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Commit e354bede authored by Ralf Jung's avatar Ralf Jung
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New notation for Texan triple postconditions: Use 'RET' as keyword to indicate the return value 

This should make theme asier to parse, "{{{ v, v; l |-> v }}}" looks rather funny.
parent 8d2d3ac3
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heap_lang/heap.v
View file @ e354bede
......@@ -122,7 +122,7 @@ Section heap.
(** Weakest precondition *)
Lemma wp_alloc E e v :
to_val e = Some v → nclose heapN ⊆ E →
{{{ heap_ctx }}} Alloc e @ E {{{ l; LitV (LitLoc l), l ↦ v }}}.
{{{ heap_ctx }}} Alloc e @ E {{{ l, RET LitV (LitLoc l); l ↦ v }}}.
Proof.
iIntros (<-%of_to_val ? Φ) "#Hinv HΦ". rewrite /heap_ctx.
iMod (auth_empty heap_name) as "Ha".
......@@ -137,7 +137,7 @@ Section heap.
Lemma wp_load E l q v :
nclose heapN ⊆ E →
{{{ heap_ctx ★ ▷ l ↦{q} v }}} Load (Lit (LitLoc l)) @ E
{{{; v, l ↦{q} v }}}.
{{{ RET v; l ↦{q} v }}}.
Proof.
iIntros (? Φ) "[#Hinv >Hl] HΦ".
rewrite /heap_ctx heap_mapsto_eq /heap_mapsto_def.
......@@ -150,7 +150,7 @@ Section heap.
Lemma wp_store E l v' e v :
to_val e = Some v → nclose heapN ⊆ E →
{{{ heap_ctx ★ ▷ l ↦ v' }}} Store (Lit (LitLoc l)) e @ E
{{{; LitV LitUnit, l ↦ v }}}.
{{{ RET LitV LitUnit; l ↦ v }}}.
Proof.
iIntros (<-%of_to_val ? Φ) "[#Hinv >Hl] HΦ".
rewrite /heap_ctx heap_mapsto_eq /heap_mapsto_def.
......@@ -166,7 +166,7 @@ Section heap.
Lemma wp_cas_fail E l q v' e1 v1 e2 v2 :
to_val e1 = Some v1 → to_val e2 = Some v2 → v' ≠ v1 → nclose heapN ⊆ E →
{{{ heap_ctx ★ ▷ l ↦{q} v' }}} CAS (Lit (LitLoc l)) e1 e2 @ E
{{{; LitV (LitBool false), l ↦{q} v' }}}.
{{{ RET LitV (LitBool false); l ↦{q} v' }}}.
Proof.
iIntros (<-%of_to_val <-%of_to_val ?? Φ) "[#Hinv >Hl] HΦ".
rewrite /heap_ctx heap_mapsto_eq /heap_mapsto_def.
......@@ -179,7 +179,7 @@ Section heap.
Lemma wp_cas_suc E l e1 v1 e2 v2 :
to_val e1 = Some v1 → to_val e2 = Some v2 → nclose heapN ⊆ E →
{{{ heap_ctx ★ ▷ l ↦ v1 }}} CAS (Lit (LitLoc l)) e1 e2 @ E
{{{; LitV (LitBool true), l ↦ v2 }}}.
{{{ RET LitV (LitBool true); l ↦ v2 }}}.
Proof.
iIntros (<-%of_to_val <-%of_to_val ? Φ) "[#Hinv >Hl] HΦ".
rewrite /heap_ctx heap_mapsto_eq /heap_mapsto_def.
......
heap_lang/lib/barrier/proof.v
View file @ e354bede
......@@ -92,7 +92,7 @@ Qed.
(** Actual proofs *)
Lemma newbarrier_spec (P : iProp Σ) :
heapN ⊥ N →
{{{ heap_ctx }}} newbarrier #() {{{ l; #l, recv l P ★ send l P }}}.
{{{ heap_ctx }}} newbarrier #() {{{ l, RET #l; recv l P ★ send l P }}}.
Proof.
iIntros (HN Φ) "#? HΦ".
rewrite -wp_fupd /newbarrier /=. wp_seq. wp_alloc l as "Hl".
......@@ -117,7 +117,7 @@ Proof.
Qed.
Lemma signal_spec l P :
{{{ send l P ★ P }}} signal #l {{{; #(), True }}}.
