Finally.h

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#pragma once
 
 
#include "common/Assert.h"
#include "common/Traits.h"
 
NAMESPACE_SPH_BEGIN
 
template <typename TFunctor>
class Finally {
private:
    TFunctor functor;
    bool moved = false;
 
public:
    Finally(TFunctor&& functor)
        : functor(std::forward<TFunctor>(functor)) {}
 
    Finally(Finally&& other)
        : functor(std::move(other.functor)) {
        other.moved = true;
    }
 
    ~Finally() {
        if (!moved) {
            functor();
        }
    }
};
 
template <typename TFunctor>
Finally<std::decay_t<TFunctor>> finally(TFunctor&& functor) {
    return Finally<std::decay_t<TFunctor>>(std::forward<TFunctor>(functor));
}
 
 
NAMESPACE_SPH_END