structure Lean.CollectFVars.State : Type

• visitedExpr : Lean.ExprSet
• fvarSet : Lean.FVarIdSet
• fvarIds : Array Lean.FVarId

instance Lean.CollectFVars.instInhabitedState : Inhabited Lean.CollectFVars.State

def Lean.CollectFVars.State.add (s : Lean.CollectFVars.State) (fvarId : Lean.FVarId) : Lean.CollectFVars.State

@[inline, reducible]

abbrev Lean.CollectFVars.Visitor : Type

partial def Lean.CollectFVars.visit (e : Lean.Expr) : Lean.CollectFVars.Visitor

partial def Lean.CollectFVars.main : Lean.Expr → Lean.CollectFVars.Visitor

def Lean.collectFVars (s : Lean.CollectFVars.State) (e : Lean.Expr) : Lean.CollectFVars.State