Any if you wish to check for specific class type, you can use the isA method.
use arg arg1
if arg1~isA(.array) then do
Rick
On Thu, May 7, 2009 at 9:39 AM, David Ashley <david.ashley....@gmail.com> wrote:
> 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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