[fpc-devel] Generic method works on Linux, not on Windows?

Joost van der Sluis joost at cnoc.nl
Wed May 27 00:01:24 CEST 2020

Op 26-05-2020 om 23:36 schreef Yuriy Sydorov:
> Does it happen with the fpc trunk?
> If yes, what revision do you use? It looks like an issue with my initial 
> implementation of the $parentfp parameter optimization. "$fin$00000037" 
> is a reference to an internal SEH handler procedure which is a special 
> nested procedure.

Yes, Trunk, updated last sunday. (And today, didn't help) x86_64

> The latest trunk for win32 compiles fine the following modified example:
> {$mode objfpc}{$H+}
> generic function CreateObjectFromJSONString<T>(AJSONString: string; 
> ADescriptionTag: string = ''): T;
> begin
>    Result := nil;
> end;
> var
>    LaunchRequest: TObject;
> begin
>    LaunchRequest := specialize CreateObjectFromJSONString<TObject>('qwe');
> end.

It's this project: https://gitlab.freepascal.org/Joost/fpdserver/

And the generic function is defined in:


I'll try your code tomorrow. Maybe I can get an easier example.



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