1// 2005-01-26 Douglas Gregor <dgregor@cs.indiana.edu>
2//
3// Copyright (C) 2005 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 2, or (at your option)
9// any later version.
10//
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15//
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING.  If not, write to the Free
18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
19// USA.
20
21// 3.5 function template mem_fn
22#include <tr1/functional>
23#include <testsuite_hooks.h>
24#include <testsuite_tr1.h>
25
26struct X { int bar; };
27
28struct Y : X { };
29
30template<typename T>
31struct dumb_ptr
32{
33  dumb_ptr(T* p) : p(p) {}
34
35  T& operator*() const { return *p; }
36
37 private:
38  T* p;
39};
40
41// Test mem_fn with a data member
42void test01(int r = 0)
43{
44  using std::tr1::mem_fn;
45
46  X x;
47  Y y;
48  const X& xc = x;
49  const Y& yc = y;
50  X* xp = &x;
51  Y* yp =&y;
52  const X* xpc = xp;
53  const Y* ypc = yp;
54  dumb_ptr<X> xd(xp);
55  dumb_ptr<Y> yd(yp);
56  const dumb_ptr<X>& xdc = xd;
57  const dumb_ptr<Y>& ydc = yd;
58
59  int& bx = mem_fn(&X::bar)(x);
60  const int& bxc = mem_fn(&X::bar)(xc);
61  int& bxp = mem_fn(&X::bar)(xp);
62  const int& bxpc = mem_fn(&X::bar)(xpc);
63  const int& bxd = mem_fn(&X::bar)(xd);
64  const int& bxdc = mem_fn(&X::bar)(xdc);
65
66  int& by = mem_fn(&X::bar)(y);
67  const int& byc = mem_fn(&X::bar)(yc);
68  int& byp = mem_fn(&X::bar)(yp);
69  const int& bypc = mem_fn(&X::bar)(ypc);
70  const int& byd = mem_fn(&X::bar)(yd);
71  const int& bydc = mem_fn(&X::bar)(ydc);
72
73  // Avoid unused variable warnings.
74  r = bx + bxc + bxp + bxpc + bxd + bxdc + by + byc + byp + bypc + byd + bydc;
75}
76
77int main()
78{
79  test01();
80  return 0;
81}
82