libstdc++-v3/testsuite/28_regex/algorithms/regex_match/ecma/char/emptygroup.cc

   1 // { dg-do run { target c++11 } }
   2
   3 //
   4 // 2013-09-02  Tim Shen <timshen91@gmail.com>
   5 //
   6 // Copyright (C) 2013-2016 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 // 28.11.2 regex_match
  24 // Tests ECMAScript empty-grouping against a C-string.
  25
  26 #include <regex>
  27 #include <testsuite_hooks.h>
  28 #include <testsuite_regex.h>
  29
  30 using namespace __gnu_test;
  31 using namespace std;
  32
  33 void
  34 test01()
  35 {
  36   bool test __attribute__((unused)) = true;
  37
  38   {
  39     regex re("()*\\1");
  40     cmatch m;
  41     const char s[] = "";
  42     VERIFY( regex_match_debug(s, m, re) );
  43     VERIFY( m.size() == 2 );
  44     VERIFY( m[0].matched );
  45     VERIFY( m[1].matched );
  46   }
  47   {
  48     regex re("()*");
  49     cmatch m;
  50     const char s[] = "";
  51     VERIFY( regex_match_debug(s, m, re) );
  52   }
  53   VERIFY(regex_match_debug("", regex("(?:)*")));
  54 }
  55
  56 int
  57 main()
  58 {
  59   test01();
  60   return 0;
  61 }