Constructor Overloading?

Monkey Forums/Monkey Programming/Constructor Overloading?

therevills

(Posted 2011) [#1]

Can you do this in Monkey somehow?

Class Level
	Field level:Int
	Field round:Int

	Method New()
		Self(1, 1)
	End

	Method New(level:Int, round:Int)
		Self.level = level
		Self.round = round
	End
End

Ive tried the above and get "Expression cannot be invoked."

With Java you would call "this(1, 1)"...

Just checking to see if Ive missed anything...

Fishy

(Posted 2011) [#2]

I think it was Self.New(1, 1) if I recall correctly.

EDIT: Default values are possible in arguments as well so:

Method New(arg1:Int=1, arg2:Int=1)
    ' Bla bla bla
End

therevills

(Posted 2011) [#3]

I think it was Self.New(1, 1) if I recall correctly.

Ive tried that, but still get an error (Syntax error):


Function Main()
	New Level(1,1)	
End

Class Level
	Field level:Int
	Field round:Int
	
	Method New()
		Self.New(1, 1) ' <---- Syntax error
	End
	
	Method New(l:Int, r:Int)
		Self.level = l
		Self.round = r
	End
	
End

Fishy

(Posted 2011) [#4]

Sorry, I was confusing this with "Super.New". Strange that Self.New does not work the same way.

In this case default arguments is the only work around I know about, though less than ideal in some situations.

Function Main()
	New Level()	 ' No args, defaults to (1, 1)
End

Class Level
	Field level:Int
	Field round:Int
	
	Method New(l:Int=1, r:Int=1)
		Self.level = l
		Self.round = r
	End
	
End

Hopefully someone else has the answer you are looking for. :)

therevills

(Posted 2011) [#5]

Yeah looks like default arguments is the only way to do it... Thanks!

MikeHart

(Posted 2011) [#6]

I use constructor overloading too. But I don't have a default one without parameters.

Class sprite
	
	  Field image:Image	
	
	  Field xPos:Float = 0.0		
	  Field yPos:Float = 0.0		
	
	
	  '-----------------------------------------------------------------------------
	  Method New (atl:Image, xp:Int, yp:Int, w:Int, h:Int, startX:Float, startY:Float )
			xPos = startX
			yPos = startY
			image = atl.GrabImage( xp,yp,w,h,1,Image.MidHandle )
	  End
	
	  '-----------------------------------------------------------------------------
	  Method New (fname:String, startX:Float, startY:Float )
			xPos = startX
			yPos = startY
			image = LoadImage (fname, 1, Image.MidHandle)
	  End