libcxx/test/std/language.support/support.exception/except.nested/assign.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 // <exception>
  10
  11 // class nested_exception;
  12
  13 // nested_exception& operator=(const nested_exception&) throw() = default;
  14
  15 #include <exception>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19
  20 class A
  21 {
  22     int data_;
  23 public:
  24     explicit A(int data) : data_(data) {}
  25
  26     friend bool operator==(const A& x, const A& y) {return x.data_ == y.data_;}
  27 };
  28
  29 int main(int, char**)
  30 {
  31     {
  32         std::nested_exception e0;
  33         std::nested_exception e;
  34         e = e0;
  35         assert(e.nested_ptr() == nullptr);
  36     }
  37 #ifndef TEST_HAS_NO_EXCEPTIONS
  38     {
  39         try
  40         {
  41             throw A(2);
  42             assert(false);
  43         }
  44         catch (const A&)
  45         {
  46             std::nested_exception e0;
  47             std::nested_exception e;
  48             e = e0;
  49             assert(e.nested_ptr() != nullptr);
  50             try
  51             {
  52                 std::rethrow_exception(e.nested_ptr());
  53                 assert(false);
  54             }
  55             catch (const A& a)
  56             {
  57                 assert(a == A(2));
  58             }
  59         }
  60     }
  61 #endif
  62
  63   return 0;
  64 }