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

   1 // { dg-do run { target c++11 } }
   2
   3 //
   4 // 2013-07-25  Tim Shen <timshen91@gmail.com>
   5 //
   6 // Copyright (C) 2013-2019 Free Software Foundation, Inc.
   7 //
   8 // This file is part of the GNU ISO C++ Library.  This library is free
   9 // software; you can redistribute it and/or modify it under the
  10 // terms of the GNU General Public License as published by the
  11 // Free Software Foundation; either version 3, or (at your option)
  12 // any later version.
  13 //
  14 // This library is distributed in the hope that it will be useful,
  15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 // GNU General Public License for more details.
  18 //
  19 // You should have received a copy of the GNU General Public License along
  20 // with this library; see the file COPYING3.  If not see
  21 // <http://www.gnu.org/licenses/>.
  22
  23 // 28.12.1 regex_iterator
  24 // Tests iter->position() behavior
  25
  26 #include <regex>
  27 #include <tuple>
  28 #include <testsuite_hooks.h>
  29
  30 void
  31 test01()
  32 {
  33   std::regex re("asdf");
  34   std::string s("asdfasdfasdf");
  35   int i = 0;
  36   for (std::sregex_iterator it(s.begin(), s.end(), re);
  37        it != std::sregex_iterator();
  38        ++it, i++) {
  39       VERIFY( it->position() == 4 * i );
  40   }
  41 }
  42
  43 // PR libstdc++/64239
  44 void
  45 test02()
  46 {
  47   std::regex re("\\w+");
  48   std::string s("-a-b-c-");
  49
  50   std::tuple<int, int, const char*> expected[] =
  51   {
  52     std::make_tuple(1, 1, "a"),
  53     std::make_tuple(3, 1, "b"),
  54     std::make_tuple(5, 1, "c"),
  55   };
  56
  57   int i = 0;
  58   for (auto it1 = std::sregex_iterator(s.begin(), s.end(), re),
  59        end = std::sregex_iterator(); it1 != end; ++it1, i++)
  60     {
  61       auto it2 = it1;
  62       VERIFY(it1->position() == std::get<0>(expected[i]));
  63       VERIFY(it1->length() == std::get<1>(expected[i]));
  64       VERIFY(it1->str() == std::get<2>(expected[i]));
  65       VERIFY(it2->position() == std::get<0>(expected[i]));
  66       VERIFY(it2->length() == std::get<1>(expected[i]));
  67       VERIFY(it2->str() == std::get<2>(expected[i]));
  68     }
  69 }
  70
  71 void
  72 test03()
  73 {
  74   std::smatch m;
  75   std::string s = "abcde";
  76   std::regex_search(s, m, std::regex("bcd"));
  77   VERIFY(m.position() == 1);
  78   VERIFY(m.position() == m.prefix().length());
  79 }
  80
  81 int
  82 main()
  83 {
  84   test01();
  85   test02();
  86   test03();
  87   return 0;
  88 }