1 // { dg-options "-std=gnu++11" } 2 // 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu> 3 // 4 // Copyright (C) 2005-2016 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 26 using namespace __gnu_test; 27 28 bool test __attribute__((unused)) = true; 29 30 // Put reference_wrappers to function pointers into function<> wrappers test07()31void test07() 32 { 33 using std::function; 34 using std::ref; 35 using std::cref; 36 37 int (*fptr)(float) = truncate_float; 38 39 function<int(float)> f1(ref(fptr)); 40 VERIFY( f1 ); 41 VERIFY( !!f1 ); 42 VERIFY( !(f1 == 0) ); 43 VERIFY( !(0 == f1) ); 44 VERIFY( f1 != 0 ); 45 VERIFY( 0 != f1 ); 46 47 // Invocation 48 VERIFY( f1(3.1f) == 3 ); 49 50 // target_type and target() functions 51 const function<int(float)>& f1c = f1; 52 VERIFY( typeid(int(*)(float)) == f1.target_type() ); 53 VERIFY( f1.target<int(*)(float)>() != 0 ); 54 VERIFY( f1.target<int(*)(float)>() == &fptr ); 55 VERIFY( f1c.target<int(*)(float)>() != 0 ); 56 VERIFY( f1c.target<int(*)(float)>() == &fptr ); 57 58 function<int(float)> f2(cref(fptr)); 59 VERIFY( f2 ); 60 VERIFY( !!f2 ); 61 VERIFY( !(f2 == 0) ); 62 VERIFY( !(0 == f2) ); 63 VERIFY( f2 != 0 ); 64 VERIFY( 0 != f2 ); 65 66 // Invocation 67 VERIFY( f2(3.1f) == 3 ); 68 69 // target_type and target() functions 70 const function<int(float)>& f2c = f2; 71 VERIFY( typeid(int(*)(float)) == f2.target_type() ); 72 VERIFY( f2.target<int(*)(float)>() == 0 ); 73 VERIFY( f2.target<int(* const)(float)>() == &fptr ); 74 VERIFY( f2c.target<int(*)(float)>() != 0 ); 75 VERIFY( f2c.target<int(*)(float)>() == &fptr ); 76 } 77 main()78int main() 79 { 80 test07(); 81 return 0; 82 } 83