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Adapt to rocq-prover/rocq#20809 (use evar created by evar tactic instead of hard-coded name in unfold_post) #834

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Merged
andrew-appel merged 1 commit into from
Aug 18, 2025
Merged

Adapt to rocq-prover/rocq#20809 (use evar created by evar tactic instead of hard-coded name in unfold_post) #834

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10 changes: 8 additions & 2 deletions floyd/forward.v
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Original file line number Diff line number Diff line change
Expand Up @@ -926,10 +926,16 @@ end.
Ltac cancel_for_forward_call := cancel_for_evar_frame.
Ltac default_cancel_for_forward_call := cancel_for_evar_frame.

(* Work-around to obtain the evar that was created by the `evar` tactic.
See PR #834. *)
Ltac evar_value x := (eval unfold x in x).

Ltac unfold_post := match goal with |- ?Post = _ => let A := fresh "A" in let B := fresh "B" in first
[evar (A : Type); evar (B : A -> environ -> mpred); unify Post (@exp _ _ ?A ?B);
[evar (A : Type); evar (B : A -> environ -> mpred); let A_evar := (evar_value A) in let B_evar := (evar_value B) in
unify Post (@exp _ _ A_evar B_evar);
change Post with (@exp _ _ A B); subst A B |
evar (A : list Prop); evar (B : environ -> mpred); unify Post (PROPx ?A ?B);
evar (A : list Prop); evar (B : environ -> mpred); let A_evar := (evar_value A) in let B_evar := (evar_value B) in
unify Post (PROPx A_evar B_evar);
change Post with (PROPx A B); subst A B | idtac] end.


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