1// 2005-01-26 Douglas Gregor <dgregor@cs.indiana.edu>
2//
3// Copyright (C) 2005-2015 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 3, 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 COPYING3.  If not see
18// <http://www.gnu.org/licenses/>.
19
20// 3.5 function template mem_fn
21#include <tr1/functional>
22#include <testsuite_hooks.h>
23#include <testsuite_tr1.h>
24
25struct X { int bar; };
26
27struct Y : X { };
28
29template<typename T>
30struct dumb_ptr
31{
32  dumb_ptr(T* p) : p(p) {}
33
34  T& operator*() const { return *p; }
35
36 private:
37  T* p;
38};
39
40// Test mem_fn with a data member
41void test01(int r = 0)
42{
43  using std::tr1::mem_fn;
44
45  X x;
46  Y y;
47  const X& xc = x;
48  const Y& yc = y;
49  X* xp = &x;
50  Y* yp =&y;
51  const X* xpc = xp;
52  const Y* ypc = yp;
53  dumb_ptr<X> xd(xp);
54  dumb_ptr<Y> yd(yp);
55  const dumb_ptr<X>& xdc = xd;
56  const dumb_ptr<Y>& ydc = yd;
57
58  int& bx = mem_fn(&X::bar)(x);
59  const int& bxc = mem_fn(&X::bar)(xc);
60  int& bxp = mem_fn(&X::bar)(xp);
61  const int& bxpc = mem_fn(&X::bar)(xpc);
62  const int& bxd = mem_fn(&X::bar)(xd);
63  const int& bxdc = mem_fn(&X::bar)(xdc);
64
65  int& by = mem_fn(&X::bar)(y);
66  const int& byc = mem_fn(&X::bar)(yc);
67  int& byp = mem_fn(&X::bar)(yp);
68  const int& bypc = mem_fn(&X::bar)(ypc);
69  const int& byd = mem_fn(&X::bar)(yd);
70  const int& bydc = mem_fn(&X::bar)(ydc);
71
72  // Avoid unused variable warnings.
73  r = bx + bxc + bxp + bxpc + bxd + bxdc + by + byc + byp + bypc + byd + bydc;
74}
75
76int main()
77{
78  test01();
79  return 0;
80}
81