libstdc++-v3/testsuite/26_numerics/accumulate/48750.cc

   1 // Copyright (C) 2011-2018 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 #include <vector>
  19 #include <numeric>
  20
  21 class NaturalParameters
  22 {
  23 public:
  24
  25   NaturalParameters()
  26   : m_data(2)
  27   {  }
  28
  29   std::vector<double>::const_iterator
  30   begin() const
  31   { return m_data.begin(); }
  32
  33   std::vector<double>::const_iterator
  34   end() const
  35   { return m_data.begin(); }
  36
  37   NaturalParameters&
  38   operator+=(const NaturalParameters&)
  39   { return *this; }
  40
  41 private:
  42   std::vector<double> m_data;
  43 };
  44
  45 inline
  46 NaturalParameters
  47 operator+(const NaturalParameters& a, const NaturalParameters& b)
  48 {
  49   NaturalParameters tmp = a;
  50   return tmp += b;
  51 }
  52
  53 // libstdc++/48750
  54 void test01()
  55 {
  56   // Used to fail in parallel-mode with a segfault.
  57   for (std::size_t i = 0; i < 1000; ++i)
  58     {
  59       std::vector<NaturalParameters> ChildrenNP(1000);
  60       NaturalParameters init;
  61       NaturalParameters NP = std::accumulate(ChildrenNP.begin(),
  62                                              ChildrenNP.end(), init);
  63     }
  64 }
  65
  66 int main()
  67 {
  68   test01();
  69   return 0;
  70 }