libcxx/test/std/language.support/support.exception/uncaught/uncaught_exception.pass.cpp

   1 //===----------------------------------------------------------------------===//
   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 // UNSUPPORTED: no-exceptions
  10
  11 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_ENABLE_CXX20_REMOVED_UNCAUGHT_EXCEPTION
  12 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
  13
  14 // test uncaught_exception
  15
  16 #include <exception>
  17 #include <cassert>
  18
  19 #include "test_macros.h"
  20
  21 struct A
  22 {
  23     ~A()
  24     {
  25         assert(std::uncaught_exception());
  26     }
  27 };
  28
  29 struct B
  30 {
  31     B()
  32     {
  33         // http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#475
  34         assert(!std::uncaught_exception());
  35     }
  36 };
  37
  38 int main(int, char**)
  39 {
  40     try
  41     {
  42         A a;
  43         assert(!std::uncaught_exception());
  44         throw B();
  45     }
  46     catch (...)
  47     {
  48         assert(!std::uncaught_exception());
  49     }
  50     assert(!std::uncaught_exception());
  51
  52   return 0;
  53 }