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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘Delphi 11.0 Alexandria (Olympus)’ Category

“Incompatible parameter lists” when using Types.T*DynArray? – VCL – Delphi-PRAXiS [en]

Posted by jpluimers on 2024/12/24

Reminder to self: Delphi 11.3 (Alexandria update 3), mid-product added a compiler changing kind of deprecating using types of this form (including ones defined in the System, System.Types and other RTL/VCL units):

Overview of “deprecated” * and alternative array types
“deprecated” alternative: write it all out
TBooleanDynArray TArray<Boolean>
TByteDynArray TArray<Byte>
TCardinalDynArray TArray<Cardinal>
TStringDynArray TArray<string>
  • technically not deprecated, as deprecated is a hinting directive and despite these having existed for almost 25 years now**, hinting directives like platform, deprecated, or library cannot be used on array types:a bug has been filed for this in 2017 but still has not been addressed, see my earlier blog post Delphi Declarations and Statements: Hinting Directives.

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Posted in Delphi, Delphi 11.0 Alexandria (Olympus), Development, Software Development | Leave a Comment »

Delphi has had a more type safe FreeAndNil or a while now, but in order to do so it lies to you

Posted by jpluimers on 2024/06/26

During my year+ of cancer treatments, Embarcadero did a tiny thing that makes [Wayback/Archive]FreeAndNil safer to use. In order to do so, the method now lies to you by taking a const [ref] parameter which technically it is not allowed to change, but the internal hackery allows it to. Dalija Prasnikar explained it in 2020: [Wayback/Archive] Magic behind FreeAndNil.

The new signature is this:

procedure FreeAndNil(const [ref] Obj: TObject); inline;

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Posted in Conference Topics, Conferences, Delphi, Delphi 10.4 Sydney (Denali), Delphi 11.0 Alexandria (Olympus), Development, EKON, Event, Software Development | 2 Comments »