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- Operating mode
- Variable copy rules
Clone (Function) In french: Clone Constructs a copy of a class instance. // There is a traffic light in North Phoenix, at 4725 E. Mayo Blvd.
// It is red
StopLight is TrafficLight
StopLight.Address = "4725 E. Mayo Blvd., Phoenix, AZ"
StopLight.Status = DarkRed
// Another traffic light must be set at 5599 on the same boulevard
// If the object is simply copied...
CopyLight is dynamic TrafficLight = StopLight
CopyLight.Address = "5599 E. Mayo Blvd., Phoenix, AZ"
// The address of StopLight has also changed...!
// If the object is cloned...
CloneLight is dynamic TrafficLight = Clone(StopLight)
// CloneLight contains the same information as StopLight
// But if one of it properties is modified, it does not affect the original traffic light
// Change the address
CloneLight.Address = "5599 E. Mayo Blvd., Phoenix, AZ"
// >> StopLight.Address = "4725 E. Mayo Blvd., Phoenix, AZ"
CloneLight.Status = DarkRed
// >> StopLight.Status = DarkGreen
Syntax
<Result> = Clone(<Source>)
<Result>: Character string Instance of the copied class. <Source>: Character string Instance of the class to be copied. Remarks Operating mode When Clone is used: - a new instance of the same class as the original instance is allocated and the constructor is executed by default (without any parameter or optional parameters).
- a member-by-member copy is performed from the original instance to the new instance.
Remark: The copy takes into account the <Copy> attribute of each member: - <Copy=False> to ignore a member,
- <Copy=Clone> to clone (deep copy).
Variable copy rules | | | Type of variables | Effect |
|---|
| Simple types (integer, real, string, etc.) | The value of the variable is copied. | | Arrays | The destination array is a reference to the source array. | | Associative arrays | The content of the array is copied. | | Queue | The content of the queue is copied. | | Stack | The content of the stack is copied. | | List | The content of the list is copied. | | Object = Dynamic object | The members of the dynamic object are copied to the members of the object. | | Object = Object | The members of the source object are copied to the members of the destination object. | | Dynamic object = Dynamic object | The destination dynamic object is a reference to the source dynamic object. | | Dynamic object = Object | The destination dynamic object is a reference to the source object. | | Structure = Dynamic structure | A copy of the structure is performed. Members with the same name are initialized with the existing values. Non-existing members are ignored. | | Structure = Structure | A copy of the structure is performed. Members with the same name are initialized with the existing values. Non-existing members are ignored. | | Dynamic structure = Dynamic structure | The destination dynamic structure is a reference to the source dynamic structure. | | Dynamic structure = Structure | The destination dynamic structure is a reference to the source structure. | | Advanced type = Advanced type | The advanced type variable is copied. Properties of the same name are initialized with the existing values. | | Advanced type = Dynamic advanced type | The advanced type variable is copied. Properties of the same name are initialized with the existing values. | | Dynamic advanced type = Advanced type | The destination dynamic advanced variable is a reference to the source advanced variable. | | Dynamic advanced type = Dynamic advanced type | The destination dynamic advanced variable is a reference to the source dynamic advanced variable. |
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