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1 | // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu> | |
2 | // | |
3 | // Copyright (C) 2005-2020 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 | // 3.7.2 polymorphic function object wrapper | |
21 | #include <tr1/functional> | |
22 | #include <testsuite_hooks.h> | |
23 | #include <testsuite_tr1.h> | |
24 | ||
25 | using namespace __gnu_test; | |
26 | ||
27 | struct secret {}; | |
28 | ||
29 | struct noncopyable_function_object_type | |
30 | { | |
31 | noncopyable_function_object_type(secret) {} | |
32 | ||
33 | int operator()() const { return 42; } | |
34 | int operator()() { return 17; } | |
35 | ||
36 | private: | |
37 | noncopyable_function_object_type(); | |
38 | noncopyable_function_object_type(const noncopyable_function_object_type&); | |
39 | void operator=(const noncopyable_function_object_type&); | |
40 | }; | |
41 | ||
42 | // Put reference_wrappers into function<> wrappers | |
43 | void test06() | |
44 | { | |
45 | using std::tr1::function; | |
46 | using std::tr1::ref; | |
47 | using std::tr1::cref; | |
48 | ||
49 | secret password; | |
50 | noncopyable_function_object_type x(password); | |
51 | ||
52 | function<int()> f(ref(x)); | |
53 | VERIFY( f ); | |
54 | VERIFY( f() == 17 ); | |
55 | VERIFY( f.target_type() == typeid(noncopyable_function_object_type) ); | |
56 | VERIFY( f.target<noncopyable_function_object_type>() == &x ); | |
57 | ||
58 | function<int()> g = f; | |
59 | VERIFY( g ); | |
60 | VERIFY( g() == 17 ); | |
61 | VERIFY( g.target_type() == typeid(noncopyable_function_object_type) ); | |
62 | VERIFY( g.target<noncopyable_function_object_type>() == &x ); | |
63 | ||
64 | function<int()> h = cref(x); | |
65 | VERIFY( h ); | |
66 | VERIFY( h() == 42 ); | |
67 | VERIFY( h.target_type() == typeid(noncopyable_function_object_type) ); | |
68 | VERIFY( h.target<const noncopyable_function_object_type>() == &x ); | |
69 | VERIFY( h.target<const noncopyable_function_object_type>() == &x ); | |
70 | ||
71 | const function<int()>& hc = h; | |
72 | VERIFY( h.target<noncopyable_function_object_type>() == 0 ); | |
73 | VERIFY( hc.target<noncopyable_function_object_type>() == &x ); | |
74 | } | |
75 | ||
76 | int main() | |
77 | { | |
78 | test06(); | |
79 | return 0; | |
80 | } |