org.wartremover.warts.IsInstanceOf.scala Maven / Gradle / Ivy
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package org.wartremover
package warts
import scala.annotation.nowarn
object IsInstanceOf extends WartTraverser {
def apply(u: WartUniverse): u.Traverser = {
import u.universe._
val IsInstanceOfName = TermName("isInstanceOf")
val CanEqualName = TermName("canEqual")
val EqualsName = TermName("equals")
new u.Traverser {
@nowarn("msg=lineContent")
override def traverse(tree: Tree): Unit = {
val synthetic = isSynthetic(u)(tree)
tree match {
// Ignore trees marked by SuppressWarnings
case t if hasWartAnnotation(u)(t) =>
// Ignore synthetic canEquals() and equals()
case DefDef(_, CanEqualName | EqualsName, _, _, _, _) if synthetic =>
// Otherwise nope, for non-synthetic receivers
case Select(id, IsInstanceOfName)
if !isSynthetic(u)(id)
&& tree.pos.lineContent.contains(IsInstanceOfName.toString) =>
error(u)(tree.pos, "isInstanceOf is disabled")
case _ => super.traverse(tree)
}
}
}
}
}