mirror of git://gcc.gnu.org/git/gcc.git
81 lines
2.4 KiB
C++
81 lines
2.4 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) 2005-2016 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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struct secret {};
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struct noncopyable_function_object_type
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{
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noncopyable_function_object_type(secret) {}
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int operator()() const { return 42; }
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int operator()() { return 17; }
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private:
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noncopyable_function_object_type();
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noncopyable_function_object_type(const noncopyable_function_object_type&);
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void operator=(const noncopyable_function_object_type&);
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};
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// Put reference_wrappers into function<> wrappers
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void test06()
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{
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using std::function;
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using std::ref;
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using std::cref;
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secret password;
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noncopyable_function_object_type x(password);
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function<int()> f(ref(x));
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VERIFY( f );
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VERIFY( f() == 17 );
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VERIFY( f.target_type() == typeid(noncopyable_function_object_type) );
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VERIFY( f.target<noncopyable_function_object_type>() == &x );
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function<int()> g = f;
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VERIFY( g );
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VERIFY( g() == 17 );
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VERIFY( g.target_type() == typeid(noncopyable_function_object_type) );
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VERIFY( g.target<noncopyable_function_object_type>() == &x );
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function<int()> h = cref(x);
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VERIFY( h );
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VERIFY( h() == 42 );
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VERIFY( h.target_type() == typeid(noncopyable_function_object_type) );
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VERIFY( h.target<const noncopyable_function_object_type>() == &x );
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VERIFY( h.target<const noncopyable_function_object_type>() == &x );
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const function<int()>& hc = h;
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VERIFY( h.target<noncopyable_function_object_type>() == 0 );
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VERIFY( hc.target<noncopyable_function_object_type>() == &x );
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}
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int main()
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{
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test06();
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return 0;
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}
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