libstdc++-v3/testsuite/23_containers/stack/cons_from_iters.cc

   1 // Copyright (C) 2021-2025 Free Software Foundation, Inc.
   2 //
   3 // This file is part of the GNU ISO C++ Library.  This library is free
   4 // software; you can redistribute it and/or modify it under the
   5 // terms of the GNU General Public License as published by the
   6 // Free Software Foundation; either version 3, or (at your option)
   7 // any later version.
   8
   9 // This library is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13
  14 // You should have received a copy of the GNU General Public License along
  15 // with this library; see the file COPYING3.  If not see
  16 // <http://www.gnu.org/licenses/>.
  17
  18 // { dg-do run { target c++23 } }
  19 // { dg-add-options no_pch }
  20
  21 #include <stack>
  22
  23 #ifndef __cpp_lib_adaptor_iterator_pair_constructor
  24 #error Feature test macro for iterator pair constructors is missing in <stack>
  25 #elif __cpp_lib_adaptor_iterator_pair_constructor != 202106L
  26 #error Feature test macro for iterator pair constructors has wrong value in <stack>
  27 #endif
  28
  29 #include <testsuite_hooks.h>
  30 #include <testsuite_allocator.h>
  31
  32 void
  33 test_p1425r4()
  34 {
  35   const int vals[] = { 1, 2, 3, 7, 8, 9, 5, 6, 7 };
  36
  37   std::stack<int> s(std::begin(vals), std::end(vals));
  38   VERIFY( s.size() == std::size(vals) );
  39   VERIFY( s.top() == 7 );
  40
  41   using Alloc = __gnu_test::uneq_allocator<int>;
  42
  43   struct Stack : std::stack<int, std::deque<int, Alloc>>
  44   {
  45     using stack::stack;
  46
  47     Alloc get_allocator() const { return c.get_allocator(); }
  48   };
  49
  50   Alloc a0, a1(1);
  51   Stack s0(std::begin(vals), std::end(vals) - 1);
  52   VERIFY( s0.size() == std::size(vals) - 1 );
  53   VERIFY( s0.top() == 6 );
  54   VERIFY( s0.get_allocator() == a0 );
  55
  56   Stack s1(std::begin(vals), std::end(vals) - 2, a1);
  57   VERIFY( s1.size() == std::size(vals) - 2 );
  58   VERIFY( s1.top() == 5 );
  59   VERIFY( s1.get_allocator() == a1 );
  60 }
  61
  62 int main()
  63 {
  64   test_p1425r4();
  65 }