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[Merged by Bors] - fix(Algebra/BigOperators/Group/Finset): Add missing binder annotation with pp.analyze in Finset.sum #33070

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[Merged by Bors] - fix(Algebra/BigOperators/Group/Finset): Add missing binder annotation with pp.analyze in Finset.sum #33070

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6d62956
Fix missing binder annotation with pp.analyze in Finset.sum
MrQubo Dec 19, 2025
c6b3db8
tests
MrQubo Dec 19, 2025
0e38ca9
Use getPPOption
MrQubo Dec 19, 2025
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4 changes: 2 additions & 2 deletions Mathlib/Algebra/BigOperators/Group/Finset/Defs.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -265,7 +265,7 @@ to show the domain type when the product is over `Finset.univ`. -/
whenPPOption getPPNotation <| withOverApp 5 do
let #[_, _, _, _, f] := (← getExpr).getAppArgs | failure
guard f.isLambda
let ppDomain ← getPPOption getPPFunBinderTypes
let ppDomain ← withAppArg <| getPPOption getPPFunBinderTypes
let (i, body) ← withAppArg <| withBindingBodyUnusedName fun i => do
return (⟨i⟩, ← delab)
let res ← withNaryArg 3 <| delabFinsetArg i
Expand Down Expand Up @@ -296,7 +296,7 @@ to show the domain type when the sum is over `Finset.univ`. -/
whenPPOption getPPNotation <| withOverApp 5 do
let #[_, _, _, _, f] := (← getExpr).getAppArgs | failure
guard f.isLambda
let ppDomain ← getPPOption getPPFunBinderTypes
let ppDomain ← withAppArg <| getPPOption getPPFunBinderTypes
let (i, body) ← withAppArg <| withBindingBodyUnusedName fun i => do
return ((⟨i⟩ : Ident), ← delab)
let res ← withNaryArg 3 <| delabFinsetArg i
Expand Down
61 changes: 61 additions & 0 deletions MathlibTest/BigOps.lean
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Original file line number Diff line number Diff line change
@@ -1,4 +1,5 @@
import Mathlib.Algebra.BigOperators.Group.Finset.Basic
import Mathlib.Data.Fintype.Basic

section
variable {ι M : Type*} [CommMonoid M] [AddCommMonoid M] [Fintype ι] {s : Finset ι} {p : ι → Prop}
Expand Down Expand Up @@ -62,4 +63,64 @@ set_option pp.funBinderTypes false
#guard_msgs in
#check Finset.prod {j | p j} fun i ↦ f i

/-! ### Big operators over a finset with `pp.analyze` on -/

/-- info: ∑ i, i.toNat : ℕ -/
#guard_msgs in
#check ∑ i : Fin 3, i.toNat

/-- info: ∏ i, i.toNat : ℕ -/
#guard_msgs in
#check ∏ i : Fin 3, i.toNat

/-- info: ∑ i : Fin 3, i.toNat : ℕ -/
#guard_msgs in
set_option pp.analyze true in
#check ∑ i : Fin 3, i.toNat

/-- info: ∏ i : Fin 3, i.toNat : ℕ -/
#guard_msgs in
set_option pp.analyze true in
#check ∏ i : Fin 3, i.toNat

/-- info: ∑ i ∈ s, f i : M -/
#guard_msgs in
set_option pp.analyze true in
#check Finset.sum s fun i ↦ f i

/-- info: ∏ i ∈ s, f i : M -/
#guard_msgs in
set_option pp.analyze true in
#check Finset.prod s fun i ↦ f i

/-- info: ∑ i ∈ s with p i, f i : M -/
#guard_msgs in
set_option pp.analyze true in
#check Finset.sum {j ∈ s | p j} fun i ↦ f i

/-- info: ∏ i ∈ s with p i, f i : M -/
#guard_msgs in
set_option pp.analyze true in
#check Finset.prod {j ∈ s | p j} fun i ↦ f i

/-- info: ∑ i : ι, f i : M -/
#guard_msgs in
set_option pp.analyze true in
#check Finset.sum Finset.univ fun i ↦ f i

/-- info: ∏ i : ι, f i : M -/
#guard_msgs in
set_option pp.analyze true in
#check Finset.prod Finset.univ fun i ↦ f i

/-- info: ∑ i : ι with p i, f i : M -/
#guard_msgs in
set_option pp.analyze true in
#check Finset.sum {j | p j} fun i ↦ f i

/-- info: ∏ i : ι with p i, f i : M -/
#guard_msgs in
set_option pp.analyze true in
#check Finset.prod {j | p j} fun i ↦ f i

end
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