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Property or indexer '__Usual.Value' cannot be assigned to -- it is read only

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2 years 2 months ago #1 by Arne Ortlinghaus
The following statement with an untyped variable gives the error above
function ControlSetNullValue (oControl , oDB )
..
oControl:Value := false

It seems that the access Value has a special meaning for usuals. Unfortunately it gives conflicts with the control class of the GUI classes.

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2 years 2 months ago #2 by Chris Pyrgas
Hi Arne,

That was fixed about a week ago :-)

Chris

XSharp Development Team
chris(at)xsharp.eu

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2 years 2 months ago #3 by Robert van der Hulst
Arne,
The problem here was that the Usual structure also has a (read only) Value property.
This property returns the contents of the Usual (as an object).

Robert

XSharp Development Team
The Netherlands
This email address is being protected from spambots. You need JavaScript enabled to view it.

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2 years 2 months ago #4 by Frank Maraite
The fastest fix is
function ControlSetNullValue (guiControl AS Control , db AS ??? ) AS VOID

guiControl:Value := false

I would do this immediatly after reporting the bug, you know.

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2 years 2 months ago #5 by Arne Ortlinghaus
Hi Frank,
thank you for the idea.
Unfortunately there are many untyped functions existing and I cannot change them in a simple way. Often the functions are called with different parameters and with different number of parameters, and this not hardcoded to be able to find compiling, but also in macros at customer sites.

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2 years 2 months ago #6 by Frank Maraite
just start doing it whenever you stumble over an issue like this. And of course whenever you see an untyped function/method. Even the longest way starts with the first step.
Permanent refactoring things like this takes an important amount of time in my work since the early 90ies.

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