Structures with default values

[GPI]

for example:

Code: Select all

Structure Counter
  value.i = 10
EndStructure

a.counter
debug a\value ;should return 10

It should be possible to add ?labels and @procedures as default values.

[c4s]

+1

[Shield]

I know this doesn't have the syntactic sugar, but you may be able to use this:

Code: Select all

Structure Car
  name.s
  speed.i
EndStructure

Global DefaultCar.Car
DefaultCar\name = "DefaultCar"
DefaultCar\speed = 100

Procedure DoCarStuff()
  Protected car.Car
  
  car = DefaultCar
  Debug car\name
  Debug car\speed
EndProcedure

DoCarStuff()

I'd be more for something like a default constructor function as defining the default values inline
is limiting, e.g. what if the struct contains arrays or lists/maps?

[GPI]

In lua there are things like Metatables, which are able to change the behaviour of tables/variables.
Maybe something like CreateHook(structure, hooktype,@hock()) , wher hooktype could be #pb_hook_creation, #pb_hook_destruction and so on.

But i think it is too "anti-Basic". The solution above is easy to understand.

I would solve this then like this:

Code: Select all

Prototype __create(*structure)
Declare something_create()
Structure something
  create.__create = @something_create()
  ...
EndStructure
Procedure something_create(*self.something)
  ....
EndProcedure

Define x.something\create(x)

or when you look at my other Request:

Code: Select all

Declare something_create()
Structure something
  create.i (*structure) = @something_create()
  ...
EndStructure
Procedure something_create(*self.something)
  ....
EndProcedure

Define x.something\\create()

[STARGÅTE]

Structures with predefined member values (2012)
Default Values in Structure Definition (2009)

[GPI]

Sometimes it is not a bad idea to rethink an old idea