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Author Topic: Casting integers as objects  (Read 2409 times)

WildMan

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Casting integers as objects
« on: September 24, 2019, 04:31:13 am »
I've got a lot of places where I store an integer in the object list for a combobox like this:

SomeComboBox.Items.AddObject('Sample',tObject(Y));

And then retrieve it by casting it the other way...

Y:=LongInt(SomeComboBox.Items.Objects
  • );


That's always worked well but after updating Lazarus and Free Pascal I now get a message Error: Illegal conversion "TObject" to "LongInt" when compiling.  Is it a setting I can't seem to find or is this no longer allowed?
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bytebites

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Re: Casting integers as objects
« Reply #1 on: September 24, 2019, 05:06:48 am »
Code: Pascal  [Select][+][-]
  1. Y:=PtrUInt(SomeComboBox.Items.Objects
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skalogryz

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Re: Casting integers as objects
« Reply #2 on: September 24, 2019, 05:53:59 am »
Quote from: WildMan on September 24, 2019, 04:31:13 am
That's always worked well but after updating Lazarus and Free Pascal I now get a message Error: Illegal conversion "TObject" to "LongInt" when compiling.  Is it a setting I can't seem to find or is this no longer allowed?
It sounds like you've also updated to 64-bit version.
You can still do TObject to LongInt, but only for 32-bit CPU target.
When you're in 64-bit you might want to use PtrUInt instead.
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Thaddy

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Re: Casting integers as objects
« Reply #3 on: September 24, 2019, 07:22:35 am »
And that would be the case for 64 bit Delphi too. It is not Lazarus or FPC specific, not even Pascal specific.
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