libcxx/test/std/language.support/support.exception/propagation/rethrow_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 // <exception>
  11
  12 // void rethrow_exception [[noreturn]] (exception_ptr p);
  13
  14 #include <exception>
  15 #include <cassert>
  16
  17 #include "test_macros.h"
  18
  19 struct A
  20 {
  21     static int constructed;
  22     int data_;
  23
  24     A(int data = 0) : data_(data) {++constructed;}
  25     ~A() {--constructed;}
  26     A(const A& a) : data_(a.data_) {++constructed;}
  27 };
  28
  29 int A::constructed = 0;
  30
  31 int main(int, char**)
  32 {
  33     {
  34         std::exception_ptr p;
  35         try
  36         {
  37             throw A(3);
  38         }
  39         catch (...)
  40         {
  41             p = std::current_exception();
  42         }
  43         try
  44         {
  45             std::rethrow_exception(p);
  46             assert(false);
  47         }
  48         catch (const A& a)
  49         {
  50 #ifndef TEST_ABI_MICROSOFT
  51             assert(A::constructed == 1);
  52 #else
  53             // On Windows the exception_ptr copies the exception
  54             assert(A::constructed == 2);
  55 #endif
  56             assert(p != nullptr);
  57             p = nullptr;
  58             assert(p == nullptr);
  59             assert(a.data_ == 3);
  60             assert(A::constructed == 1);
  61         }
  62         assert(A::constructed == 0);
  63     }
  64     assert(A::constructed == 0);
  65
  66   return 0;
  67 }