Documentation

Lean.Meta.Tactic.Induction

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    def Lean.Meta.getMajorTypeIndices (mvarId : Lean.MVarId) (tacticName : Lake.Name) (recursorInfo : Lean.Meta.RecursorInfo) (majorType : Lean.Expr) :

    Auxiliary method for implementing induction-like tactics. It retrieves indices from majorType using recursorInfo. Remark: mvarId and tacticName are used to generate error messages.

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      def Lean.Meta.mkRecursorAppPrefix (mvarId : Lean.MVarId) (tacticName : Lake.Name) (majorFVarId : Lean.FVarId) (recursorInfo : Lean.Meta.RecursorInfo) (indices : Array Lean.Expr) :

      Auxiliary method for implementing induction-like tactics. It creates the prefix of a recursor application up-to motive. The motive is computed by abstracting major and indices at mvarId.getType. It retrieves indices from majorType using recursorInfo. Remark: mvarId and tacticName are used to generate error messages.

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