Problem with User Defined Function

Problem with User Defined Function - Printable Version

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+---- Thread: Problem with User Defined Function (/showthread.php?tid=547)

Problem with User Defined Function - RNBW - 06-13-2022

When I try to compile this snippet

Code: (Select All)
Type ButtonT

    x As Integer        'Position left top

    y As Integer

    w As Integer        'Height

    h As Integer        'Width

    text As String        'label

End Type

Function Button(x As Integer, y As Integer, w As Integer, h As Integer, Text As String) As ButtonT                                    

  'Defines and draws a new button

    Dim As ButtonT btn

    btn.x = x

    btn.y = y

    btn.h = h

    btn.w = w

    btn.text = text

    'Button_Draw(btn, ButtonColor) 

  Return btn

End Function

I get the following error:

------------------------
Expected )
Caused by (or after):
Line 9:
Function Button_New(x As Integer, y As Integer, w As Integer, h As Integer, Text As String) As Button
------------------------

Can someone clarify what I am doing wrong.

RE: Problem with User Defined Function - bplus - 06-13-2022

Code: (Select All)
Function Button(x As Integer, y As Integer, w As Integer, h As Integer, Text As String) As ButtonT

"As Button" on end is trying to make a Function return a ButtonT. As I said in Simple GIU thread, QB64 Functions can not return UDT's like FreeBasic can. It's not a simple translation from FB because, again, FB can do UDT arrays and Functions can return UDT's neither of which QB64 can do directly.

You'd have to change it to a sub and "output" the btn in the parameters:

Code: (Select All)
Type ButtonT

    x As Integer 'Position left top

    y As Integer

    w As Integer 'Height

    h As Integer 'Width

    text As String 'label

End Type

Sub Button (x As Integer, y As Integer, w As Integer, h As Integer, Text As String, btn As ButtonT)

    'Defines and draws a new button

    'Dim As ButtonT btn

    btn.x = x

    btn.y = y

    btn.h = h

    btn.w = w

    btn.text = Text

    'Button_Draw(btn, ButtonColor)

End Sub

RE: Problem with User Defined Function - RNBW - 06-14-2022

@bplus
Yes, that's solved it.