FIX: Passing Array to Init with Addobject Passes First Element

ID: Q193077

The information in this article applies to:

Microsoft Visual FoxPro for Windows, versions 5.0, 5.0a

SYMPTOMS

If you attempt to add an object at run-time to a second object with the second object's AddObject method, the added object receives an array as a parameter to it's Init method. Then when you attempt to pass the array to the Init method by reference, it is not passed as an array, instead the first element is passed.

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been corrected in Visual FoxPro 6.0.

MORE INFORMATION

Steps to Reproduce Behavior

Run the following code from a program (.PRG) file: LOCAL loCustObj, laTest[3] Clear * Populate array. laTest[1] = 'One' laTest[2] = 'Two' laTest[3] = 'Three' * Pass array to cst1 Init by reference in CREATEOBJECT() loCustObj = CREATEOBJECT('cst1', @laTest) * Pass array to cst1 Init by reference in AddObject() loCustObj.AddObject('cst2','cst1', @laTest) ?loCustObj.aprop[2] ?loCustObj.cst2.aprop[2] DEFINE CLASS cst1 AS custom DIMENSION aprop[1] PROC Init LPARAMETER taArray * Error "'TAARRAY' is not an array." occurs here from AddObject =ACOPY(taArray, this.aprop) ENDPROC ENDDEFINE

An error dialog displays with the following error:

'TAARRAY' is not an array.

This occurs on the ACOPY() function, when the array is being passed from the AddObject() method. The array is passed correctly from the CREATEOBJECT() function. The array is passed correctly from the AddObject() method under Visual FoxPro 6.0.

If you wish to pass an entire array instead of a particular element to a method or function in Visual FoxPro, you must pass it by reference. This is accomplished by preceding the arrayname with an @ sign, or using the SET UDFPARM command.

REFERENCES

Additional query words: kbVFp600fix kbVFp500abug kbOOP

Keywords :
Version : WINDOWS:5.0,5.0a
Platform : WINDOWS
Issue type : kbbug