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Make SepCancel more conservative

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This commit is contained in:
Adam Chlipala 2016-05-01 18:53:25 -04:00
parent 8c67fc5468
commit 035bfa57ee
1 changed files with 16 additions and 6 deletions
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20
SepCancel.v
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@ -329,7 +329,8 @@ Module Make(Import S : SEP).
Ltac cancel1 :=
match goal with
| [ |- ?p ===> ?q ] =>
forAllAtoms p ltac:(fun p0 =>
(is_var q; fail 2)
|| forAllAtoms p ltac:(fun p0 =>
(let H := fresh in assert (H : try_me_first p0) by eauto; clear H);
sendToBack p0;
forAllAtoms q ltac:(fun q0 =>
@ -345,7 +346,8 @@ Module Make(Import S : SEP).
| _ => apply himp_refl
end
| [ |- ?p ===> ?q ] =>
forAllAtoms p ltac:(fun p0 =>
(is_var q; fail 2)
|| forAllAtoms p ltac:(fun p0 =>
sendToBack p0;
forAllAtoms q ltac:(fun q0 =>
sendToBack q0;
@ -359,7 +361,7 @@ Module Make(Import S : SEP).
| [ |- _ ===> ?Q ] => is_evar Q; set Q
| [ |- context[star ?P _] ] => is_evar P; set P
| [ |- context[star _ ?Q] ] => is_evar Q; set Q
| [ |- _ ===> (exists v, _ * ?R v) ] => is_evar R; set R
| [ |- _ ===> exists v, _ * ?R v ] => is_evar R; set R
end.
Ltac restore_evars :=
@ -425,11 +427,15 @@ Module Make(Import S : SEP).
quantifyOverThem vars P k).
Ltac basic_cancel :=
normalize; repeat cancel1; intuition eassumption.
normalize; repeat cancel1; repeat match goal with
| [ H : _ /\ _ |- _ ] => destruct H
| [ |- _ /\ _ ] => split
end; eassumption.
Ltac cancel := hide_evars; normalize; repeat cancel1; restore_evars;
repeat match goal with
| [ H : True |- _ ] => clear H
| [ H : ?P, H' : ?P |- _ ] => clear H'
end;
try match goal with
| [ |- _ ===> ?p * ?q ] =>
@ -472,5 +478,9 @@ Module Make(Import S : SEP).
basic_cancel
end)
| [ |- _ ===> _ ] => intuition (try congruence)
end; intuition idtac.
end; intuition idtac;
repeat match goal with
| [ H : True |- _ ] => clear H
| [ H : ?P, H' : ?P |- _ ] => clear H'
end.
End Make.