wartremover.warts.EitherProjectionPartial.scala Maven / Gradle / Ivy
package org.wartremover
package warts
object EitherProjectionPartial extends WartTraverser {
def apply(u: WartUniverse): u.Traverser = {
import u.universe._
val leftProjectionSymbol = rootMirror.staticClass("scala.util.Either.LeftProjection")
val rightProjectionSymbol = rootMirror.staticClass("scala.util.Either.RightProjection")
val GetName: TermName = "get"
new u.Traverser {
override def traverse(tree: Tree): Unit = {
tree match {
// Ignore trees marked by SuppressWarnings
case t if hasWartAnnotation(u)(t) =>
case Select(left, GetName) if left.tpe.baseType(leftProjectionSymbol) != NoType =>
error(u)(tree.pos, "LeftProjection#get is disabled - use LeftProjection#toOption instead")
super.traverse(tree)
case Select(left, GetName) if left.tpe.baseType(rightProjectionSymbol) != NoType =>
error(u)(tree.pos, "RightProjection#get is disabled - use RightProjection#toOption instead")
super.traverse(tree)
case _ => super.traverse(tree)
}
}
}
}
}