Allow multiple arguments in `iEval .. in` and `iSimpl in`.

ProofMode.md

@@ -160,6 +160,7 @@ Rewriting / simplification
   with the resulting `P`, which in turn becomes the new proof mode goal /
   hypothesis `H`.
   Note that parentheses around `tac` are needed.
+  If `H` is a list of hypothesis, then `iEval` will perform `tac` on each of them.
 - `iSimpl` / `iSimpl in H` : performs `simpl` on the proof mode goal /
   hypothesis `H`. This is a shorthand for `iEval (simpl)`.
 

tests/proofmode.ref

@@ -101,6 +101,16 @@ Tactic failure: iSpecialize: cannot instantiate (⌜φ⌝ → P -∗ False)%I wi
   --------------------------------------∗
   ⌜S (S (S x)) = y⌝
   
+1 subgoal
+  
+  PROP : sbi
+  x, y, z : nat
+  ============================
+  "H1" : ⌜S (S (S x)) = y⌝
+  "H2" : ⌜S y = z⌝
+  --------------------------------------∗
+  ⌜S (S (S x)) = y⌝
+  
 "test_iFrame_later_1"
      : string
 1 subgoal

tests/proofmode.v

@@ -473,6 +473,11 @@ Check "test_iSimpl_in".
 Lemma test_iSimpl_in x y : ⌜ (3 + x)%nat = y ⌝ -∗ ⌜ S (S (S x)) = y ⌝ : PROP.
 Proof. iIntros "H". iSimpl in "H". Show. done. Qed.
 
+Lemma test_iSimpl_in_2 x y z :
+  ⌜ (3 + x)%nat = y ⌝ -∗ ⌜ (1 + y)%nat = z ⌝ -∗
+  ⌜ S (S (S x)) = y ⌝ : PROP.
+Proof. iIntros "H1 H2". iSimpl in "H1 H2". Show. done. Qed.
+
 Lemma test_iIntros_pure_neg : (⌜ ¬False ⌝ : PROP)%I.
 Proof. by iIntros (?). Qed.
 

theories/proofmode/ltac_tactics.v

@@ -114,13 +114,21 @@ Tactic Notation "iEval" tactic(t) :=
     [let x := fresh in intros x; t; unfold x; reflexivity
     |].
 
+Ltac iEval_go t Hs :=
+  match Hs with
+  | [] => idtac
+  | ?H :: ?Hs =>
+    let H := pretty_ident H in
+    eapply tac_eval_in with _ H _ _ _;
+      [pm_reflexivity || fail "iEval:" H "not found"
+      |let x := fresh in intros x; t; unfold x; reflexivity
+      |pm_reflexivity
+      |iEval_go t Hs]
+  end.
+
 Tactic Notation "iEval" tactic(t) "in" constr(H) :=
   iStartProof;
-  eapply tac_eval_in with _ H _ _ _;
-    [pm_reflexivity || fail "iEval:" H "not found"
-    |let x := fresh in intros x; t; unfold x; reflexivity
-    |pm_reflexivity
-    |].
+  let Hs := words H in iEval_go t Hs.
 
 Tactic Notation "iSimpl" := iEval (simpl).
 Tactic Notation "iSimpl" "in" constr(H) := iEval (simpl) in H.