Ian S. Worthington wrote:
> Hi --
>
> In many other OO languages I can write (polymorphic, iirc?) methods which have
> the same name but different types (and numbers) of arguments eg
>
> boggis( string )
> boggis( array )
>
> I can't find how to do this in oorexx, or indeed if its possible.
>
> Failing that, given that boggis( thing ) is happy to accept both a string
> object or an array, is there a way for boggis to determine what its been
> handed so it can take the appropriate action?
>
>
> ian
>
This is actually easy. The main thing to understand is that a method can
receive any number or types of arguments. The method must decide what to
do wit the arguments. For instance:
::method mymethod
if arg() = 3 then do
use arg t1, t2 ,t3
end
else do
use strict arg t1, t2
end
if t1~datatype('W') then ...
else ...
and so forth. There is no need, and in fact no way, to define multiple
methods with the same name with different signatures (signatures do not
exist in ooRexx). The method itself is the sole arbitrator of how
arguments are interpreted.
David Ashley
ooRexx Team
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