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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/20_util/function/2.cc
1 // { dg-do run { target c++11 } }
2 // { dg-require-effective-target hosted }
4 // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
6 // Copyright (C) 2005-2023 Free Software Foundation, Inc.
8 // This file is part of the GNU ISO C++ Library. This library is free
9 // software; you can redistribute it and/or modify it under the
10 // terms of the GNU General Public License as published by the
11 // Free Software Foundation; either version 3, or (at your option)
14 // This library is distributed in the hope that it will be useful,
15 // but WITHOUT ANY WARRANTY; without even the implied warranty of
16 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 // GNU General Public License for more details.
19 // You should have received a copy of the GNU General Public License along
20 // with this library; see the file COPYING3. If not see
21 // <http://www.gnu.org/licenses/>.
23 // 20.7.15 polymorphic function object wrapper
25 #include <testsuite_hooks.h>
26 #include <testsuite_tr1.h>
28 using namespace __gnu_test
;
30 // Put function pointers into function<> wrappers
35 function
<int(float)> f1(truncate_float
);
44 function
<int(float)> f2(f1
);
48 VERIFY( f1(3.1f
) == 3 );
49 VERIFY( f2(3.1f
) == 3 );
59 VERIFY( f1(3.1f
) == 3 );
61 // Assignment from a function pointer
63 VERIFY( f2(3.1f
) == 3 );
65 // target_type and target() functions
66 const function
<int(float)>& f1c
= f1
;
68 VERIFY( typeid(int(*)(float)) == f1
.target_type() );
70 VERIFY( f2
.target
<int(*)(float)>() != 0 );
71 VERIFY( *f2
.target
<int(*)(float)>() == &truncate_float
);
72 VERIFY( f1c
.target
<int(*)(float)>() != 0 );
73 VERIFY( *f1c
.target
<int(*)(float)>() == &truncate_float
);