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[Frama-c-discuss] complete/disjoint behaviors and unnamed behaviors

  • Subject: [Frama-c-discuss] complete/disjoint behaviors and unnamed behaviors
  • From: dcok at grammatech.com (David R. Cok)
  • Date: Tue, 05 May 2015 07:19:12 -0400
  • In-reply-to: <CA+yPOVig=FwU1bAcLPJpab1eo+=7tGsPPgqZUN_Kq7M6yR_EGA@mail.gmail.com>
  • References: <1898363443.1327848.1430768130306.JavaMail.yahoo@mail.yahoo.com> <CA+yPOVig=FwU1bAcLPJpab1eo+=7tGsPPgqZUN_Kq7M6yR_EGA@mail.gmail.com>
Vergile - thanks for your reply

You are correct of course. I did not mean that the alternative 
desugaring was equivalent, merely that it was an alternate way to 
desugar. One could envision seeing the 'global' assigns and ensures as 
merely a way to factor out of the named behaviors any clauses that were 
common to all of them, rather than as implicitly defining an additional 
behavior.

- David

On 5/5/2015 2:39 AM, Virgile Prevosto wrote:
> Actually, this is true for the ensures clauses, but not for the
> assigns, as adding the global assigns GA to the assigns BA of a
> behavior b
> would mean that when b is active you allow the function to modify both
> GA and BA, leading to a more liberal assigns clause than without GA if
> BA is not a subset (modulo aliasing for added fun) of GA.