text: //===----------------------------------------------------------------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is dual licensed under the MIT and the University of Illinois Open
  // Source Licenses. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  
  // <regex>
  
  // template <class charT, class traits = regex_traits<charT>> class basic_regex;
  
  // basic_regex& operator=(const charT* ptr);
  
  #include <regex>
  #include <cassert>
  #include "test_macros.h"
  
  int main()
  {
      std::regex r2;
      r2 = "(a([bc]))";
      assert(r2.flags() == std::regex::ECMAScript);
      assert(r2.mark_count() == 2);
  }
  