1// 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
2//
3// Copyright (C) 2005-2015 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
25using namespace __gnu_test;
26
27bool test __attribute__((unused)) = true;
28
29// Put function pointers into function<> wrappers
30void test02()
31{
32  using std::tr1::function;
33
34  function<int(float)> f1(truncate_float);
35  VERIFY( f1 );
36  VERIFY( !!f1 );
37  VERIFY( !(f1 == 0) );
38  VERIFY( !(0 == f1) );
39  VERIFY( f1 != 0 );
40  VERIFY( 0 != f1 );
41
42  // Copy-construction
43  function<int(float)> f2(f1);
44  VERIFY( f2 );
45
46  // Invocation
47  VERIFY( f1(3.1f) == 3 );
48  VERIFY( f2(3.1f) == 3 );
49
50  // Assignment to zero
51  f1 = 0;
52  VERIFY( !f1 );
53
54  // Swap
55  f1.swap(f2);
56  VERIFY( f1 );
57  VERIFY( !f2 );
58  VERIFY( f1(3.1f) == 3 );
59
60  // Assignment from a function pointer
61  f2 = truncate_float;
62  VERIFY( f2(3.1f) == 3 );
63
64  // target_type and target() functions
65  const function<int(float)>& f1c = f1;
66  VERIFY( typeid(int(*)(float)) == f1.target_type() );
67  VERIFY( f2.target<int(*)(float)>() != 0 );
68  VERIFY( *f2.target<int(*)(float)>() == &truncate_float );
69  VERIFY( f1c.target<int(*)(float)>() != 0 );
70  VERIFY( *f1c.target<int(*)(float)>() == &truncate_float );
71}
72
73int main()
74{
75  test02();
76  return 0;
77}
78