blob: 082d229ccdd8d3957e2c83853126ac50cbe67905 [file] [log] [blame]
/*
* Copyright (C) 2017 Yusuke Suzuki <utatane.tea@gmail.com>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <type_traits>
namespace WTF {
template<typename Functor>
class RecursableLambda {
public:
explicit RecursableLambda(Functor&& functor)
: m_functor(std::forward<Functor>(functor))
{
}
template<typename... Args>
decltype(auto) operator()(Args&&... args) const
{
return m_functor(std::ref(*this), std::forward<Args>(args)...);
}
private:
Functor m_functor;
};
template<typename Functor>
decltype(auto) recursableLambda(Functor&& f)
{
return RecursableLambda<std::decay_t<Functor>>(std::forward<Functor>(f));
}
} // namespace WTF
using WTF::recursableLambda;