jeffersonfr

#include <functional>

template <typename T> struct MutableState;

template <typename T> struct State {
  State(MutableState<T> &state) : mState{state} {}

  virtual void observe(std::function<void(T const &)> callback) {
    mState.mCallback = callback;
  }

jeffersonfr

#include <iostream>
#include <type_traits>
#include <tuple>
#include <memory>

template <typename T, typename ...Args>
T inject(Args ...args) {
    if constexpr (!std::is_pointer_v<T>) {
        return T{std::forward<Args>(args)...};
    } else {

jeffersonfr

#include <iostream>
#include <type_traits>
#include <functional>

struct DeferObject {
        DeferObject() = default;

        ~DeferObject() {
                mCallback();
        }