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Fix handling of opaque primitive projections in Evarconv
This fixes #17774.
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- **Fixed:** | ||
ensure that opaque primitive projections are correctly handled by "Evarconv" | ||
unification | ||
(`#17788 <https://github.com/coq/coq/pull/17788>`_, | ||
fixes `#17774 <https://github.com/coq/coq/issues/17774>`_, | ||
by Rodolphe Lepigre). |
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Require Import Ltac2.Ltac2. | ||
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#[projections(primitive)] | ||
Record r (n : nat) := { w : Prop -> Prop -> Prop }. | ||
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Class C (P : Prop) := {}. | ||
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Import Printf. | ||
Set Printing Primitive Projection Parameters. | ||
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Goal forall (v : r 0) (Q P : Prop), C (v.(w _) P Q). | ||
Proof. | ||
intros. | ||
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(* Succeeds before and after this PR. *) | ||
Succeed lazy_match! goal with | ||
| [ |- ?g ] => | ||
let t := open_constr:(C (v.(w _) _ _)) in | ||
Unification.unify (TransparentState.current ()) g t | ||
end. | ||
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#[local] Opaque w. | ||
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(* Succeeds only after #17788. *) | ||
Succeed lazy_match! goal with | ||
| [ |- ?g ] => | ||
let t := open_constr:(C (v.(w _) _ _)) in | ||
Unification.unify (TransparentState.current ()) g t | ||
end. | ||
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(* Succeeds only after #17788. *) | ||
Succeed lazy_match! goal with | ||
| [ |- ?g ] => | ||
let t := open_constr:(w _) in | ||
let t := open_constr:(C ($t v _ _)) in | ||
(*printf "Term: %t" t;*) | ||
Unification.unify (TransparentState.current ()) g t | ||
end. | ||
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(* Succeeds only after #17788. *) | ||
Succeed lazy_match! goal with | ||
| [ |- ?g ] => | ||
let t := open_constr:(w _) in | ||
let t := open_constr:(C ($t v _ _)) in | ||
(*printf "Term: %t" t;*) | ||
Unification.unify (TransparentState.current ()) g t | ||
end. | ||
Abort. |