[isabelle-dev] Typerep again

Florian Haftmann florian.haftmann at informatik.tu-muenchen.de
Tue Feb 10 06:58:38 CET 2009

Hi Brian,

>> Our current policy is the Plain, Main and Complex_Main are either
>> ancestors or descendants of any theory.
> OK, the requirement for Plain I can understand. For Main, it doesn't
> seem too unreasonable, assuming it's necessary (since most theory files
> import Main anyway).
> But Complex_Main? Are you serious? Implementing this policy would
> require changes to a LOT of theories: HOLCF, every subdirectory of
> src/HOL, all the AFP contributions, all user-created Isabelle theories
> in the entire world that import Main, etc.

The "any" here is supposed to range over all theories in the HOL image;
 indeed Complex_Main need not be taken too serious since the fragile
tool bootstraps are already finished with Main.




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