Qustion about validate: has:

[Chris Muller]

It's not testing respondsTo:.  Its testing that the Magma programmer
remembered to *override* #maWantsPreSerialization or
#maWantsPostMaterialization to answer true.

I must admit I care much for the implementation, but this is just a
validation-check during initialization of your system, not something
called over and over.  Nevertheless, if anyone has any ideas of a
better way I'm open..

 - Chris

--- keith hodges <keith.hodges at warwick.ac.uk> wrote:

> I found this code but I am wondering why not use #respondsTo:
> 
> Keith
> 
> ====
> 
> validate: className has: selector
> 
>     (Smalltalk hasClassNamed: className) ifFalse: [ "No validation
> needed" ^ self ].
>     ((Smalltalk at: className) basicNew perform: selector)
>         ifFalse:
>             [ MaObjectSerializationUserError signal: 'Need to
> implement
> ', selector, ' on ', className ]
> 
> 
> 
> 		
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