Commit 2f754628 by Ralf Jung

### do not make use of wp_bind_inv unnecessarily

parent eba7e9e4
 ... ... @@ -5,15 +5,15 @@ From iris.heap_lang Require Export tactics lifting. Set Default Proof Using "Type". Import uPred. Lemma tac_wp_pure `{heapG Σ} K Δ Δ' E e1 e2 φ Φ : Lemma tac_wp_pure `{heapG Σ} Δ Δ' E e1 e2 φ Φ : PureExec φ e1 e2 → φ → IntoLaterNEnvs 1 Δ Δ' → envs_entails Δ' (WP fill K e2 @ E {{ Φ }}) → envs_entails Δ (WP fill K e1 @ E {{ Φ }}). envs_entails Δ' (WP e2 @ E {{ Φ }}) → envs_entails Δ (WP e1 @ E {{ Φ }}). Proof. rewrite /envs_entails=> ??? HΔ'. rewrite into_laterN_env_sound /=. rewrite -wp_bind HΔ' -wp_pure_step_later //. by rewrite -wp_bind_inv. rewrite HΔ' -wp_pure_step_later //. Qed. Lemma tac_wp_value `{heapG Σ} Δ E Φ e v : ... ... @@ -28,11 +28,12 @@ Tactic Notation "wp_pure" open_constr(efoc) := lazymatch goal with | |- envs_entails _ (wp ?E ?e ?Q) => reshape_expr e ltac:(fun K e' => unify e' efoc; eapply (tac_wp_pure K); [simpl; apply _ (* PureExec *) eapply tac_wp_pure; [simpl; change e with (fill K e'); apply _ (* PureExec *) |try fast_done (* The pure condition for PureExec *) |apply _ (* IntoLaters *) |simpl_subst; try wp_value_head (* new goal *)]) |simpl_subst; try wp_value_head (* new goal *) ]) || fail "wp_pure: cannot find" efoc "in" e "or" efoc "is not a reduct" | _ => fail "wp_pure: not a 'wp'" end. ... ...
 ... ... @@ -140,6 +140,19 @@ Section language. PureExec P e1 e2. Proof. intros HPE. split; intros; eapply HPE; eauto. Qed. Global Instance pure_exec_ctx K `{LanguageCtx Λ K} e1 e2 φ : PureExec φ e1 e2 → PureExec φ (K e1) (K e2). Proof. intros [Hred Hstep]. split. - intros σ ?. destruct (Hred σ) as (? & ? & ? & ?); first done. do 3 eexists. eapply fill_step. done. - intros σ ???? Hpstep. edestruct fill_step_inv as (? & ? & ?); [|exact Hpstep|]. + destruct (Hred σ) as (? & ? & ? & ?); first done. eapply val_stuck. done. + edestruct Hstep as (? & ? & ?); [done..|]. by subst. Qed. (* This is a family of frequent assumptions for PureExec *) Class IntoVal (e : expr Λ) (v : val Λ) := into_val : to_val e = Some v. ... ...
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