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
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