[isabelle-dev] Towards the Isabelle2014 release

Thomas Sewell thomas.sewell at nicta.com.au
Thu Jun 5 05:44:46 CEST 2014

Indeed, there is a backward compatibility mode declaration. In fixing 
things, I've been trying to use it as little as possible and as locally 
as possible. Perhaps I should be bolder.

I'm aesthetically against using the compatibility mode all over the 
place, since I feel that it's just mysterious. Of course, a lot of 
Isabelle proof scripts are a bit mysterious already.

In particular, I want to avoid ever changing the setting globally. I've 
had some bad experiences in the past with theories with differing global 
configurations, which means that the location of a tactic and the 
include graphs of theories start having subtle effects on the way the 
tactics run. It's a mess.

I've started running through the AFP, and it doesn't look too bad. I'll 
report on this again in the next few days.

Cheers all,

On 04/06/14 23:23, Lawrence Paulson wrote:
> Didn’t we agree that a “backward compatibility mode” declaration (restoring the former behaviour) would have to be available? That should make repairing legacy proofs trivial. Naturally we would like to gradually port some of these developments to do things the new way, but only some of them, and not immediately.
> Backward compatibility will be necessary for users, even if not for us.
> Larry
> On 4 Jun 2014, at 06:27, Thomas Sewell <thomas.sewell at nicta.com.au> wrote:
>> I had hoped to have the change I was making to hypothesis-substitution ready for the coming release.
>> I've got it working for all of HOL and the library, and begun looking at the AFP and at the l4.verified proofs. The HOL+library changes were easy enough, but the l4.verified changes are somewhat daunting and I haven't gotten anywhere with the AFP yet.
>> I'll have another look at it, because I'd like this to go somewhere at some point. It might have to wait for a subsequent release though.
>> Cheers,
>>     Thomas.
>> On 30/05/14 21:30, Makarius wrote:
>>> The summer is getting close, and we need to start thinking about the coming release.
>>> I am myself on vacation during most of June. On return I would like to wrap up rather quickly, so that we can publish Isabelle2014-RC0 in the second week of July, for the Isabelle tutorial at VSL2014 Vienna.  That will be still within the main Isabelle repository.
>>> The usual fork to the release repository and the regular sequence of Isabelle2014-RC1, RC2, RC3, ... will happen in the week after ITP 2014.
>>> I am myself attending the mega event at Vienna 13..19-Jul-2014. This will be also an opportunity to show me personally remaining snags, and to continue the elimination of remaining uses of Proof General.  (It is getting harder and harder to construct counter-examples to the claim that this set is already empty.)
>>>     Makarius
>>> _______________________________________________
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