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Lean.Elab.PreDefinition.Structural.BRecOn

source
def Lean.Elab.Structural.refinedArgType (matcherApp : Lean.Meta.MatcherApp) (arg : Lean.Expr) :
Lean.MetaM Bool

This method is used after matcherApp.addArg arg to check whether the new type of arg has been "refined/modified" in at least one alternative.

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    source
    def Lean.Elab.Structural.mkBRecOn (recFnName : Lake.Name) (recArgInfo : Lean.Elab.Structural.RecArgInfo) (value : Lean.Expr) :
    Lean.Elab.Structural.M Lean.Expr
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