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import scala.reflect.makro.{Context => Ctx}
object Impls {
def foo[U](c: Ctx)(x: c.Expr[U])(evidence: c.Expr[Numeric[U]]) = {
import c.universe._
val plusOne = Apply(Select(evidence.tree, newTermName("plus")), List(x.tree, Literal(Constant(1))))
val body = Apply(Select(Ident(definitions.PredefModule), newTermName("println")), List(plusOne))
Expr[Unit](body)
}
}
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