1. 08 Jun, 2017 1 commit
  2. 13 Apr, 2017 1 commit
  3. 07 Apr, 2017 1 commit
  4. 21 Mar, 2017 3 commits
  5. 15 Mar, 2017 2 commits
  6. 09 Mar, 2017 1 commit
  7. 22 Feb, 2017 1 commit
    • Robbert Krebbers's avatar
      Change Hint Mode for FromAssumption. · 2cbcc992
      Robbert Krebbers authored
      There is no need to restrict the type class using Hint Mode, we have
      a default instance that will always be used first. In case of evars,
      the default instance should apply.
      
      The reason for this change is that `iAssumption` should be able to
      prove `H : ?e |- P` and `H : P |- ?e`. The former Hint Mode prevented
      it from doing that.
      2cbcc992
  8. 11 Feb, 2017 1 commit
    • Robbert Krebbers's avatar
      Improve `iSpecialize ("H" $! x1 .. xn)`. · 9ea6fa45
      Robbert Krebbers authored
      Instead of doing all the instantiations by invoking a single type
      class search, it now performs the instantiations by invoking
      individual type class searches. This a.) gives better error messages
      and b.) works when `xj` depends on `xi`.
      9ea6fa45
  9. 26 Jan, 2017 1 commit
    • Robbert Krebbers's avatar
      Fix issue #68. · 2550dff5
      Robbert Krebbers authored
      TODO: document the setup of the IntoWand and WandWeaken type classes
      and the tricks using Hint Mode.
      2550dff5
  10. 22 Jan, 2017 1 commit
  11. 05 Jan, 2017 1 commit
  12. 03 Jan, 2017 1 commit
  13. 09 Dec, 2016 1 commit
  14. 27 Nov, 2016 1 commit
  15. 22 Nov, 2016 1 commit
  16. 03 Nov, 2016 1 commit
    • Robbert Krebbers's avatar
      Use symbol ∗ for separating conjunction. · cc31476d
      Robbert Krebbers authored
      The old choice for ★ was a arbitrary: the precedence of the ASCII asterisk *
      was fixed at a wrong level in Coq, so we had to pick another symbol. The ★ was
      a random choice from a unicode chart.
      
      The new symbol ∗ (as proposed by David Swasey) corresponds better to
      conventional practise and matches the symbol we use on paper.
      cc31476d
  17. 25 Oct, 2016 5 commits
  18. 05 Oct, 2016 2 commits
  19. 19 Sep, 2016 1 commit
  20. 25 Aug, 2016 2 commits
  21. 24 Aug, 2016 2 commits
  22. 05 Aug, 2016 2 commits
    • Robbert Krebbers's avatar
    • Robbert Krebbers's avatar
      Iris 3.0: invariants and weakest preconditions encoded in the logic. · 1f589858
      Robbert Krebbers authored
      This commit features:
      
      - A simpler model. The recursive domain equation no longer involves a triple
        containing invariants, physical state and ghost state, but just ghost state.
        Invariants and physical state are encoded using (higher-order) ghost state.
      
      - (Primitive) view shifts are formalized in the logic and all properties about
        it are proven in the logic instead of the model. Instead, the core logic
        features only a notion of raw view shifts which internalizing performing frame
        preserving updates.
      
      - A better behaved notion of mask changing view shifts. In particular, we no
        longer have side-conditions on transitivity of view shifts, and we have a
        rule for introduction of mask changing view shifts |={E1,E2}=> P with
        E2 ⊆ E1 which allows to postpone performing a view shift.
      
      - The weakest precondition connective is formalized in the logic using Banach's
        fixpoint. All properties about the connective are proven in the logic instead
        of directly in the model.
      
      - Adequacy is proven in the logic and uses a primitive form of adequacy for
        uPred that only involves raw views shifts and laters.
      
      Some remarks:
      
      - I have removed binary view shifts. I did not see a way to describe all rules
        of the new mask changing view shifts using those.
      - There is no longer the need for the notion of "frame shifting assertions" and
        these are thus removed. The rules for Hoare triples are thus also stated in
        terms of primitive view shifts.
      
      TODO:
      
      - Maybe rename primitive view shift into something more sensible
      - Figure out a way to deal with closed proofs (see the commented out stuff in
        tests/heap_lang and tests/barrier_client).
      1f589858
  23. 28 Jul, 2016 1 commit
  24. 27 Jul, 2016 1 commit
  25. 25 Jul, 2016 4 commits
  26. 05 Jul, 2016 1 commit