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finally.h
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finally.h
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// This file is part of VSTGUI. It is subject to the license terms
// in the LICENSE file found in the top-level directory of this
// distribution and at http://github.com/steinbergmedia/vstgui/LICENSE
#pragma once
#include "vstguifwd.h"
//------------------------------------------------------------------------
namespace VSTGUI {
//------------------------------------------------------------------------
template <typename Proc>
class FinalAction
{
public:
explicit FinalAction (Proc action) noexcept : action (std::move (action)) {}
FinalAction (FinalAction&& other) noexcept
{
action = std::move (other.action);
other.invoke = false;
}
FinalAction (const FinalAction&) = delete;
FinalAction& operator= (const FinalAction&) = delete;
FinalAction& operator= (FinalAction&&) = delete;
~FinalAction () noexcept
{
if (invoke)
action ();
}
private:
Proc action;
bool invoke {true};
};
//------------------------------------------------------------------------
template <class F>
auto finally (F&& f) noexcept
{
return FinalAction<typename std::remove_cv<typename std::remove_reference<F>::type>::type> (
std::forward<F> (f));
}
//------------------------------------------------------------------------
} // VSTGUI