Is it possible to define {$IFDEF} for more than one directive at once?

Question

Is it possible to define more than one conditional in one {$IFDEF} directive ?
I would like to have syntax like this:

{$IFDEF Condition1 OR Condition2} DoSomething; {$ENDIF}
{$IFDEF Condition1 AND Condition2} DoSomethingElse; {$ENDIF}

Thanks

score 68 · Accepted Answer · answered Jan 04 '12 at 10:03

68

You would need to use $IF instead:

{$IF Defined(Condition1) or Defined(Condition2)}
DoSomething;
{$IFEND}

answered Jan 04 '12 at 10:03

David Heffernan

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1

Thanks, that's exactly what I needed. I guess you're not only the lead developer but also a build manager in your company, don't you ? – Martin Reiner Jan 04 '12 at 10:17
2

@MartinReiner, also the president, the director-general and the senior janitor ;-) – OnTheFly Jan 04 '12 at 11:27
1

`{$ENDIF}` instead of `{$IFEND}` – Bosshoss Nov 22 '22 at 14:19
@Bosshoss not when this was written back in 2012 – David Heffernan Nov 22 '22 at 14:31

score 20 · Answer 2 · answered Jan 04 '12 at 11:19

In case you have to support old Delphis (without the support for the $IF metadirective), you can use one simple and one ugly workaround:

//AND
{$IFDEF Cond1}{$IFDEF Cond2}DoSomething{$ENDIF}{$ENDIF} 

//OR
{$UNDEF Cond1OrCond2}
{$IFDEF Cond1}{$DEFINE Cond1OrCond2}{$ENDIF}
{$IFDEF Cond2}{$DEFINE Cond1OrCond2}{$ENDIF}
{$IFDEF Cond1OrCond2}DoSomething{$ENDIF}

If you are repeating the test more than once, first case should be rewritten as follows.

{$UNDEF Cond1AndCond2}
{$IFDEF Cond1}{$IFDEF Cond2}{$DEFINE Cond1AndCond2{$ENDIF}{$ENDIF} 

{$IFDEF Cond1AndCond2}DoSomething{$ENDIF}

old delphis in this context are D5 and older IIRC – David Heffernan Jan 04 '12 at 11:46 — David Heffernan, Jan 04 '12 at 11:46

PresleyDias · Answer 3 · 2012-01-04T10:17:20.053

6

hey try this from the embarcadero.com

begin
  ...
 {$IF Defined(MY_DEFINE) and (LibVersion > 2.0) }
  Writeln(1);
 {$ELSE}
  Writeln(2);  

  ... 
  {$IFEND}
 end;

edited Jan 04 '12 at 10:17

answered Jan 04 '12 at 10:12

PresleyDias

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Is it possible to define {$IFDEF} for more than one directive at once?

3 Answers3