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RE: Declaring a Function Before it is used

• Posted by Tommy Carlier <tommy.carlier at pandora.be> Oct 28, 2003
• 447 views

> Can anyone tell me if there is a way to declare a function before it
> is used.
> 
> If not, how do you handle things like:
> Run Function A, which calls Function B
> Function B calls Function C
> If statement then
>   Function C calls Function D
> else
>   Function C calls Function A
> end if
> 
> This seems impossible to handle if you can't declare Function A ahead of
> time, because you can't move it ahead of Function C to solve the 
> problem,
> since that causes a problem of not being able to call Functions B and C 
> from
> Function A

If I need something like this, I use routine_id:

integer Callee_routine_id

procedure _Callee(int x)
   call_proc(Callee_routine_id, {x})
end procedure

procedure Caller()
-- 'Caller' needs to call 'Callee'
   _Callee(15) -- instead of calling Callee, you call _Callee
end procedure

procedure Callee(int x)
-- do something with x
end procedure
Callee_routine_id = routine_id("Callee")