Copying structures

[User_Russian]

Suppose we have two structures and one inherits the other. As far as correctly their copy function CopyStructure() and do not call it a problem?

Example.

Code: Select all

Structure Test
  String.s
  List x.s()
EndStructure

Structure TestEx Extends Test
  State.a
  Array y.l(10)
EndStructure

x.Test
y.TestEx

x\String="1234"

For i=0 To 10
  AddElement(x\x())
  x\x() = Str(i)
Next i

CopyStructure(@x, @y, Test)

Debug y\String

ForEach y\x()
  Debug y\x()
Next

Debug y\State

Size = ArraySize(y\y())
Debug Size

For i=0 To Size
  Debug y\y(i)
Next

Code seems to work without errors. But can there be any problems because of this copy?

[idle]

It should be fine when using native types and objects
but if you use pointers and heap allocated objects you may need to manually copy nested items.

[skywalk]

Apologize if these have been asked before?
What is the difference between:
CopyStructure(Struct1, Struct2, someStruct)
and
Struct2.someStruct = Struct1.someStruct?

ClearStructure(@Struct1, someStruct) vs ResetStructure(@Struct1, someStruct)?

[#NULL]

i think CopyStructure() makes sense only if Struct2 was a pointer (*Struct2) where assignment wouldn't copy.

ClearStructure() will invalidate/delete any List or Map object ect. contained in the structure and would need an additional InitializeStructure() to make those usable again.

ResetStructure() will empty those but keep them alive.

[skywalk]

Thanks, I'll reference your reply in my comments for Structures.
I read the help a few times without seeing the differences.