wartremover.warts.TraversableOps.scala Maven / Gradle / Ivy
package org.wartremover
package warts
object TraversableOps extends WartTraverser {
class Op(name: String, error: String) extends WartTraverser {
override lazy val className = "org.wartremover.warts.TraversableOps"
def apply(u: WartUniverse): u.Traverser = {
import u.universe._
val symbol = rootMirror.staticClass("scala.collection.Traversable")
val Name: TermName = name
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, Name) if left.tpe.baseType(symbol) != NoType =>
error(u)(tree.pos, error)
// TODO: This ignores a lot
case LabelDef(_, _, rhs) if isSynthetic(u)(tree) =>
case _ =>
super.traverse(tree)
}
}
}
}
}
def apply(u: WartUniverse): u.Traverser =
WartTraverser.sumList(u)(List(
new Op("head", "head is disabled - use headOption instead"),
new Op("tail", "tail is disabled - use drop(1) instead"),
new Op("init", "init is disabled - use dropRight(1) instead"),
new Op("last", "last is disabled - use lastOption instead"),
new Op("reduce", "reduce is disabled - use reduceOption or fold instead"),
new Op("reduceLeft", "reduceLeft is disabled - use reduceLeftOption or foldLeft instead"),
new Op("reduceRight", "reduceRight is disabled - use reduceRightOption or foldRight instead")
))
}