// { dg-do run { target c++11 } } // 2005-01-15 Douglas Gregor // // Copyright (C) 2005-2017 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 using namespace __gnu_test; // Operations on empty function<> objects void test01() { using std::function; using std::bad_function_call; // Default-construction function f1; VERIFY( ((bool)f1 == false) ); VERIFY( !f1 ); VERIFY( f1 == 0 ); VERIFY( 0 == f1 ); VERIFY( !(f1 != 0) ); VERIFY( !(0 != f1) ); // Copy-construction function f2(f1); VERIFY( !f2 ); // Construct with NULL pointer function f3(0); VERIFY( !f3 ); // Assignment f1 = f2; VERIFY( !f1); // Assignment to NULL pointer f1 = 0; VERIFY( !f1 ); // Swap swap(f1, f2); VERIFY( !f1 ); VERIFY( !f2 ); // Invocation should throw bad_function_call bool thrown = false; try { f1(3.14159f); VERIFY( false ); } catch (bad_function_call) { thrown = true; } VERIFY( thrown ); // target_type returns typeid(void) VERIFY( f1.target_type() == typeid(void) ); // target() always returns a NULL pointer VERIFY( f1.target() == 0); // Check const version const function& f1c = f1; VERIFY( f1c.target() == 0 ); VERIFY( !f1c ); } int main() { test01(); return 0; }