libstdc++-v3/testsuite/performance/28_regex/range.cc

   1 // Copyright (C) 2014-2020 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 <regex>
  19 #include <testsuite_performance.h>
  20
  21 using namespace __gnu_test;
  22
  23 int main()
  24 {
  25   time_counter time;
  26   resource_counter resource;
  27
  28   start_counters(time, resource);
  29
  30   // this should get compiled to just L"[abcd]"
  31   auto re = std::wregex(L'[' + std::wstring(300, L'a') + L"bc"
  32                         + std::wstring(1000, 'a') + L"d]");
  33   bool ok = true;
  34   for (int i = 0; i < 100000; ++i)
  35     ok = ok && (std::regex_match(L"b", re) && std::regex_match(L"d", re));
  36
  37   stop_counters(time, resource);
  38   report_performance(__FILE__, "", time, resource);
  39
  40   return ok ? 0 : 1;
  41 }