Hi all, find attached some ideas for the future of quotient_type etc.
Time is too sparse to set everything out in detail here, but a few
corner stones:
* technical separation of lifting infrastructure (with a central role of
the »Quotient« predicate, theory Quotient_Lifting) with the
infrastructure for »defining« new types (theory Quotient_Type_Definition)
* different flavours of type definitions, represented by different locales
* helpful additional theorems for type definitions, esp. concerning code
generation
Maybe future brings an opportunity to discuss that matter. Anyway, a
lot of that material could help to cleanup and streamline the existing
Quotient stuff in HOL a little.
Cheers,
Florian
--
PGP available:
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Quotient_Lifting.thy
Description: application/extension-thy
Quotient_Type_Definition.thy
Description: application/extension-thy
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