{{{ send l P ★ P }}} signal #l {{{ RET #(); True }}}.
Proof.
rewrite /signal /send /barrier_ctx /=.
iIntros (Φ) "(Hs&HP) HΦ"; iDestruct "Hs" as (γ) "[#(%&Hh&Hsts) Hγ]". wp_let.
......@@ -133,7 +133,7 @@ Proof.
Qed.
Lemma wait_spec l P:
{{{ recv l P }}} wait #l {{{ ; #(), P }}}.
{{{ recv l P }}} wait #l {{{ RET #(); P }}}.
Proof.
rename P into R; rewrite /recv /barrier_ctx.
iIntros (Φ) "Hr HΦ"; iDestruct "Hr" as (γ P Q i) "(#(%&Hh&Hsts)&Hγ&#HQ&HQR)".
......
heap_lang/lib/counter.v
View file @ e354bede
......@@ -35,7 +35,7 @@ Section mono_proof.
Lemma newcounter_mono_spec (R : iProp Σ) :
heapN ⊥ N →
{{{ heap_ctx }}} newcounter #() {{{ l; #l, mcounter l 0 }}}.
{{{ heap_ctx }}} newcounter #() {{{ l, RET #l; mcounter l 0 }}}.
Proof.
iIntros (? Φ) "#Hh HΦ". rewrite -wp_fupd /newcounter /=. wp_seq. wp_alloc l as "Hl".
iMod (own_alloc (● (O:mnat) ⋅ ◯ (O:mnat))) as (γ) "[Hγ Hγ']"; first done.
......@@ -45,7 +45,7 @@ Section mono_proof.
Qed.
Lemma inc_mono_spec l n :
{{{ mcounter l n }}} inc #l {{{; #(), mcounter l (S n) }}}.
{{{ mcounter l n }}} inc #l {{{ RET #(); mcounter l (S n) }}}.
Proof.
iIntros (Φ) "Hl HΦ". iLöb as "IH". wp_rec.
iDestruct "Hl" as (γ) "(% & #? & #Hinv & Hγf)".
......@@ -70,7 +70,7 @@ Section mono_proof.
Qed.
Lemma read_mono_spec l j :
{{{ mcounter l j }}} read #l {{{ i; #i, ■ (j ≤ i)%nat ∧ mcounter l i }}}.
{{{ mcounter l j }}} read #l {{{ i, RET #i; ■ (j ≤ i)%nat ∧ mcounter l i }}}.
Proof.
iIntros (ϕ) "Hc HΦ". iDestruct "Hc" as (γ) "(% & #? & #Hinv & Hγf)".
rewrite /read /=. wp_let. iInv N as (c) ">[Hγ Hl]" "Hclose". wp_load.
......@@ -112,7 +112,7 @@ Section contrib_spec.
Lemma newcounter_contrib_spec (R : iProp Σ) :
heapN ⊥ N →
{{{ heap_ctx }}} newcounter #()
{{{ γ l; #l, ccounter_ctx γ l ★ ccounter γ 1 0 }}}.
{{{ γ l, RET #l; ccounter_ctx γ l ★ ccounter γ 1 0 }}}.
Proof.
iIntros (? Φ) "#Hh HΦ". rewrite -wp_fupd /newcounter /=. wp_seq. wp_alloc l as "Hl".
iMod (own_alloc (● (Some (1%Qp, O%nat)) ⋅ ◯ (Some (1%Qp, 0%nat))))
......@@ -124,7 +124,7 @@ Section contrib_spec.
Lemma inc_contrib_spec γ l q n :
{{{ ccounter_ctx γ l ★ ccounter γ q n }}} inc #l
{{{; #(), ccounter γ q (S n) }}}.
{{{ RET #(); ccounter γ q (S n) }}}.
Proof.
iIntros (Φ) "(#(%&?&?) & Hγf) HΦ". iLöb as "IH". wp_rec.
wp_bind (! _)%E. iInv N as (c) ">[Hγ Hl]" "Hclose".
......@@ -145,7 +145,7 @@ Section contrib_spec.
Lemma read_contrib_spec γ l q n :
{{{ ccounter_ctx γ l ★ ccounter γ q n }}} read #l
{{{ c; #c, ■ (n ≤ c)%nat ∧ ccounter γ q n }}}.
{{{ c, RET #c; ■ (n ≤ c)%nat ∧ ccounter γ q n }}}.
