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import scala.reflect.macros.blackbox.Context
object Impls {
def foo(c: Context)(x: c.Expr[String]): c.Expr[Option[Int]] = {
import c.universe._
val body = Apply(Ident(definitions.SomeModule), List(Select(x.tree, TermName("toInt"))))
c.Expr[Option[Int]](body)
}
}
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