org.wartremover.warts.ReverseTakeReverse.scala Maven / Gradle / Ivy
package org.wartremover
package warts
object ReverseTakeReverse extends WartTraverser {
def apply(u: WartUniverse): u.Traverser = {
import u.universe._
val seq = rootMirror.staticClass("scala.collection.Seq").toTypeConstructor
val int = typeOf[Int]
new u.Traverser {
override def traverse(tree: Tree): Unit = {
tree match {
case _ if hasWartAnnotation(u)(tree) =>
case Select(
Apply(Select(Select(left, TermName("reverse")), TermName("take")), a1 :: Nil),
TermName("reverse")
) if left.tpe.typeConstructor <:< seq && a1.tpe <:< int =>
error(u)(tree.pos, "you can use takeRight instead of reverse.take.reverse")
case _ =>
super.traverse(tree)
}
}
}
}
}