1// { dg-options "-std=gnu++11" }
2// { dg-do compile }
3
4// Copyright (C) 2012-2015 Free Software Foundation, Inc.
5//
6// This file is part of the GNU ISO C++ Library.  This library is free
7// software; you can redistribute it and/or modify it under the
8// terms of the GNU General Public License as published by the
9// Free Software Foundation; either version 3, or (at your option)
10// any later version.
11
12// This library is distributed in the hope that it will be useful,
13// but WITHOUT ANY WARRANTY; without even the implied warranty of
14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15// GNU General Public License for more details.
16
17// You should have received a copy of the GNU General Public License along
18// with this library; see the file COPYING3.  If not see
19// <http://www.gnu.org/licenses/>.
20
21// PR libstdc++/55463 Passing rvalue objects to std::mem_fn
22
23#include <functional>
24
25struct X
26{
27  int& func();
28  char& func_c() const;
29  short& func_v() volatile;
30  double& func_cv() const volatile;
31
32  int data;
33};
34
35struct Y : X { };
36
37using CX = const X;
38using CY = const Y;
39
40using X_ptr = X*;
41
42struct smart_ptr
43{
44  X& operator*() const;
45};
46
47std::reference_wrapper<X> ref();
48std::reference_wrapper<const X> cref();
49std::reference_wrapper<Y> yref();
50
51void test01()
52{
53  int& i1 __attribute__((unused)) = std::mem_fn( &X::func )( X() );
54  int& i2 __attribute__((unused)) = std::mem_fn( &X::func )( Y() );
55  int& i3 __attribute__((unused)) = std::mem_fn( &X::func )( ref() );
56  int& i4 __attribute__((unused)) = std::mem_fn( &X::func )( yref() );
57  int& i5 __attribute__((unused)) = std::mem_fn( &X::func )( X_ptr() );
58  int& i6 __attribute__((unused)) = std::mem_fn( &X::func )( smart_ptr() );
59
60  char& c1 __attribute__((unused)) = std::mem_fn( &X::func_c )( X() );
61  char& c2 __attribute__((unused)) = std::mem_fn( &X::func_c )( CX() );
62  char& c3 __attribute__((unused)) = std::mem_fn( &X::func_c )( Y() );
63  char& c4 __attribute__((unused)) = std::mem_fn( &X::func_c )( ref() );
64  char& c5 __attribute__((unused)) = std::mem_fn( &X::func_c )( cref() );
65  char& c6 __attribute__((unused)) = std::mem_fn( &X::func_c )( yref() );
66  char& c7 __attribute__((unused)) = std::mem_fn( &X::func_c )( X_ptr() );
67  char& c8 __attribute__((unused)) = std::mem_fn( &X::func_c )( smart_ptr() );
68
69  short& s1 __attribute__((unused)) = std::mem_fn( &X::func_v )( X() );
70  short& s2 __attribute__((unused)) = std::mem_fn( &X::func_v )( Y() );
71  short& s3 __attribute__((unused)) = std::mem_fn( &X::func_v )( ref() );
72  short& s4 __attribute__((unused)) = std::mem_fn( &X::func_v )( yref() );
73  short& s5 __attribute__((unused)) = std::mem_fn( &X::func_v )( X_ptr() );
74  short& s6 __attribute__((unused)) = std::mem_fn( &X::func_v )( smart_ptr() );
75
76  double& d1 __attribute__((unused)) = std::mem_fn( &X::func_cv )( X() );
77  double& d2 __attribute__((unused)) = std::mem_fn( &X::func_cv )( CX() );
78  double& d3 __attribute__((unused)) = std::mem_fn( &X::func_cv )( Y() );
79  double& d4 __attribute__((unused)) = std::mem_fn( &X::func_cv )( ref() );
80  double& d5 __attribute__((unused)) = std::mem_fn( &X::func_cv )( cref() );
81  double& d6 __attribute__((unused)) = std::mem_fn( &X::func_cv )( yref() );
82  double& d7 __attribute__((unused)) = std::mem_fn( &X::func_cv )( X_ptr() );
83  double& d8 __attribute__((unused))
84    = std::mem_fn( &X::func_cv )( smart_ptr() );
85
86  // [expr.mptr.oper]
87  // The result of a .* expression whose second operand is a pointer to a
88  // data member is of the same value category (3.10) as its first operand.
89  int&& rval __attribute__((unused)) = std::mem_fn( &X::data )( X() );
90  const int&& crval __attribute__((unused)) = std::mem_fn( &X::data )( CX() );
91  int&& yrval __attribute__((unused)) = std::mem_fn( &X::data )( Y() );
92  const int&& ycrval __attribute__((unused)) = std::mem_fn( &X::data )( CY() );
93
94  int& val __attribute__((unused)) = std::mem_fn( &X::data )( ref() );
95  const int& cval __attribute__((unused)) = std::mem_fn( &X::data )( cref() );
96  int& yval __attribute__((unused)) = std::mem_fn( &X::data )( yref() );
97
98  int& pval __attribute__((unused)) = std::mem_fn( &X::data )( X_ptr() );
99  int& sval __attribute__((unused)) = std::mem_fn( &X::data )( smart_ptr() );
100}
101
102void test02()
103{
104  std::reference_wrapper<X> r = ref();
105  X& x1 __attribute__((unused))
106    = std::mem_fn( &std::reference_wrapper<X>::get )( r );
107  const std::reference_wrapper<X> cr = ref();
108  const X& x3 __attribute__((unused))
109    = std::mem_fn( &std::reference_wrapper<X>::get )( cr );
110  X& x2 __attribute__((unused))
111    = std::mem_fn( &std::reference_wrapper<X>::get )( ref() );
112}
113