wartremover.warts.Equals.scala Maven / Gradle / Ivy
package org.wartremover
package warts
import reflect.NameTransformer
object Equals extends WartTraverser {
def apply(u: WartUniverse): u.Traverser = {
import u.universe._
val Eqeq: TermName = NameTransformer.encode("==")
val NotEq: TermName = NameTransformer.encode("!=")
val Equals: TermName = "equals"
val Eq: TermName = "eq"
val Ne: TermName = "ne"
new Traverser {
override def traverse(tree: Tree) = {
tree match {
// Ignore trees marked by SuppressWarnings
case t if hasWartAnnotation(u)(t) =>
case Function(_, body) => traverse(body)
case _ if isSynthetic(u)(tree) =>
case Apply(Select(lhs, Eqeq), _) =>
error(u)(tree.pos, "== is disabled - use === or equivalent instead")
case Apply(Select(lhs, NotEq), _) =>
error(u)(tree.pos, "!= is disabled - use =/= or equivalent instead")
case Apply(Select(lhs, Equals), _)
if (tree.symbol :: tree.symbol.allOverriddenSymbols).exists(_.fullName == "scala.Any.equals") =>
error(u)(tree.pos, "equals is disabled - use === or equivalent instead")
case Apply(Select(lhs, Eq), _) =>
error(u)(tree.pos, "eq is disabled - use === or equivalent instead")
case Apply(Select(lhs, Ne), _) =>
error(u)(tree.pos, "ne is disabled - use =/= or equivalent instead")
case _ => super.traverse(tree)
}
}
}
}
}