[fpc-pascal] how to initialize a SearchRec var?

[Graeme Geldenhuys]

On 2014-01-02 19:21, waldo kitty wrote:
> 
> we do not want to turn off hints so how can we initialize dirinfo and make fpc 
> happy?


I hate such hints too! This is what I did in my code to prevent that
unwanted hint.

One part is the usage of an out parameter, and the second part is the
{$HINT OFF} directive.


----8<-------------8<-------------8<-------------8<-------------8<----
program test_SearchRec;

uses
   Dos;

const
   pattern : string = '*.pas';

var
   dirinfo : SearchRec;

// prevents the compiler hint about not initialized variables
procedure dcpFillChar(out x; count: SizeInt; Value: Byte);
begin
  {$HINTS OFF}
  FillChar(x, count, value);
  {$HINTS ON}
end;


begin

   dcpFillchar(dirinfo,sizeof(dirinfo),$00);
   FindFirst(pattern,AnyFile,dirinfo);
   findclose(dirinfo);
end.
----8<-------------8<-------------8<-------------8<-------------8<----


And here is the compiler output:

[tmp]$ fpc -viwnh test_SearchRec.pas
Hint: Start of reading config file /home/graemeg/.fpc.cfg
Hint: End of reading config file /home/graemeg/.fpc.cfg
Free Pascal Compiler version 2.6.2 [2013/02/10] for x86_64
Copyright (c) 1993-2012 by Florian Klaempfl and others
Target OS: FreeBSD for x86-64
Compiling test_SearchRec.pas
Linking test_SearchRec
25 lines compiled, 0.0 sec
2 hint(s) issued


Regards,
  - Graeme -

-- 
fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal
http://fpgui.sourceforge.net/