Memento Class Reference

Memento Design Pattern. More...

#include <memento.hpp>

Classes
class	Snapshot

Public Member Functions
Snapshot	save ()
void	load (const Memento::Snapshot &state)

Detailed Description

Memento Design Pattern.

Warning

You must implement _saveToSnapshot and _loadFromSnapshot

class MyClass : public Memento
{
private:
  int         _value;
  std::string _name;
  void _saveToSnapshot(Memento::Snapshot& snapshot) const override
  {
      snapshot << _value << _name;
  }
  void _loadFromSnapshot(Memento::Snapshot& snapshot) override
  {
      snapshot >> _value >> _name;
  }
public:
 MyClass(int value, const std::string& name) : _value(value),
                                              _name(name) {}
};

Note

Basic Usage

MyClass obj(42, "Initial");
Memento::Snapshot snapshot = obj.save();
 
// Modify object state
obj = MyClass(100, "Modified");
 
// Restore previous state
obj.load(snapshot);
 
// Now obj has _value = 42 and _name = "Initial"

Definition at line 48 of file memento.hpp.

Member Function Documentation

load()

void Memento::load

(

const Memento::Snapshot &

state

)

Definition at line 15 of file memento.cpp.

References Memento::Snapshot::reset().

save()

Memento::Snapshot Memento::save

(

)

Definition at line 3 of file memento.cpp.