1// { dg-options "-std=gnu++0x" }
2// 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
3//
4// Copyright (C) 2005, 2009 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#include <testsuite_tr1.h>
25
26using namespace __gnu_test;
27
28bool test __attribute__((unused)) = true;
29
30// Put nearly-matching function pointers into function<> wrappers
31void test03()
32{
33  using std::function;
34
35  function<int(float)> f1(truncate_double);
36  VERIFY( f1 );
37  VERIFY( !!f1 );
38  VERIFY( !(f1 == 0) );
39  VERIFY( !(0 == f1) );
40  VERIFY( f1 != 0 );
41  VERIFY( 0 != f1 );
42
43  // Copy-construction
44  function<int(float)> f2(f1);
45  VERIFY( f2 );
46
47  // Invocation
48  VERIFY( f1(3.1f) == 3 );
49  VERIFY( f2(3.1f) == 3 );
50
51  // Assignment to zero
52  f1 = 0;
53  VERIFY( !f1 );
54
55  // Swap
56  f1.swap(f2);
57  VERIFY( f1 );
58  VERIFY( !f2 );
59  VERIFY( f1(3.1f) == 3 );
60
61  // Assignment from a function pointer
62  f2 = truncate_double;
63  VERIFY( f2(3.1f) == 3 );
64
65  // target_type and target() functions
66  const function<int(float)>& f1c = f1;
67  VERIFY( typeid(long(*)(double)) == f1.target_type() );
68  VERIFY( f2.target<long(*)(double)>() != 0 );
69  VERIFY( *f2.target<long(*)(double)>() == &truncate_double );
70  VERIFY( f1c.target<long(*)(double)>() != 0 );
71  VERIFY( *f1c.target<long(*)(double)>() == &truncate_double );
72}
73
74int main()
75{
76  test03();
77  return 0;
78}
79