Skip to content

[Merged by Bors] - fix(Translate): beta reduce proof before translation #37756

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
JovanGerb wants to merge 1 commit into from
Closed

[Merged by Bors] - fix(Translate): beta reduce proof before translation #37756

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 3 additions & 0 deletions Mathlib/Tactic/Translate/Core.lean
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -460,6 +460,9 @@ where
return e
visitApp (e : Expr) := e.withApp fun f args ↦ do
let env ← getEnv
if f.isLambda && !args.isEmpty then
if ← isProof f then
return ← visit (f.beta args)
match f with
| .proj n i b =>
let some info := getStructureInfo? env n |
Expand Down
5 changes: 5 additions & 0 deletions MathlibTest/ToDual.lean
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -382,3 +382,8 @@ info: eq_of_max_of_min {α : Type} [PartialOrder α] (a b : α) (hmin : ∀ (x :
-/
#guard_msgs in
#check eq_of_max_of_min

-- Test that the heuristic applies even when proofs are beta expanded
@[to_dual (dont_translate := β) le_of_lt_and_le_of_lt']
theorem le_of_lt_and_le_of_lt {β} [Preorder β] (a b : α) (c d : β) : (a < b → a ≤ b) ∧ (c < d → c ≤ d) :=
⟨le_of_lt, (fun γ [Preorder γ] (c d : γ) ↦ @le_of_lt γ _ c d) β c d⟩
Loading