Pass pointers as parameters.

Posted on 2002-04-02
Medium Priority
Last Modified: 2010-04-04
Hi again experts!

I want to make a function which executes an SQL sentence on any existing TQuery component. I'm attempting to pass a pointer to the TQuery object as a parameter, but the compiler gives me an error at the function prototype:
"Identifier expected but '^' found".
Here is the code:

 TServeis = class(TObject)
  { Private declarations }
  prova: ^TQuery; //this line compiles correctly
  function BDEToStringList(Sentencia,Camp: String;var Llista: TStringList): Boolean;
  function Cerca(Sentencia,Camp: String):Variant;
  function ManipulaQ(Sentencia: TStrings;PQ: ^Integer):Integer; //error
  function ConsultaQ(Sentencia: TStrings;PQ: ^TQuery):Integer; //error

Any ideas are welcome! Thank you!
Question by:Kurtis
LVL 27

Accepted Solution

kretzschmar earned 300 total points
ID: 6913554
as every tobject is a pointer to itself,
you don't need the ^-sign

TServeis = class(TObject)
 { Private declarations }
 prova: TQuery; //this line compiles correctly
 function BDEToStringList(Sentencia,Camp: String;var Llista: TStringList): Boolean;
 function Cerca(Sentencia,Camp: String):Variant;
 function ManipulaQ(Sentencia: TStrings;PQ: ^Integer):Integer; //don't know for what this may be
 function ConsultaQ(Sentencia: TStrings;PQ:  TQuery):Integer; //error

meikl ;-)

Author Comment

ID: 6913587
It was pretty simple.
Thanks kretzschmar!

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