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