libstdc++-v3/testsuite/28_regex/iterators/regex_iterator/char/string_position_01.cc

   1 // { dg-do run { target c++11 } }
   2 // { dg-timeout-factor 2 }
   3
   4 //
   5 // 2013-07-25  Tim Shen <timshen91@gmail.com>
   6 //
   7 // Copyright (C) 2013-2021 Free Software Foundation, Inc.
   8 //
   9 // This file is part of the GNU ISO C++ Library.  This library is free
  10 // software; you can redistribute it and/or modify it under the
  11 // terms of the GNU General Public License as published by the
  12 // Free Software Foundation; either version 3, or (at your option)
  13 // any later version.
  14 //
  15 // This library is distributed in the hope that it will be useful,
  16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 // GNU General Public License for more details.
  19 //
  20 // You should have received a copy of the GNU General Public License along
  21 // with this library; see the file COPYING3.  If not see
  22 // <http://www.gnu.org/licenses/>.
  23
  24 // 28.12.1 regex_iterator
  25 // Tests iter->position() behavior
  26
  27 #include <regex>
  28 #include <tuple>
  29 #include <testsuite_hooks.h>
  30
  31 void
  32 test01()
  33 {
  34   std::regex re("asdf");
  35   std::string s("asdfasdfasdf");
  36   int i = 0;
  37   for (std::sregex_iterator it(s.begin(), s.end(), re);
  38        it != std::sregex_iterator();
  39        ++it, i++) {
  40       VERIFY( it->position() == 4 * i );
  41   }
  42 }
  43
  44 // PR libstdc++/64239
  45 void
  46 test02()
  47 {
  48   std::regex re("\\w+");
  49   std::string s("-a-b-c-");
  50
  51   std::tuple<int, int, const char*> expected[] =
  52   {
  53     std::make_tuple(1, 1, "a"),
  54     std::make_tuple(3, 1, "b"),
  55     std::make_tuple(5, 1, "c"),
  56   };
  57
  58   int i = 0;
  59   for (auto it1 = std::sregex_iterator(s.begin(), s.end(), re),
  60        end = std::sregex_iterator(); it1 != end; ++it1, i++)
  61     {
  62       auto it2 = it1;
  63       VERIFY(it1->position() == std::get<0>(expected[i]));
  64       VERIFY(it1->length() == std::get<1>(expected[i]));
  65       VERIFY(it1->str() == std::get<2>(expected[i]));
  66       VERIFY(it2->position() == std::get<0>(expected[i]));
  67       VERIFY(it2->length() == std::get<1>(expected[i]));
  68       VERIFY(it2->str() == std::get<2>(expected[i]));
  69     }
  70 }
  71
  72 void
  73 test03()
  74 {
  75   std::smatch m;
  76   std::string s = "abcde";
  77   std::regex_search(s, m, std::regex("bcd"));
  78   VERIFY(m.position() == 1);
  79   VERIFY(m.position() == m.prefix().length());
  80 }
  81
  82 int
  83 main()
  84 {
  85   test01();
  86   test02();
  87   test03();
  88   return 0;
  89 }