Scope guarding, C++ (gcc)

Scope guarding

//Title of this code

#include <iostream>
#include <vector>

template<class Fun>
class ScopeGuard
{
private:
    Fun f_;
    bool active_;
    
private:
    ScopeGuard(const ScopeGuard &);
    ScopeGuard & operator = (const ScopeGuard &);
    
public:
    ScopeGuard(Fun f) : f_(std::move(f)), active_(true)
    {
    }
    
    ScopeGuard(ScopeGuard &&other) : f_(std::move(other.f_)), active_(other.active_)
    {
        other.dismiss();
    }
    
    ~ScopeGuard()
    {
        if (active_)
        {
            f_();
        }
    }
    
    void dismiss()
    {
        active_ = false;
    }
};
    
template<class Fun>
ScopeGuard<Fun> scope_guard(Fun f)
{
    return ScopeGuard<Fun>(std::move(f));
}

#define CONCATENATE_IMPL(a, b) a##b
#define CONCATENATE(a, b) CONCATENATE_IMPL(a, b)
#define ANONYMOUS CONCATENATE(_, __LINE__)

#define SCOPE_EXIT(code) auto ANONYMOUS = scope_guard([&]code);

#define DEFINE_ROLLBACK(name, code) auto name = scope_guard([&]code);
#define DISMISS_ROLLBACK(name) name.dismiss()

void add_element(std::vector<int*> &v, int val)
{
    int *p = new int(val);
    DEFINE_ROLLBACK(free_p, {std::cout<<"Freeing p...\n"; free(p);});
    
    //throw "r";
    
    v.push_back(p);
    
    DEFINE_ROLLBACK(r, {std::cout<<"Removing inserted element...\n"; v.pop_back();});
    
    //throw "r";
    
    DISMISS_ROLLBACK(r);
    DISMISS_ROLLBACK(free_p);
}

int main()
{
    std::vector<int*> ints;
    
    SCOPE_EXIT(
        {
            std::cout<<"Freeing "<<ints.size()<<" elements...\n";
            
            for(const auto &i : ints)
            {
                free(i);
            }
        });
        
    try
    {
        add_element(ints, 3);        
    }
    catch(...)
    {
    }
    
    for(const auto &i : ints)
    {
        std::cout<<*i<<" ";
    }
    
    std::cout<<'\n';
}


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