Pretty much for that reason. #species allows some collection methods to 
return a more general type if the specific type might not yield expected 
or pleasant results. E.g.

#f00,var1,' ',var2,' = ',var3

would produce lots of intermediate symbols with the associated overhead 
when a string result is more likely the desired result.

BTW, Andreas simply moved the existing Symbol>>species into ByteSymbol 
and WideSymbol when they entered Squeak. The original use is much older.

Cheers,
Bob

On 4/5/13 8:40 AM, Frank Shearar wrote:
> Why would this be? I mean, it has Andreas' initials on it so I presume
> there's good reason.
>
> It means that #foo, '1' returns 'foo1', not #foo1.
>
> (This is why the ClassFactoryForTestCase-using tests are all failing.
> The fix for the tests is in SUnit-fbs.94.)
>
> frank
>
>

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