Documentation

Lean.Meta.MatchUtil

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      @[inline]
      def Lean.Meta.matchHelper? {α : Type} (e : Expr) (p? : ExprMetaM (Option α)) :
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          Matches e with lhs = (rhs : α) and returns (α, lhs, rhs).

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                  Return some (α, lhs, rhs) if e is of the form @Eq α lhs rhs or @HEq α lhs α rhs

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