mirror of git://gcc.gnu.org/git/gcc.git
93 lines
2.1 KiB
C++
93 lines
2.1 KiB
C++
// { dg-do run { target c++11 } }
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// 2005-01-15 Douglas Gregor <dgregor@cs.indiana.edu>
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//
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// Copyright (C) 2005-2019 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// 20.7.15 polymorphic function object wrapper
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#include <functional>
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#include <testsuite_hooks.h>
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using namespace __gnu_test;
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// Operations on empty function<> objects
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void test01()
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{
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using std::function;
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using std::bad_function_call;
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// Default-construction
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function<int(float)> f1;
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VERIFY( ((bool)f1 == false) );
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VERIFY( !f1 );
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VERIFY( f1 == 0 );
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VERIFY( 0 == f1 );
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VERIFY( !(f1 != 0) );
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VERIFY( !(0 != f1) );
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// Copy-construction
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function<int(float)> f2(f1);
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VERIFY( !f2 );
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// Construct with NULL pointer
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function<int(float)> f3(0);
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VERIFY( !f3 );
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// Assignment
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f1 = f2;
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VERIFY( !f1);
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// Assignment to NULL pointer
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f1 = 0;
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VERIFY( !f1 );
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// Swap
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swap(f1, f2);
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VERIFY( !f1 );
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VERIFY( !f2 );
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// Invocation should throw bad_function_call
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bool thrown = false;
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try
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{
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f1(3.14159f);
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VERIFY( false );
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}
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catch (bad_function_call)
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{
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thrown = true;
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}
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VERIFY( thrown );
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// target_type returns typeid(void)
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VERIFY( f1.target_type() == typeid(void) );
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// target() always returns a NULL pointer
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VERIFY( f1.target<int (*)(float)>() == 0);
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// Check const version
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const function<int(float)>& f1c = f1;
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VERIFY( f1c.target<int (*)(float)>() == 0 );
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VERIFY( !f1c );
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}
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int main()
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{
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test01();
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return 0;
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}
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