[REBOL] Re: I hate computers!
From: edanaii:cox at: 5-Jan-2003 9:26
Joel Neely wrote:
>OTOH, staying with the REDUCE allows one to use VALID-TYPE? with
>exemplars as well, since the expressions would evaluate to types
>in something like
>
> valid-type? foo [type? something type? somethingelse]
>
>Good thing the cat has nine lives, as he can be skinned so many
>different ways!
>
But would you want to do this?
The purpose of the function was to allow the use of multiple datatypes
for a parameter and still keep it optional.
As was pointed out to me earlier, the use of Any-Type! seems to make a
parameter optional. Were I to define a parameter as such: Parameter [
String! Money! ], if I omit the parameter when called, it blows up. But
with any-type!, it doesn't. So this was a means to have multiple
parameters and have it optional. This would allow me to do some
overloading, i.e. fall Foo with a String performs a different action
than Foo with Money or Foo without a parameter.
--
Sincerely, | Don't part with your illusions. When they are gone
Ed Dana | you may still exist, but you have ceased to live.
Software Developer | -- Mark Twain
1Ghz Athlon Amiga |
