blob: 65eef78d1c4557bea0f9f241fc25d0282006c726 [file] [log] [blame]
// { dg-do run { target c++11 } }
// 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
//
// Copyright (C) 2005-2022 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
// <http://www.gnu.org/licenses/>.
// 20.7.15 polymorphic function object wrapper
#include <functional>
#include <testsuite_hooks.h>
using namespace __gnu_test;
// Operations on empty function<> objects
void test01()
{
using std::function;
using std::bad_function_call;
// Default-construction
function<int(float)> f1;
VERIFY( ((bool)f1 == false) );
VERIFY( !f1 );
VERIFY( f1 == 0 );
VERIFY( 0 == f1 );
VERIFY( !(f1 != 0) );
VERIFY( !(0 != f1) );
// Copy-construction
function<int(float)> f2(f1);
VERIFY( !f2 );
// Construct with NULL pointer
function<int(float)> 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 (const 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<int (*)(float)>() == 0);
// Check const version
const function<int(float)>& f1c = f1;
VERIFY( f1c.target<int (*)(float)>() == 0 );
VERIFY( !f1c );
}
int main()
{
test01();
return 0;
}