diff options
Diffstat (limited to 'backends/lean/Base/Utils.lean')
| -rw-r--r-- | backends/lean/Base/Utils.lean | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/backends/lean/Base/Utils.lean b/backends/lean/Base/Utils.lean index f6dc45c7..1f8f1455 100644 --- a/backends/lean/Base/Utils.lean +++ b/backends/lean/Base/Utils.lean @@ -201,6 +201,10 @@ partial def mapVisit (k : Nat → Expr → MetaM Expr) (e : Expr) : MetaM Expr : | .proj _ _ b => return e.updateProj! (← visit (i + 1) b) visit 0 e +-- Generate a fresh user name for an anonymous proposition to introduce in the +-- assumptions +def mkFreshAnonPropUserName := mkFreshUserName `_ + section Methods variable [MonadLiftT MetaM m] [MonadControlT MetaM m] [Monad m] [MonadError m] variable {a : Type} @@ -411,7 +415,7 @@ def splitDisjTac (h : Expr) (kleft kright : TacticM Unit) : TacticM Unit := do trace[Arith] "left: {inl}: {mleft}" trace[Arith] "right: {inr}: {mright}" -- Create the match expression - withLocalDeclD (← mkFreshUserName `h) hTy fun hVar => do + withLocalDeclD (← mkFreshAnonPropUserName) hTy fun hVar => do let motive ← mkLambdaFVars #[hVar] goalType let casesExpr ← mkAppOptM ``Or.casesOn #[a, b, motive, h, inl, inr] let mgoal ← getMainGoal @@ -505,8 +509,8 @@ def splitConjTac (h : Expr) (optIds : Option (Name × Name)) (k : Expr → Expr let altVarNames ← match optIds with | none => do - let id0 ← mkFreshUserName `h - let id1 ← mkFreshUserName `h + let id0 ← mkFreshAnonPropUserName + let id1 ← mkFreshAnonPropUserName pure #[{ varNames := [id0, id1] }] | some (id0, id1) => do pure #[{ varNames := [id0, id1] }] @@ -532,7 +536,7 @@ partial def splitFullConjTacAux [Inhabited α] [Nonempty α] (keepCurrentName : let ids ← do if keepCurrentName then do let cur := (← h.fvarId!.getDecl).userName - let nid ← mkFreshUserName `h + let nid ← mkFreshAnonPropUserName pure (some (cur, nid)) else pure none |