Proof.
iIntros (Φ) "(#(%&?&?) & Hγf) HΦ".
rewrite /read /=. wp_let. iInv N as (c) ">[Hγ Hl]" "Hclose". wp_load.
......@@ -157,7 +157,7 @@ Section contrib_spec.
Lemma read_contrib_spec_1 γ l n :
{{{ ccounter_ctx γ l ★ ccounter γ 1 n }}} read #l
{{{ n; #n, ccounter γ 1 n }}}.
{{{ n, RET #n; ccounter γ 1 n }}}.
Proof.
iIntros (Φ) "(#(%&?&?) & Hγf) HΦ".
rewrite /read /=. wp_let. iInv N as (c) ">[Hγ Hl]" "Hclose". wp_load.
......
heap_lang/lib/lock.v
View file @ e354bede
......@@ -18,11 +18,11 @@ Structure lock Σ `{!heapG Σ} := Lock {
(* -- operation specs -- *)
newlock_spec N (R : iProp Σ) :
heapN ⊥ N →
{{{ heap_ctx ★ R }}} newlock #() {{{ lk γ; lk, is_lock N γ lk R }}};
{{{ heap_ctx ★ R }}} newlock #() {{{ lk γ, RET lk; is_lock N γ lk R }}};
acquire_spec N γ lk R :
{{{ is_lock N γ lk R }}} acquire lk {{{; #(), locked γ ★ R }}};
{{{ is_lock N γ lk R }}} acquire lk {{{ RET #(); locked γ ★ R }}};
release_spec N γ lk R :
{{{ is_lock N γ lk R ★ locked γ ★ R }}} release lk {{{; #(), True }}}
{{{ is_lock N γ lk R ★ locked γ ★ R }}} release lk {{{ RET #(); True }}}
}.
Arguments newlock {_ _} _.
......
heap_lang/lib/par.v
View file @ e354bede
......@@ -16,6 +16,10 @@ Global Opaque par.
Section proof.
Context `{!heapG Σ, !spawnG Σ}.
(* Notice that this allows us to strip a later *after* the two Ψ have been
brought together. That is strictly stronger than first stripping a later
and then merging them, as demonstrated by [tests/joining_existentials.v].
This is why these are not Texan triples. *)
Lemma par_spec (Ψ1 Ψ2 : val → iProp Σ) e (f1 f2 : val) (Φ : val → iProp Σ) :
to_val e = Some (f1,f2)%V →
(heap_ctx ★ WP f1 #() {{ Ψ1 }} ★ WP f2 #() {{ Ψ2 }} ★
......
heap_lang/lib/spawn.v
View file @ e354bede
......@@ -49,7 +49,7 @@ Proof. solve_proper. Qed.
Lemma spawn_spec (Ψ : val → iProp Σ) e (f : val) :
to_val e = Some f →
heapN ⊥ N →
{{{ heap_ctx ★ WP f #() {{ Ψ }} }}} spawn e {{{ l; #l, join_handle l Ψ }}}.
{{{ heap_ctx ★ WP f #() {{ Ψ }} }}} spawn e {{{ l, RET #l; join_handle l Ψ }}}.
Proof.
iIntros (<-%of_to_val ? Φ) "(#Hh & Hf) HΦ". rewrite /spawn /=.
wp_let. wp_alloc l as "Hl". wp_let.
......@@ -64,7 +64,7 @@ Proof.
Qed.
Lemma join_spec (Ψ : val → iProp Σ) l :
{{{ join_handle l Ψ }}} join #l {{{ v; v, Ψ v }}}.
{{{ join_handle l Ψ }}} join #l {{{ v, RET v; Ψ v }}}.
Proof.
rewrite /join_handle; iIntros (Φ) "[% H] HΦ". iDestruct "H" as (γ) "(#?&Hγ&#?)".
iLöb as "IH". wp_rec. wp_bind (! _)%E. iInv N as (v) "[Hl Hinv]" "Hclose".
......
heap_lang/lib/spin_lock.v
View file @ e354bede
......@@ -47,7 +47,7 @@ Section proof.
Lemma newlock_spec (R : iProp Σ):
heapN ⊥ N →
{{{ heap_ctx ★ R }}} newlock #() {{{ lk γ; lk, is_lock γ lk R }}}.
