OpenEuphoria

Re: Declaring a Function Before it is used

• Posted by Derek Parnell <ddparnell at bigpond.com> Oct 29, 2003
• 383 views

----- Original Message ----- 
From: "Michelle Rogers" <michellerogers at bellsouth.net>
To: <EUforum at topica.com>
Sent: Wednesday, October 29, 2003 10:09 AM
Subject: Re: Declaring a Function Before it is used


> 
> 
> wait a sec...i thought this language was supposed to be EASIER to use...then
> why would you have to go through all of this for a simple "declare a
> function before it's used"?

I 100% agree. I believe that the author of Euphoria regards forward referencing
as a bad programming practice and therefore will not support it.

 
> ----- Original Message -----
> From: "Derek Parnell" <ddparnell at bigpond.com>
> To: <EUforum at topica.com>
> Sent: Tuesday, October 28, 2003 7:10 AM
> Subject: Re: Declaring a Function Before it is used
> 
> 
> > ----- Original Message -----
> > From: "Michelle Rogers" <michellerogers at bellsouth.net>
> > To: <EUforum at topica.com>
> > Sent: Tuesday, October 28, 2003 10:06 PM
> > Subject: Declaring a Function Before it is used
> >
> >
> > > Also, can anyone tell me if there is a way to declare a function before
> it
> > > is used.
> >
> > You can't, damn it! This is the thing I most want in Euphoria, but the
> author is philosophically against it.
> >
> > > 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
> > >
> >
> > Welcome to the wonderful world of 'routine_id()'.
> >
> > The function 'routine_id()' returns an index to a routine, and the
> routines 'call_proc()' and 'call_func()' can use this index to invoke the
> routine indirectly. Here is an example...
> >
> > -- This need to be near the front of the file.
> > integer r_FuncA, r_FuncB, r_FuncC, r_FuncD
> >
> > function FuncA()
> >   x = call_func(r_FuncB,{})
> > end function
> >
> > function FuncB()
> >  x = call_func(r_FuncC,{})
> > end function
> >
> > function FuncC()
> >  if statement then
> >     x = call_func(r_FuncD,{})
> >  else
> >     x = call_func(r)FuncA,{})
> >  end if
> > end function
> >
> > function FuncD()
> >  . . .
> > end function
> >
> > -- These need to be after the routines they are referring to.
> > r_FuncA = routine_id("FuncA") -- Notice the routine name is in a string.
> > r_FuncB = routine_id("FuncB")
> > r_FuncC = routine_id("FuncC")
> > r_FuncD = routine_id("FuncD")
> >
> >
> > --
> > Derek
> >
> >
> > TOPICA - Start your own email discussion group. FREE!
> >
> >
> 
> 
> TOPICA - Start your own email discussion group. FREE!
> 
>