// { dg-do run { target c++11 } } // 2005-01-15 Douglas Gregor // // Copyright (C) 2005-2018 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING3. If not see // . // 20.7.15 polymorphic function object wrapper #include #include #include using namespace __gnu_test; // Put function pointers into function<> wrappers void test02() { using std::function; function f1(truncate_float); VERIFY( f1 ); VERIFY( !!f1 ); VERIFY( !(f1 == 0) ); VERIFY( !(0 == f1) ); VERIFY( f1 != 0 ); VERIFY( 0 != f1 ); // Copy-construction function f2(f1); VERIFY( f2 ); // Invocation VERIFY( f1(3.1f) == 3 ); VERIFY( f2(3.1f) == 3 ); // Assignment to zero f1 = 0; VERIFY( !f1 ); // Swap f1.swap(f2); VERIFY( f1 ); VERIFY( !f2 ); VERIFY( f1(3.1f) == 3 ); // Assignment from a function pointer f2 = truncate_float; VERIFY( f2(3.1f) == 3 ); // target_type and target() functions const function& f1c = f1; VERIFY( typeid(int(*)(float)) == f1.target_type() ); VERIFY( f2.target() != 0 ); VERIFY( *f2.target() == &truncate_float ); VERIFY( f1c.target() != 0 ); VERIFY( *f1c.target() == &truncate_float ); } int main() { test02(); return 0; }