[self-interest] A question about method slots

David Ungar ungar at me.com
Sat Mar 8 23:49:38 UTC 2014

Methods are immutable, BTW. When you edit one in the debugger it does a "become".

On Mar 8, 2014, at 12:52 PM, Jecel Assumpcao Jr. <jecel at merlintec.com> wrote:

> Michael,
> > But what about a method slot? If I edit a method in a clone, the 
> > original is /not/ affected.
> This is a GUI issue, not a language one. The idea is that the most
> common use for editing a method in an object that also exists in other
> objects in the same "clone family" is that you now want it to be
> different. You want to start a new clone family.
> Note that if you edit the exact same method in a debugger instead of an
> outliner then your change *will* be applied to all the objects in the
> clone family. The idea here is that you found a bug and so all copies of
> the method should be changed. So these two tools act very differently
> but the underlying language is the same.
> "Read-only" means for normal use. Besides methods, we also have
> immutable strings (what would be Symbols in Smalltalk-80). The
> programming tools (and the mirror objects they are built on) are not
> normal use. If we didn't have this "escape hatch" it would be impossible
> to create these read-only objects in the first place.
> -- Jecel

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