{{{ heap_ctx ★ R }}} newlock #() {{{ lk γ, RET lk; is_lock γ lk R }}}.
Proof.
iIntros (? Φ) "[#Hh HR] HΦ". rewrite -wp_fupd /newlock /=.
wp_seq. wp_alloc l as "Hl".
......@@ -59,7 +59,7 @@ Section proof.
Lemma try_acquire_spec γ lk R :
{{{ is_lock γ lk R }}} try_acquire lk
{{{b; #b, if b is true then locked γ ★ R else True }}}.
{{{ b, RET #b; if b is true then locked γ ★ R else True }}}.
Proof.
iIntros (Φ) "#Hl HΦ". iDestruct "Hl" as (l) "(% & #? & % & #?)". subst.
wp_rec. iInv N as ([]) "[Hl HR]" "Hclose".
......@@ -71,7 +71,7 @@ Section proof.
Qed.
Lemma acquire_spec γ lk R :
{{{ is_lock γ lk R }}} acquire lk {{{; #(), locked γ ★ R }}}.
{{{ is_lock γ lk R }}} acquire lk {{{ RET #(); locked γ ★ R }}}.
Proof.
iIntros (Φ) "#Hl HΦ". iLöb as "IH". wp_rec.
wp_apply (try_acquire_spec with "Hl"). iIntros ([]).
......@@ -80,7 +80,7 @@ Section proof.
Qed.
Lemma release_spec γ lk R :
{{{ is_lock γ lk R ★ locked γ ★ R }}} release lk {{{; #(), True }}}.
{{{ is_lock γ lk R ★ locked γ ★ R }}} release lk {{{ RET #(); True }}}.
Proof.
iIntros (Φ) "(Hlock & Hlocked & HR) HΦ".
iDestruct "Hlock" as (l) "(% & #? & % & #?)". subst.
......
heap_lang/lib/ticket_lock.v
View file @ e354bede
......@@ -76,7 +76,7 @@ Section proof.
Lemma newlock_spec (R : iProp Σ) :
heapN ⊥ N →
{{{ heap_ctx ★ R }}} newlock #() {{{ lk γ; lk, is_lock γ lk R }}}.
{{{ heap_ctx ★ R }}} newlock #() {{{ lk γ, RET lk; is_lock γ lk R }}}.
Proof.
iIntros (HN Φ) "(#Hh & HR) HΦ". rewrite -wp_fupd /newlock /=.
wp_seq. wp_alloc lo as "Hlo". wp_alloc ln as "Hln".
......@@ -89,7 +89,7 @@ Section proof.
Qed.
Lemma wait_loop_spec γ lk x R :
{{{ issued γ lk x R }}} wait_loop #x lk {{{; #(), locked γ ★ R }}}.
{{{ issued γ lk x R }}} wait_loop #x lk {{{ RET #(); locked γ ★ R }}}.
Proof.
iIntros (Φ) "Hl HΦ". iDestruct "Hl" as (lo ln) "(% & #? & % & #? & Ht)".
iLöb as "IH". wp_rec. subst. wp_let. wp_proj. wp_bind (! _)%E.
......@@ -110,7 +110,7 @@ Section proof.
Qed.
Lemma acquire_spec γ lk R :
{{{ is_lock γ lk R }}} acquire lk {{{; #(), locked γ ★ R }}}.
{{{ is_lock γ lk R }}} acquire lk {{{ RET #(); locked γ ★ R }}}.
Proof.
iIntros (ϕ) "Hl HΦ". iDestruct "Hl" as (lo ln) "(% & #? & % & #?)".
iLöb as "IH". wp_rec. wp_bind (! _)%E. subst. wp_proj.
......@@ -141,7 +141,7 @@ Section proof.
Qed.
Lemma release_spec γ lk R :
{{{ is_lock γ lk R ★ locked γ ★ R }}} release lk {{{; #(), True }}}.
{{{ is_lock γ lk R ★ locked γ ★ R }}} release lk {{{ RET #(); True }}}.
Proof.
iIntros (Φ) "(Hl & Hγ & HR) HΦ".
iDestruct "Hl" as (lo ln) "(% & #? & % & #?)"; subst.
......
heap_lang/lifting.v
View file @ e354bede
......@@ -48,7 +48,7 @@ Proof. exact: weakestpre.wp_bind. Qed.
