text: //===----------------------------------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  
  // <regex>
  
  // template <class BidirectionalIterator> class sub_match;
  
  // template <class BiIter>
  //     bool
  //     operator==(const sub_match<BiIter>& lhs, const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator!=(const sub_match<BiIter>& lhs, const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator<(const sub_match<BiIter>& lhs, const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator<=(const sub_match<BiIter>& lhs, const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator>=(const sub_match<BiIter>& lhs, const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator>(const sub_match<BiIter>& lhs, const sub_match<BiIter>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool
  //     operator==(const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool
  //     operator!=(const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool
  //     operator<(const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& lhs,
  //               const sub_match<BiIter>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool
  //     operator>(const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& lhs,
  //               const sub_match<BiIter>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool operator>=(const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& lhs,
  //                     const sub_match<BiIter>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool
  //     operator<=(const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool
  //     operator==(const sub_match<BiIter>& lhs,
  //                const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool
  //     operator!=(const sub_match<BiIter>& lhs,
  //                const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool
  //     operator<(const sub_match<BiIter>& lhs,
  //               const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool operator>(const sub_match<BiIter>& lhs,
  //                    const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool
  //     operator>=(const sub_match<BiIter>& lhs,
  //                const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& rhs);
  //
  // template <class BiIter, class ST, class SA>
  //     bool
  //     operator<=(const sub_match<BiIter>& lhs,
  //                const basic_string<typename iterator_traits<BiIter>::value_type, ST, SA>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator==(typename iterator_traits<BiIter>::value_type const* lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator!=(typename iterator_traits<BiIter>::value_type const* lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator<(typename iterator_traits<BiIter>::value_type const* lhs,
  //               const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator>(typename iterator_traits<BiIter>::value_type const* lhs,
  //               const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator>=(typename iterator_traits<BiIter>::value_type const* lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator<=(typename iterator_traits<BiIter>::value_type const* lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator==(const sub_match<BiIter>& lhs,
  //                typename iterator_traits<BiIter>::value_type const* rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator!=(const sub_match<BiIter>& lhs,
  //                typename iterator_traits<BiIter>::value_type const* rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator<(const sub_match<BiIter>& lhs,
  //               typename iterator_traits<BiIter>::value_type const* rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator>(const sub_match<BiIter>& lhs,
  //               typename iterator_traits<BiIter>::value_type const* rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator>=(const sub_match<BiIter>& lhs,
  //                typename iterator_traits<BiIter>::value_type const* rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator<=(const sub_match<BiIter>& lhs,
  //                typename iterator_traits<BiIter>::value_type const* rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator==(typename iterator_traits<BiIter>::value_type const& lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator!=(typename iterator_traits<BiIter>::value_type const& lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator<(typename iterator_traits<BiIter>::value_type const& lhs,
  //               const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator>(typename iterator_traits<BiIter>::value_type const& lhs,
  //               const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator>=(typename iterator_traits<BiIter>::value_type const& lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator<=(typename iterator_traits<BiIter>::value_type const& lhs,
  //                const sub_match<BiIter>& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator==(const sub_match<BiIter>& lhs,
  //                typename iterator_traits<BiIter>::value_type const& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator!=(const sub_match<BiIter>& lhs,
  //                typename iterator_traits<BiIter>::value_type const& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator<(const sub_match<BiIter>& lhs,
  //               typename iterator_traits<BiIter>::value_type const& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator>(const sub_match<BiIter>& lhs,
  //               typename iterator_traits<BiIter>::value_type const& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator>=(const sub_match<BiIter>& lhs,
  //                typename iterator_traits<BiIter>::value_type const& rhs);
  //
  // template <class BiIter>
  //     bool
  //     operator<=(const sub_match<BiIter>& lhs,
  //                typename iterator_traits<BiIter>::value_type const& rhs);
  
  #include <regex>
  #include <cassert>
  #include "test_macros.h"
  
  template <class CharT>
  void
  test(const std::basic_string<CharT>& x, const std::basic_string<CharT>& y, bool doCStrTests = true)
  {
      typedef std::basic_string<CharT> string;
      typedef std::sub_match<typename string::const_iterator> sub_match;
      sub_match sm1;
      sm1.first = x.begin();
      sm1.second = x.end();
      sm1.matched = true;
      sub_match sm2;
      sm2.first = y.begin();
      sm2.second = y.end();
      sm2.matched = true;
      assert((sm1 == sm2) == (x == y));
      assert((sm1 != sm2) == (x != y));
      assert((sm1 < sm2) == (x < y));
      assert((sm1 > sm2) == (x > y));
      assert((sm1 <= sm2) == (x <= y));
      assert((sm1 >= sm2) == (x >= y));
      assert((x == sm2) == (x == y));
      assert((x != sm2) == (x != y));
      assert((x < sm2) == (x < y));
      assert((x > sm2) == (x > y));
      assert((x <= sm2) == (x <= y));
      assert((x >= sm2) == (x >= y));
      assert((sm1 == y) == (x == y));
      assert((sm1 != y) == (x != y));
      assert((sm1 < y) == (x < y));
      assert((sm1 > y) == (x > y));
      assert((sm1 <= y) == (x <= y));
      assert((sm1 >= y) == (x >= y));
      if (doCStrTests) {
          assert((x.c_str() == sm2) == (x == y));
          assert((x.c_str() != sm2) == (x != y));
          assert((x.c_str() < sm2) == (x < y));
          assert((x.c_str() > sm2) == (x > y));
          assert((x.c_str() <= sm2) == (x <= y));
          assert((x.c_str() >= sm2) == (x >= y));
          assert((sm1 == y.c_str()) == (x == y));
          assert((sm1 != y.c_str()) == (x != y));
          assert((sm1 < y.c_str()) == (x < y));
          assert((sm1 > y.c_str()) == (x > y));
          assert((sm1 <= y.c_str()) == (x <= y));
          assert((sm1 >= y.c_str()) == (x >= y));
          }
      assert((x[0] == sm2) == (string(1, x[0]) == y));
      assert((x[0] != sm2) == (string(1, x[0]) != y));
      assert((x[0] < sm2) == (string(1, x[0]) < y));
      assert((x[0] > sm2) == (string(1, x[0]) > y));
      assert((x[0] <= sm2) == (string(1, x[0]) <= y));
      assert((x[0] >= sm2) == (string(1, x[0]) >= y));
      assert((sm1 == y[0]) == (x == string(1, y[0])));
      assert((sm1 != y[0]) == (x != string(1, y[0])));
      assert((sm1 < y[0]) == (x < string(1, y[0])));
      assert((sm1 > y[0]) == (x > string(1, y[0])));
      assert((sm1 <= y[0]) == (x <= string(1, y[0])));
      assert((sm1 >= y[0]) == (x >= string(1, y[0])));
  }
  
  int main(int, char**)
  {
      test(std::string("123"), std::string("123"));
      test(std::string("1234"), std::string("123"));
      test(std::string("123\000" "56", 6), std::string("123\000" "56", 6), false);
  #ifndef TEST_HAS_NO_WIDE_CHARACTERS
      test(std::wstring(L"123"), std::wstring(L"123"));
      test(std::wstring(L"1234"), std::wstring(L"123"));
      test(std::wstring(L"123\000" L"56", 6), std::wstring(L"123\000" L"56", 6), false);
  #endif
  
    return 0;
  }
  