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// 2005-01-26 Douglas Gregor <dgregor@cs.indiana.edu>

//

// Copyright (C) 2005 Free Software Foundation, Inc.

//

// 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.

// 3.5 function template mem_fn

#include <tr1/functional>

#include <testsuite_hooks.h>

#include <testsuite_tr1.h>

struct X { int bar; };

struct Y : X { };

template<typename T>

struct dumb_ptr

{

  dumb_ptr(T* p) : p(p) {}

  T& operator*() const { return *p; }

 private:

  T* p;

};

// Test mem_fn with a data member

void test01(int r = 0)

{

  using std::tr1::mem_fn;

  X x;

  Y y;

  const X& xc = x;

  const Y& yc = y;

  X* xp = &x;

  Y* yp =&y;

  const X* xpc = xp;

  const Y* ypc = yp;

  dumb_ptr<X> xd(xp);

  dumb_ptr<Y> yd(yp);

  const dumb_ptr<X>& xdc = xd;

  const dumb_ptr<Y>& ydc = yd;

  int& bx = mem_fn(&X::bar)(x);

  const int& bxc = mem_fn(&X::bar)(xc);

  int& bxp = mem_fn(&X::bar)(xp);

  const int& bxpc = mem_fn(&X::bar)(xpc);

  const int& bxd = mem_fn(&X::bar)(xd);

  const int& bxdc = mem_fn(&X::bar)(xdc);

  int& by = mem_fn(&X::bar)(y);

  const int& byc = mem_fn(&X::bar)(yc);

  int& byp = mem_fn(&X::bar)(yp);

  const int& bypc = mem_fn(&X::bar)(ypc);

  const int& byd = mem_fn(&X::bar)(yd);

  const int& bydc = mem_fn(&X::bar)(ydc);

  // Avoid unused variable warnings.

  r = bx + bxc + bxp + bxpc + bxd + bxdc + by + byc + byp + bypc + byd + bydc;

}

int main()

{

  test01();

  return 0;

}