p = &X::f<ThrowNoexcept>;
32          throw p;
33          assert(false);
34      }
35      catch (FnType<CatchNoexcept> p)
36      {
37          assert(ThrowNoexcept || !CatchNoexcept);
38          assert(p == &X::f<ThrowNoexcept>);
39      }
40      catch (...)
41      {
42          assert(!ThrowNoexcept && CatchNoexcept);
43      }
44  }
45  
46  void check_deep() {
47      FnType<true> p = &X::f<true>;
48      try
49      {
50          throw &p;
51      }
52      catch (FnType<false> *q)
53      {
54          assert(false);
55      }
56      catch (FnType<true> *q)
57      {
58      }
59      catch (...)
60      {
61          assert(false);
62      }
63  }
64  
65  int main(int, char**)
66  {
67      check<false, false>();
68      check<false, true>();
69      check<true, false>();
70      check<true, true>();
71      check_deep();
72  
73      return 0;
74  }