Function create_singletons_eagerly_impl

example/eager_singletons.cpp:36–38

template <class TDependency, class TInjector,
          std::enable_if_t<std::is_same<typename TDependency::scope, di::scopes::singleton>::value, int> = 0>
void create_singletons_eagerly_impl(const di::aux::type<TDependency>&, const TInjector& injector) {
  injector.template create<std::shared_ptr<typename TDependency::expected>>();
}

template <class TDependency, class TInjector,
          std::enable_if_t<!std::is_same<typename TDependency::scope, di::scopes::singleton>::value, int> = 0>