| // Copyright (C) 2016-2021 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| // { dg-do run { target c++11 } } |
| |
| // libstdc++/56166 |
| |
| #ifndef _GLIBCXX_USE_CXX11_ABI |
| # define _GLIBCXX_USE_CXX11_ABI 0 |
| #endif |
| #include <string> |
| #include <new> |
| |
| static int fail_after = -1; |
| |
| template<typename T> |
| struct Allocator |
| { |
| using value_type = T; |
| |
| // Need these typedefs because COW string doesn't use allocator_traits. |
| using pointer = T*; |
| using const_pointer = const T*; |
| using reference = T&; |
| using const_reference = const T&; |
| using difference_type = long; |
| using size_type = unsigned long; |
| template<typename U> |
| struct rebind { |
| using other = Allocator<U>; |
| }; |
| |
| Allocator() { } |
| |
| template<typename U> |
| Allocator(const Allocator<U>&) { } |
| |
| T* allocate(size_type n) |
| { |
| if (fail_after >= 0) { |
| if (fail_after-- == 0) { |
| throw std::bad_alloc(); |
| } |
| } |
| return (T*)new char[n * sizeof(T)]; |
| } |
| |
| void deallocate(T* p, size_type) |
| { |
| delete[] (char*)p; |
| } |
| }; |
| |
| template<typename T, typename U> |
| bool operator==(const Allocator<T>&, const Allocator<U>&) { return true; } |
| template<typename T, typename U> |
| bool operator!=(const Allocator<T>&, const Allocator<U>&) { return false; } |
| |
| using string = std::basic_string<char, std::char_traits<char>, Allocator<char>>; |
| |
| string f() |
| { |
| string s1("xxxxxx"); |
| string s2 = s1; |
| s1.clear(); |
| return s2; |
| } |
| |
| int main() |
| { |
| for (int i = 0; i < 10; i++) { |
| try { |
| fail_after = i; |
| f(); |
| break; |
| } catch (const std::bad_alloc&) { |
| } |
| } |
| } |