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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/tr1/3_function_objects/function/2.cc
1 // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
3 // Copyright (C) 2005-2019 Free Software Foundation, Inc.
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)
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.
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/>.
20 // 3.7.2 polymorphic function object wrapper
21 #include <tr1/functional>
22 #include <testsuite_hooks.h>
23 #include <testsuite_tr1.h>
25 using namespace __gnu_test
;
27 // Put function pointers into function<> wrappers
30 using std::tr1::function
;
32 function
<int(float)> f1(truncate_float
);
41 function
<int(float)> f2(f1
);
45 VERIFY( f1(3.1f
) == 3 );
46 VERIFY( f2(3.1f
) == 3 );
56 VERIFY( f1(3.1f
) == 3 );
58 // Assignment from a function pointer
60 VERIFY( f2(3.1f
) == 3 );
62 // target_type and target() functions
63 const function
<int(float)>& f1c
= f1
;
64 VERIFY( typeid(int(*)(float)) == f1
.target_type() );
65 VERIFY( f2
.target
<int(*)(float)>() != 0 );
66 VERIFY( *f2
.target
<int(*)(float)>() == &truncate_float
);
67 VERIFY( f1c
.target
<int(*)(float)>() != 0 );
68 VERIFY( *f1c
.target
<int(*)(float)>() == &truncate_float
);