#ifndef SCOPE_EXIT_HH

#define SCOPE_EXIT_HH

// Simplified version of

//    https://en.cppreference.com/w/cpp/experimental/scope_exit

//

// Typically used to execute some cleanup action whenever a certain scope is

// left. Either via the fall-through code path, a return/break/continue or via

// an exception.

//

// Example usage:

//     bool f() {

//         char* ptr = some_c_style_function_that_returns_an_owning_pointer()

//         scope_exit e([&]{ free(ptr); });

//         if (some_check(ptr)) return false; // 1

//         stuff_which_might_throw(); // 2

//         return true; // 3

//     }

//

//     Note: 'free(ptr)' is called when we exit the function via 1) 2) or 3)

#include <concepts>

#include <utility>

template<std::invocable FUNC>

class scope_exit

{

public:

    explicit scope_exit(FUNC&& action_)

        : action(std::forward<FUNC>(action_))

    {

    }

    ~scope_exit()

    {

        action();

    }

private:

    [[no_unique_address]] FUNC action;

};

#endif