Editing Command pattern (section)

== Example ==
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This C++14 implementation is based on the pre C++98 implementation in the book.

<syntaxhighlight lang="c++">
#include <iostream>
#include <memory>

class Command {
public:
  // declares an interface for executing an operation.
  virtual void execute() = 0;
  virtual ~Command() = default;
protected:
  Command() = default;
};

template <typename Receiver>
class SimpleCommand : public Command { // ConcreteCommand
public:
  typedef void (Receiver::* Action)();
  // defines a binding between a Receiver object and an action.
  SimpleCommand(std::shared_ptr<Receiver> receiver_, Action action_) :
    receiver(receiver_.get()), action(action_) { }
  SimpleCommand(const SimpleCommand&) = delete; // rule of three
  const SimpleCommand& operator=(const SimpleCommand&) = delete;
  // implements execute by invoking the corresponding operation(s) on Receiver.
  virtual void execute() {
    (receiver->*action)();
  }
private:
  Receiver* receiver;
  Action action;
};

class MyClass { // Receiver
public:
  // knows how to perform the operations associated with carrying out a request. Any class may serve as a Receiver.
  void action() {
    std::cout << "MyClass::action\n";
  }
};

int main() {
  // The smart pointers prevent memory leaks.
  std::shared_ptr<MyClass> receiver = std::make_shared<MyClass>();
  // ...
  std::unique_ptr<Command> command = std::make_unique<SimpleCommand<MyClass> >(receiver, &MyClass::action);
  // ...
  command->execute();
}
</syntaxhighlight>

The program output is

<syntaxhighlight lang="c++">
MyClass::action
</syntaxhighlight>