[Chandler-dev] Re: Rough cut of phase 1 EIM API & docs

[Morgen Sagen]

On Oct 11, 2006, at 4:37 PM, Phillip J. Eby wrote:

> FYI, I just finished a rough implementation of the phase 1 EIM API  
> (primitive types, aliasing, and conversion).  It's not in SVN yet  
> (so as not to interfere with a4 work), but here is the current  
> doctest, warts and all.  (Most of the warts will be fixed when  
> phase 2 kicks in, adding "Record" and "field" types that will  
> produce better examples.)
>
> Review and comments welcomed and requested.
>
[...]
> Creating Subtypes
> -----------------
>
> Sometimes, it's useful to create a field type by copying an  
> existing type.  The ``sharing.subtype()`` function creates a new  
> type from an existing one.  The new type will be of the same  
> primitive type, and it will "inherit" any conversion functions  
> defined for the base type::

Hey Phillip, looks good.  Can you give an example of when we might  
want to create a subtype?

Thanks,
~morgen