Get

Get an instance of a service if it is registered in the handler.

template <typename T>
std::shared_ptr<T> Get();

This method takes a template parameter T which is the service to get.

Parameters

• T: The service to register.

Return value

• A shared pointer to the instance of the service if is found in the handler, nullptr otherwise.

Notes

warning

Don't forget to check if the returned pointer is nullptr before using it.

Examples

class MyServiceA {
 public:
  void DoSomething() { std::cout << "Doing something" << std::endl; }
};

class MyServiceB {
 public:
  void DoSomething() { std::cout << "Doing something" << std::endl; }
};

int main() {
  auto handler = DependenciesHandler::Create();

  handler->Add<MyServiceA>();

  auto refA = handler->Get<MyServiceA>();  // Will work fine
  auto refB = handler->Get<MyServiceB>();  // Will return nullptr

  if (refA) {
    refA->DoSomething(); // Will print "Doing something"
  }
  if (refB) {
    refB->DoSomething(); // Will not be called
  }
  return 0;
}