#pragma once

template<typename T>
class ScopeExit
{
    T mFunc;

public:
    ScopeExit(T aFunc)
        : mFunc(aFunc)
    {
    }

    ~ScopeExit()
    {
        mFunc();
    }
};


template<typename F>
ScopeExit<F> onScopeExit(F f)
{
    return ScopeExit<F>(f);
};


#define __strcat2(s1, s2)   s1 ## s2
#define __strcat1(s1, s2)   __strcat2(s1, s2)


#define ON_SCOPE_EXIT(...)  \
    auto __strcat1(onExit, __LINE__) = onScopeExit( [&](void) {__VA_ARGS__} )