libstdc++-v3/testsuite/20_util/any/assign/exception.cc

   1 // { dg-options "-std=gnu++17" }
   2 // { dg-do run }
   3
   4 // Copyright (C) 2016-2019 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 #include <any>
  22 #include <testsuite_hooks.h>
  23
  24 using std::any;
  25
  26 bool should_throw = false;
  27 struct Bad
  28 {
  29   Bad() = default;
  30   Bad(const Bad&) {if (should_throw) throw 666;}
  31 };
  32
  33 struct Bad2
  34 {
  35   Bad2() = default;
  36   Bad2(const Bad2&) {if (should_throw) throw 666;}
  37   Bad2(Bad2&&) noexcept {}
  38 };
  39
  40 int del_count = 0;
  41 struct Good
  42 {
  43   Good() = default;
  44   Good(const Good&) = default;
  45   Good(Good&&) = default;
  46   ~Good() {++del_count;}
  47 };
  48
  49 int main()
  50 {
  51     std::any a1 = Good();
  52     del_count = 0;
  53     try {
  54         Bad b;
  55         std::any a2 = b;
  56         should_throw = true;
  57         a1 = a2;
  58     } catch (...) {
  59         auto x = std::any_cast<Good>(a1);
  60         VERIFY( del_count == 0 );
  61         VERIFY( a1.has_value() );
  62         std::any_cast<Good>(a1);
  63     }
  64     std::any a3 = Good();
  65     del_count = 0;
  66     try {
  67         Bad2 b;
  68         std::any a4 = b;
  69         should_throw = true;
  70         a3 = a4;
  71     } catch (...) {
  72         auto x = std::any_cast<Good>(a1);
  73         VERIFY( del_count == 0 );
  74         VERIFY( a1.has_value() );
  75         std::any_cast<Good>(a1);
  76     }
  77 }