 13 Jun, 2017 3 commits


Robbert Krebbers authored

Robbert Krebbers authored

Robbert Krebbers authored
It can be derived, thanks to Ales for noticing!

 12 Jun, 2017 1 commit


Robbert Krebbers authored

 08 Jun, 2017 1 commit


Robbert Krebbers authored

 12 May, 2017 2 commits


Robbert Krebbers authored

Robbert Krebbers authored

 13 Apr, 2017 1 commit


Robbert Krebbers authored
This enables things like `iSpecialize ("H2" with "H1") in the below: "H1" : P □ "H2" : □ P ∗ Q ∗ R

 11 Apr, 2017 2 commits
 07 Apr, 2017 2 commits


Ralf Jung authored

JacquesHenri Jourdan authored

 05 Apr, 2017 1 commit


JacquesHenri Jourdan authored

 04 Apr, 2017 1 commit


JacquesHenri Jourdan authored

 27 Mar, 2017 1 commit


Robbert Krebbers authored

 24 Mar, 2017 5 commits


Robbert Krebbers authored
This commit fixes the issues that refolding of big operators did not work nicely in the proof mode, e.g., given: Goal forall M (P : nat → uPred M) l, ([∗ list] x ∈ 10 :: l, P x) ∗ True. Proof. iIntros (M P l) "[H1 H2]". We got: "H1" : P 10 "H2" : (fix big_opL (M0 : ofeT) (o : M0 → M0 → M0) (H : Monoid o) (A : Type) (f : nat → A → M0) (xs : list A) {struct xs} : M0 := match xs with  [] => monoid_unit  x :: xs0 => o (f 0 x) (big_opL M0 o H A (λ n : nat, f (S n)) xs0) end) (uPredC M) uPred_sep uPred.uPred_sep_monoid nat (λ _ x : nat, P x) l ∗ True The problem here is that proof mode looked for an instance of `IntoAnd` for `[∗ list] x ∈ 10 :: l, P x` and then applies the instance for separating conjunction without folding back the fixpoint. This problem is not specific to the Iris proof mode, but more of a general problem of Coq's `apply`, for example: Goal forall x l, Forall (fun _ => True) (map S (x :: l)). Proof. intros x l. constructor. Gives: Forall (λ _ : nat, True) ((fix map (l0 : list nat) : list nat := match l0 with  [] => []  a :: t => S a :: map t end) l) This commit fixes this issue by making the big operators type class opaque and instead handle them solely via corresponding type classes instances for the proof mode tactics. Furthermore, note that we already had instances for persistence and timelessness. Those were really needed; computation did not help to establish persistence when the list in question was not a ground term. In fact, the sitation was worse, to establish persistence of `[∗ list] x ∈ 10 :: l, P x` it could either use the persistence instance of big ops directly, or use the persistency instance for `∗` first. Worst case, this can lead to an exponential blow up because of back tracking.

Robbert Krebbers authored

Robbert Krebbers authored
Instead, I have introduced a type class `Monoid` that is used by the big operators: Class Monoid {M : ofeT} (o : M → M → M) := { monoid_unit : M; monoid_ne : NonExpansive2 o; monoid_assoc : Assoc (≡) o; monoid_comm : Comm (≡) o; monoid_left_id : LeftId (≡) monoid_unit o; monoid_right_id : RightId (≡) monoid_unit o; }. Note that the operation is an argument because we want to have multiple monoids over the same type (for example, on `uPred`s we have monoids for `∗`, `∧`, and `∨`). However, we do bundle the unit because:  If we would not, the unit would appear explicitly in an implicit argument of the big operators, which confuses rewrite. By bundling the unit in the `Monoid` class it is hidden, and hence rewrite won't even see it.  The unit is unique. We could in principle have big ops over setoids instead of OFEs. However, since we do not have a canonical structure for bundled setoids, I did not go that way.

Robbert Krebbers authored
Big ops over list with a cons reduce, hence these just follow immediately from conversion.

Robbert Krebbers authored

 22 Mar, 2017 1 commit


Ralf Jung authored

 21 Mar, 2017 2 commits


Robbert Krebbers authored
This way, iSplit will work when one side is persistent.

Robbert Krebbers authored

 20 Mar, 2017 4 commits


Robbert Krebbers authored

Robbert Krebbers authored
This are useful as proofmode cannot always guess in which direction it should use ⊣⊢.

Ralf Jung authored

Ralf Jung authored

 15 Mar, 2017 7 commits


Robbert Krebbers authored

Robbert Krebbers authored

Robbert Krebbers authored
 Allow framing of persistent hypotheses below the always modality.  Allow framing of persistent hypotheses in just one branch of a disjunction.

Ralf Jung authored

Ralf Jung authored

Robbert Krebbers authored

Robbert Krebbers authored

 14 Mar, 2017 4 commits


Robbert Krebbers authored

Robbert Krebbers authored

Robbert Krebbers authored
 Support for a `//` modifier to close the goal using `done`.  Support for framing in the `[#]` specialization pattern for persistent premises, i.e. `[# $H1 $H2]`  Add new "auto framing patterns" `[$]`, `[# $]` and `>[$]` that will try to solve the premise by framing. Hypothesis that are not framed are carried over to the next goal.

Ralf Jung authored

 09 Mar, 2017 2 commits


Robbert Krebbers authored
Now, we never need to unfold LimitPreserving in LambdaRust, and hence the entails_lim tactic is no longer needed.

Robbert Krebbers authored
