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// 2000-09-11 Benjamin Kosnik <bkoz@redhat.com>

// Copyright (C) 2000, 2001, 2002, 2003 Free Software Foundation

//

// This file is part of the GNU ISO C++ Library.  This library is free

// software; you can redistribute it and/or modify it under the

// terms of the GNU General Public License as published by the

// Free Software Foundation; either version 2, or (at your option)

// any later version.

// This library is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along

// with this library; see the file COPYING.  If not, write to the Free

// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,

// USA.

// 22.1.1.4 locale operators [lib.locale.operators]

#include <cwchar> // for mbstate_t

#include <locale>

#include <testsuite_hooks.h>

// bool operator()(const string_type&, const string_type&) const

long gnu_count;

class gnu_collate: public std::collate<char>

{

protected:

  virtual int

  do_compare(const char*, const char*, const char*, const char*) const

  { ++gnu_count; return 0; }

};

void test02()

{

  using namespace std;

  bool test __attribute__((unused)) = true;

  // Sanity check.

  locale loc_c = locale::classic();

  string s01("land of ");

  string s02("land of look behind");

  VERIFY( !loc_c(s01, s01) );

  VERIFY( loc_c(s01, s02) );

  // Derivation, MF check.

  locale loc_gnu(loc_c, new gnu_collate);

  gnu_count = 0;

  loc_gnu(s01, s02);

  VERIFY( gnu_count == 1 );

}

int main ()

{

  test02();

  return 0;

}