Re: Dynamic message typing problem

FROM : Scott Ribe
DATE : Fri May 16 23:52:33 2008

> ...if the method
> name is unique, the types of the parameters are determined.


Not unless a declaration is visible. Your reasoning is that there's no other
printFloat: so the compiler should know, but this is still (sort of) C--if
you don't include a declaration that tells the compiler what the parameter
types are, it doesn't know. In other words, it ain't C# or Java, it depends
on those .h files ;-)

> Any idea where I should look to find ways of correcting this code?


You need to have a declaration of printFloat visible where it is called. Any
declaration of printFloat, not necessarily the one in the anonymous class:
that one, or one in a base class, or a category, or a protocol.

Also, you need to make sure that all instances of the printFloat: method are
declared the same. OK, that is not ***100% strictly required***, but having
a printFloat: in one class that takes a float, and one in another class that
takes a different kind of argument, is ***not*** an easy thing to deal with.

--
Scott Ribe
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http://www.killerbytes.com/
(303) 722-0567 voice