OpenEuphoria

RE: built in routine id's

• Posted by bensler at mail.com Mar 22, 2002
• 473 views

Carl R. White wrote:
> Chris Bensler wrote:
> 
> > Why can't I get the routine id of a built in?
> >
> > ? routine_id("sequence")
> 
> I agree with you on this one, which I admit isn't really like me when it
> comes to adding things to Euphoria. :)
> 
> There is a workaround:
> 
>   global function s_(object o) return sequence(o) end if
>   global constant sequence_id = routine_id("s_")
>   -- now use 'sequence_id' instead of 'routine_id("sequence")'
> 
> ...but using this means that call_func()'s are slower than they could 
> be.
> 
> Also, you have to write your own wrapper func/procs for every built-in 
> you
> want to get the routine_id of.
> 
> > BTW:
> > Did anyone else know they could get the routine_id() of a type? It is
> > just a function after all, but it doesn't seem to be documented.
> 
> I did know this. It's all down to experimentation (which, IMHO, too many
> people don't do). It's also when I discovered that the built-in types 
> and
> functions don't have their own routine_id's.
> 
> Try this for madness. There's a quiz at the end so pay attention :) :
> 
> type natural(object o)
>     if integer(o) then return o >= 0 end if
>     return 0
> end type
> 
> with trace trace(1)
> 
> integer beeble_id
> type bobble(object o)
>     if not natural(o) then return 0 end if
>     return call_func(beeble_id, {o-1})
> end type
> 
> type beeble(object o)
>     if not natural(o) then return 0 end if
>     if not o then return 1 end if
>     return bobble(o-1)
> end type
> beeble_id = routine_id("beeble")
> 
> beeble a
> bobble b
> 
> a = 4
> b = 5
> b *= b
> a = (b-1)/a
> 
> ? a
> 
> POP QUIZ:
> 
> Do it on paper first before running it.
> Do the same again starting with a = 8.
> What happens in each case, and did it do what you expected?
> What are better names for beeble and bobble? (Hint: The second letter of
> each is a clue).
> 
> beeble-bobble-beeble-bobble, ;)
> Carl

I've just discovered this problem, so it's just barely made it's way 
onto my wishlist. I wouldn't consider it a priority item, though it 
would be a simple and welcomed improvement for EU.

That's a neat little snippet
It's not what I had expected :)
I won't answer the other question, so others can be intrigued as well :P

Chris