inductive Lean.Meta.RecursorUnivLevelPos : Type

• motive: Lean.Meta.RecursorUnivLevelPos
• majorType: Nat → Lean.Meta.RecursorUnivLevelPos

instance Lean.Meta.instToStringRecursorUnivLevelPos : ToString Lean.Meta.RecursorUnivLevelPos

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structure Lean.Meta.RecursorInfo : Type

• recursorName : Lake.Name
• typeName : Lake.Name
• univLevelPos : List Lean.Meta.RecursorUnivLevelPos
• depElim : Bool
• recursive : Bool
• numArgs : Nat
• majorPos : Nat
• paramsPos : List (Option Nat)
• indicesPos : List Nat
• produceMotive : List Bool

def Lean.Meta.RecursorInfo.numParams (info : Lean.Meta.RecursorInfo) : Nat

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• info.numParams = info.paramsPos.length

def Lean.Meta.RecursorInfo.numIndices (info : Lean.Meta.RecursorInfo) : Nat

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• info.numIndices = info.indicesPos.length

def Lean.Meta.RecursorInfo.motivePos (info : Lean.Meta.RecursorInfo) : Nat

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• info.motivePos = info.numParams

def Lean.Meta.RecursorInfo.firstIndexPos (info : Lean.Meta.RecursorInfo) : Nat

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• info.firstIndexPos = info.majorPos - info.numIndices

def Lean.Meta.RecursorInfo.isMinor (info : Lean.Meta.RecursorInfo) (pos : Nat) : Bool

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• info.isMinor pos = if pos ≤ info.motivePos then false else if (decide (info.firstIndexPos ≤ pos) && decide (pos ≤ info.majorPos)) = true then false else true

def Lean.Meta.RecursorInfo.numMinors (info : Lean.Meta.RecursorInfo) : Nat

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• info.numMinors = info.numArgs - info.motivePos - 1 - (info.majorPos + 1 - info.firstIndexPos)

instance Lean.Meta.RecursorInfo.instToString : ToString Lean.Meta.RecursorInfo

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def Lean.Meta.Attribute.Recursor.getMajorPos (stx : Lean.Syntax) : Lean.AttrM Nat

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opaque Lean.Meta.recursorAttribute : Lean.ParametricAttribute Nat

def Lean.Meta.getMajorPos? (env : Lean.Environment) (declName : Lake.Name) : Option Nat

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• Lean.Meta.getMajorPos? env declName = Lean.Meta.recursorAttribute.getParam? env declName

def Lean.Meta.mkRecursorInfo (declName : Lake.Name) (majorPos? : optParam (Option Nat) none) : Lean.MetaM Lean.Meta.RecursorInfo

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