[fpc-devel] Re: RFC: Delphi style class helpers

[Marco van de Voort]

In our previous episode, Sven Barth said:
> 
> In the last few days I've written quite a few tests regarding class 
> helpers and have come across some interesting cases. I've used Delphi 
> 2007 to compile these tests.

C:\testing>dcc32 tchlp20.dpr
Embarcadero Delphi for Win32 compiler version 22.0
Copyright (c) 1983,2010 Embarcadero Technologies, Inc.
tchlp20.dpr(14) Error: E2527 Helper type 'TObjectHelper' cannot be used in
declarations
tchlp20.dpr(19)

Embarcadero Delphi for Win32 compiler version 22.0
Copyright (c) 1983,2010 Embarcadero Technologies, Inc.
tchlp36.dpr(23) Warning: W1036 Variable 'f' might not have been initialized
tchlp36.dpr(25)
26 lines, 0.03 seconds, 13512 bytes code, 13104 bytes data.

Embarcadero Delphi for Win32 compiler version 22.0
Copyright (c) 1983,2010 Embarcadero Technologies, Inc.
tchlp35.dpr(6) Error: E2003 Undeclared identifier: 'TObjectHelperA'
tchlp35.dpr(6) Error: E2022 Class helper type required
tchlp35.dpr(7) Error: E2137 Method 'VirtualTest' not found in base class
tchlp35.dpr(20) Error: E2003 Undeclared identifier: 'Test'
tchlp35.dpr(25)

uchlp36 compiles without warnings