(** Base axioms for core primitives of the language: Stateful reductions. *)
Lemma wp_alloc_pst E σ v :
{{{ ▷ ownP σ }}} Alloc (of_val v) @ E
{{{ l; LitV (LitLoc l), σ !! l = None ∧ ownP (<[l:=v]>σ) }}}.
{{{ l, RET LitV (LitLoc l); σ !! l = None ∧ ownP (<[l:=v]>σ) }}}.
Proof.
iIntros (Φ) "HP HΦ".
iApply (wp_lift_atomic_head_step (Alloc (of_val v)) σ); eauto.
......@@ -59,7 +59,7 @@ Qed.
Lemma wp_load_pst E σ l v :
σ !! l = Some v →
{{{ ▷ ownP σ }}} Load (Lit (LitLoc l)) @ E {{{; v, ownP σ }}}.
{{{ ▷ ownP σ }}} Load (Lit (LitLoc l)) @ E {{{ RET v; ownP σ }}}.
Proof.
intros ? Φ. apply (wp_lift_atomic_det_head_step' σ v σ); eauto.
intros; inv_head_step; eauto.
......@@ -68,7 +68,7 @@ Qed.
Lemma wp_store_pst E σ l v v' :
σ !! l = Some v' →
{{{ ▷ ownP σ }}} Store (Lit (LitLoc l)) (of_val v) @ E
{{{; LitV LitUnit, ownP (<[l:=v]>σ) }}}.
{{{ RET LitV LitUnit; ownP (<[l:=v]>σ) }}}.
Proof.
intros. apply (wp_lift_atomic_det_head_step' σ (LitV LitUnit) (<[l:=v]>σ)); eauto.
intros; inv_head_step; eauto.
......@@ -77,7 +77,7 @@ Qed.
Lemma wp_cas_fail_pst E σ l v1 v2 v' :
σ !! l = Some v' → v' ≠ v1 →
{{{ ▷ ownP σ }}} CAS (Lit (LitLoc l)) (of_val v1) (of_val v2) @ E
{{{; LitV $ LitBool false, ownP σ }}}.
{{{ RET LitV $ LitBool false; ownP σ }}}.
Proof.
intros. apply (wp_lift_atomic_det_head_step' σ (LitV $ LitBool false) σ); eauto.
intros; inv_head_step; eauto.
......@@ -86,7 +86,7 @@ Qed.
Lemma wp_cas_suc_pst E σ l v1 v2 :
σ !! l = Some v1 →
{{{ ▷ ownP σ }}} CAS (Lit (LitLoc l)) (of_val v1) (of_val v2) @ E
{{{; LitV $ LitBool true, ownP (<[l:=v2]>σ) }}}.
{{{ RET LitV $ LitBool true; ownP (<[l:=v2]>σ) }}}.
Proof.
intros. apply (wp_lift_atomic_det_head_step' σ (LitV $ LitBool true)
(<[l:=v2]>σ)); eauto.
......
program_logic/ectx_lifting.v
View file @ e354bede
......@@ -65,7 +65,7 @@ Lemma wp_lift_atomic_det_head_step' {E e1} σ1 v2 σ2 :
head_reducible e1 σ1 →
(∀ e2' σ2' efs', head_step e1 σ1 e2' σ2' efs' →
σ2 = σ2' ∧ to_val e2' = Some v2 ∧ [] = efs') →
{{{ ▷ ownP σ1 }}} e1 @ E {{{; v2, ownP σ2 }}}.
{{{ ▷ ownP σ1 }}} e1 @ E {{{ RET v2; ownP σ2 }}}.
Proof.
intros. rewrite -(wp_lift_atomic_det_head_step σ1 v2 σ2 []); [|done..].
rewrite big_sepL_nil right_id. by apply uPred.wand_intro_r.
......
program_logic/weakestpre.v
View file @ e354bede
......@@ -68,43 +68,43 @@ Notation "'WP' e {{ v , Q } }" := (wp ⊤ e%E (λ v, Q))
format "'WP' e {{ v , Q } }") : uPred_scope.
(* Texan triples *)
Notation "'{{{' P } } } e {{{ x .. y ; pat , Q } } }" :=
Notation "'{{{' P } } } e {{{ x .. y , 'RET' pat ; Q } } }" :=
(□ ∀ Φ,
P -★ ▷ (∀ x, .. (∀ y, Q -★ Φ pat%V) .. ) -★ WP e {{ Φ }})%I
(at level 20, x closed binder, y closed binder,
format "{{{ P } } } e {{{ x .. y ; pat , Q } } }") : uPred_scope.
