1 // { dg-options "-std=gnu++11" }
2 // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
3 //
4 // Copyright (C) 2005-2016 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 // 20.7.15 polymorphic function object wrapper
22 #include <functional>
23 #include <testsuite_hooks.h>
24 
25 using namespace __gnu_test;
26 
27 bool test __attribute__((unused)) = true;
28 
29 struct secret {};
30 
31 struct noncopyable_function_object_type
32 {
noncopyable_function_object_typenoncopyable_function_object_type33   noncopyable_function_object_type(secret) {}
34 
operator ()noncopyable_function_object_type35   int operator()() const { return 42; }
operator ()noncopyable_function_object_type36   int operator()()       { return 17; }
37 
38  private:
39   noncopyable_function_object_type();
40   noncopyable_function_object_type(const noncopyable_function_object_type&);
41   void operator=(const noncopyable_function_object_type&);
42 };
43 
44 // Put reference_wrappers into function<> wrappers
test06()45 void test06()
46 {
47   using std::function;
48   using std::ref;
49   using std::cref;
50 
51   secret password;
52   noncopyable_function_object_type x(password);
53 
54   function<int()> f(ref(x));
55   VERIFY( f );
56   VERIFY( f() == 17 );
57   VERIFY( f.target_type() == typeid(noncopyable_function_object_type) );
58   VERIFY( f.target<noncopyable_function_object_type>() == &x );
59 
60   function<int()> g = f;
61   VERIFY( g );
62   VERIFY( g() == 17 );
63   VERIFY( g.target_type() == typeid(noncopyable_function_object_type) );
64   VERIFY( g.target<noncopyable_function_object_type>() == &x );
65 
66   function<int()> h = cref(x);
67   VERIFY( h );
68   VERIFY( h() == 42 );
69   VERIFY( h.target_type() == typeid(noncopyable_function_object_type) );
70   VERIFY( h.target<const noncopyable_function_object_type>() == &x );
71   VERIFY( h.target<const noncopyable_function_object_type>() == &x );
72 
73   const function<int()>& hc = h;
74   VERIFY( h.target<noncopyable_function_object_type>() == 0 );
75   VERIFY( hc.target<noncopyable_function_object_type>() == &x );
76 }
77 
main()78 int main()
79 {
80   test06();
81   return 0;
82 }
83