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52066eae | 1 | // { dg-do run { target c++11 } } |
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2 | // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu> |
3 | // | |
7adcbafe | 4 | // Copyright (C) 2005-2022 Free Software Foundation, Inc. |
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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 | // 20.7.15 polymorphic function object wrapper | |
22 | #include <functional> | |
23 | #include <testsuite_hooks.h> | |
24 | #include <testsuite_tr1.h> | |
25 | ||
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26 | template<typename T> |
27 | const T& | |
28 | as_const(T& t) | |
29 | { return t; } | |
30 | ||
31 | // Check that f's target is a reference_wrapper bound to obj. | |
32 | template<typename Function, typename T> | |
33 | bool | |
34 | wraps(Function& f, T& obj) | |
35 | { | |
36 | using ref_wrapper_type = std::reference_wrapper<T>; | |
37 | auto* p = f.template target<ref_wrapper_type>(); | |
38 | return std::addressof(p->get()) == std::addressof(obj); | |
39 | } | |
7aec2c63 | 40 | |
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41 | // Put reference_wrappers to member pointers |
42 | void test08() | |
43 | { | |
44 | using std::function; | |
45 | using std::ref; | |
46 | using std::cref; | |
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47 | using std::reference_wrapper; |
48 | using __gnu_test::X; | |
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49 | |
50 | int X::* X_bar = &X::bar; | |
51 | int (X::* X_foo)() = &X::foo; | |
52 | int (X::* X_foo_c)() const = &X::foo_c; | |
53 | int (X::* X_foo_v)() volatile = &X::foo_v; | |
54 | int (X::* X_foo_cv)() const volatile = &X::foo_cv; | |
55 | ||
56 | X x; | |
57 | x.bar = 17; | |
58 | ||
59 | function<int(X&)> frm(ref(X_bar)); | |
60 | VERIFY( frm ); | |
61 | VERIFY( frm(x) == 17 ); | |
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62 | VERIFY( typeid(ref(X_bar)) == frm.target_type() ); |
63 | VERIFY( wraps(frm, X_bar) ); | |
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64 | |
65 | function<int(X&)> fr(ref(X_foo)); | |
66 | VERIFY( fr ); | |
67 | VERIFY( fr(x) == 1 ); | |
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68 | VERIFY( typeid(ref(X_foo)) == fr.target_type() ); |
69 | VERIFY( wraps(fr, X_foo) ); | |
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70 | |
71 | function<int(const X&)> frc(ref(X_foo_c)); | |
72 | VERIFY( frc ); | |
73 | VERIFY( frc(x) == 2 ); | |
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74 | VERIFY( typeid(ref(X_foo_c)) == frc.target_type() ); |
75 | VERIFY( wraps(frc, X_foo_c) ); | |
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76 | |
77 | function<int(volatile X&)> frv(ref(X_foo_v)); | |
78 | VERIFY( frv ); | |
79 | VERIFY( frv(x) == 3 ); | |
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80 | VERIFY( typeid(ref(X_foo_v)) == frv.target_type() ); |
81 | VERIFY( wraps(frv, X_foo_v) ); | |
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82 | |
83 | function<int(const volatile X&)> frcv(ref(X_foo_cv)); | |
84 | VERIFY( frcv ); | |
85 | VERIFY( frcv(x) == 4 ); | |
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86 | VERIFY( typeid(ref(X_foo_cv)) == frcv.target_type() ); |
87 | VERIFY( wraps(frcv, X_foo_cv) ); | |
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88 | |
89 | function<int(X*)> grm(ref(X_bar)); | |
90 | VERIFY( grm ); | |
91 | VERIFY( grm(&x) == 17 ); | |
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92 | VERIFY( typeid(ref(X_bar)) == grm.target_type() ); |
93 | VERIFY( wraps(grm, X_bar) ); | |
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94 | |
95 | function<int(X*)> gr(ref(X_foo)); | |
96 | VERIFY( gr ); | |
97 | VERIFY( gr(&x) == 1 ); | |
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98 | VERIFY( typeid(ref(X_foo)) == gr.target_type() ); |
99 | VERIFY( wraps(gr, X_foo) ); | |
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100 | |
101 | function<int(const X*)> grc(ref(X_foo_c)); | |
102 | VERIFY( grc ); | |
103 | VERIFY( grc(&x) == 2 ); | |
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104 | VERIFY( typeid(ref(X_foo_c)) == grc.target_type() ); |
105 | VERIFY( wraps(grc, X_foo_c) ); | |
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106 | |
107 | function<int(volatile X*)> grv(ref(X_foo_v)); | |
108 | VERIFY( grv ); | |
109 | VERIFY( grv(&x) == 3 ); | |
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110 | VERIFY( typeid(ref(X_foo_v)) == grv.target_type() ); |
111 | VERIFY( wraps(grv, X_foo_v) ); | |
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112 | |
113 | function<int(const volatile X*)> grcv(ref(X_foo_cv)); | |
114 | VERIFY( grcv ); | |
115 | VERIFY( grcv(&x) == 4 ); | |
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116 | VERIFY( typeid(ref(X_foo_cv)) == grcv.target_type() ); |
117 | VERIFY( wraps(grcv, X_foo_cv) ); | |
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118 | |
119 | function<int(X&)> hrm(cref(X_bar)); | |
120 | VERIFY( hrm ); | |
121 | VERIFY( hrm(x) == 17 ); | |
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122 | VERIFY( typeid(cref(X_bar)) == hrm.target_type() ); |
123 | VERIFY( wraps(hrm, as_const(X_bar)) ); | |
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124 | |
125 | function<int(X&)> hr(cref(X_foo)); | |
126 | VERIFY( hr ); | |
127 | VERIFY( hr(x) == 1 ); | |
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128 | VERIFY( typeid(cref(X_foo)) == hr.target_type() ); |
129 | VERIFY( wraps(hr, as_const(X_foo)) ); | |
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130 | |
131 | function<int(const X&)> hrc(cref(X_foo_c)); | |
132 | VERIFY( hrc ); | |
133 | VERIFY( hrc(x) == 2 ); | |
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134 | VERIFY( typeid(cref(X_foo_c)) == hrc.target_type() ); |
135 | VERIFY( wraps(hrc, as_const(X_foo_c)) ); | |
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136 | |
137 | function<int(volatile X&)> hrv(cref(X_foo_v)); | |
138 | VERIFY( hrv ); | |
139 | VERIFY( hrv(x) == 3 ); | |
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140 | VERIFY( typeid(cref(X_foo_v)) == hrv.target_type() ); |
141 | VERIFY( wraps(hrv, as_const(X_foo_v)) ); | |
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142 | |
143 | function<int(const volatile X&)> hrcv(cref(X_foo_cv)); | |
144 | VERIFY( hrcv ); | |
145 | VERIFY( hrcv(x) == 4 ); | |
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146 | VERIFY( typeid(cref(X_foo_cv)) == hrcv.target_type() ); |
147 | VERIFY( wraps(hrcv, as_const(X_foo_cv)) ); | |
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148 | } |
149 | ||
150 | int main() | |
151 | { | |
152 | test08(); | |
153 | return 0; | |
154 | } |