get/set/pro

[relez]

another of my doubts....

this code, using get

Code: Select all

class Punto
   var _xcoor as int
   var _ycoor as int
   var _zcoor as int

   def init(x as int, y as int, z as int)
      _xcoor = x
      _ycoor = y
      _zcoor = z

   get xcoor from var

and this, using pro

Code: Select all

class Punto
   var _xcoor as int
   var _ycoor as int
   var _zcoor as int

   def init(x as int, y as int, z as int)
      _xcoor = x
      _ycoor = y
      _zcoor = z

   pro xcoor from var

are absolutely equivalent or is there some deep difference?

[Charles]

"pro" is a read/write property. You can assign to it.

"get" is a read-only property. You cannot assign to it.

class X

    # example 1

    pro y from var
    # is short for the explicit declaration:
    pro y as <type of var>
        get
            return var
        set
            var = value
    # from outside the class you could say:
    x = X()
    x.y = <expr>
    # or within the class:
    .y = <expr>

    # example 2

    get y from var
    # is short for the explicit declaration:
    pro y as <type of var>
        get
            return var
    # notice the missing "set" part
    # you cannot assign to .y