using later defined procedures

[nugax]

This is remedial, i know... but its driving me nuts.

If i have a procedure that calls a procedure that is defined later, how can I use it? Is there a way to declare it so it can be used now in a procedure, yet defined later?

[rvk]

Like this:
http://wiki.freepascal.org/Forward_Referencing

Code: Pascal  [Select][+][-]

1. procedure Later (parameter list); forward;
2.  
3. procedure Sooner (parameter list);
4. begin
5.   ...
6.   Later (parameter list);
7. end;
8. ...
9. procedure Later;
10. begin
11.   ...
12.   Sooner (parameter list);
13. end;

[Eugene Loza]

or like this

Code: Pascal  [Select][+][-]

1. Unit SomeUnit;
2. interface
3. procedure Later; //makes it also available for other units, mark no "forward" here.
4. implementation
5. procedure Sooner;
6. begin
7.   Later;
8. end;
9.  
10. procedure Later;
11. begin
12.   DoSomething;
13. end;