OpenEuphoria

RE: Declaring a Function Before it is used

• Posted by "Ricardo Forno" <rmforno at tutopia.com> Oct 29, 2003
• 441 views

Maybe you mean "use a function before it is declared"?
If your program really needs that, then it is not so simple. In fact, this
is necessary only when you have two (or more) mutually recursive functions.
Regards.
----- Original Message -----
From: Michelle Rogers <michellerogers at bellsouth.net>
To: <EUforum at topica.com>
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"?
>
> ----- 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!
>
>