Notation "'{{{' P } } } e @ E {{{ x .. y ; pat , Q } } }" :=
format "{{{ P } } } e {{{ x .. y , RET pat ; Q } } }") : uPred_scope.
Notation "'{{{' P } } } e @ E {{{ x .. y , 'RET' pat ; Q } } }" :=
(□ ∀ Φ,
P -★ ▷ (∀ x, .. (∀ y, Q -★ Φ pat%V) .. ) -★ WP e @ E {{ Φ }})%I
(at level 20, x closed binder, y closed binder,
format "{{{ P } } } e @ E {{{ x .. y ; pat , Q } } }") : uPred_scope.
Notation "'{{{' P } } } e {{{ ; pat , Q } } }" :=
format "{{{ P } } } e @ E {{{ x .. y , RET pat ; Q } } }") : uPred_scope.
Notation "'{{{' P } } } e {{{ 'RET' pat ; Q } } }" :=
(□ ∀ Φ, P -★ ▷ (Q -★ Φ pat%V) -★ WP e {{ Φ }})%I
(at level 20,
format "{{{ P } } } e {{{ ; pat , Q } } }") : uPred_scope.
Notation "'{{{' P } } } e @ E {{{ ; pat , Q } } }" :=
format "{{{ P } } } e {{{ RET pat ; Q } } }") : uPred_scope.
Notation "'{{{' P } } } e @ E {{{ 'RET' pat ; Q } } }" :=
(□ ∀ Φ, P -★ ▷ (Q -★ Φ pat%V) -★ WP e @ E {{ Φ }})%I
(at level 20,
format "{{{ P } } } e @ E {{{ ; pat , Q } } }") : uPred_scope.
format "{{{ P } } } e @ E {{{ RET pat ; Q } } }") : uPred_scope.
Notation "'{{{' P } } } e {{{ x .. y ; pat , Q } } }" :=
Notation "'{{{' P } } } e {{{ x .. y , 'RET' pat ; Q } } }" :=
(∀ Φ : _ → uPred _,
P ⊢ ▷ (∀ x, .. (∀ y, Q -★ Φ pat%V) .. ) -★ WP e {{ Φ }})
(at level 20, x closed binder, y closed binder,
format "{{{ P } } } e {{{ x .. y ; pat , Q } } }") : C_scope.
Notation "'{{{' P } } } e @ E {{{ x .. y ; pat , Q } } }" :=
format "{{{ P } } } e {{{ x .. y , RET pat ; Q } } }") : C_scope.
Notation "'{{{' P } } } e @ E {{{ x .. y , 'RET' pat ; Q } } }" :=
(∀ Φ : _ → uPred _,
P ⊢ ▷ (∀ x, .. (∀ y, Q -★ Φ pat%V) .. ) -★ WP e @ E {{ Φ }})
(at level 20, x closed binder, y closed binder,
format "{{{ P } } } e @ E {{{ x .. y ; pat , Q } } }") : C_scope.
Notation "'{{{' P } } } e {{{ ; pat , Q } } }" :=
format "{{{ P } } } e @ E {{{ x .. y , RET pat ; Q } } }") : C_scope.
Notation "'{{{' P } } } e {{{ 'RET' pat ; Q } } }" :=
(∀ Φ : _ → uPred _, P ⊢ ▷ (Q -★ Φ pat%V) -★ WP e {{ Φ }})
(at level 20,
format "{{{ P } } } e {{{ ; pat , Q } } }") : C_scope.
Notation "'{{{' P } } } e @ E {{{ ; pat , Q } } }" :=
format "{{{ P } } } e {{{ RET pat ; Q } } }") : C_scope.
Notation "'{{{' P } } } e @ E {{{ 'RET' pat ; Q } } }" :=
(∀ Φ : _ → uPred _, P ⊢ ▷ (Q -★ Φ pat%V) -★ WP e @ E {{ Φ }})
(at level 20,
format "{{{ P } } } e @ E {{{ ; pat , Q } } }") : C_scope.
format "{{{ P } } } e @ E {{{ RET pat ; Q } } }") : C_scope.
Section wp.
Context `{irisG Λ Σ}.
......
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