Converts Seq to List

SeqToList

import scalafix._
import scalafix.Patch
import scalafix.SemanticdbIndex
import scalafix.rule.RuleCtx
import scalafix.rule.SemanticRule
import scala.meta._
import contrib._
import scalafix.lint.LintMessage

case class SeqToList(index: SemanticdbIndex) extends SemanticRule(index, "SeqToList") {

  def isSeq = (n: Term.Name) => n.value == "Seq"

  override def fix(ctx: RuleCtx): Patch = {

    ctx.tree.collect {
      case t @ Term.Name(_) if isSeq(t) =>
        ctx.replaceTree (t,"List")
      case op @ Term.Name(value) if value == "+:" =>
        ctx.replaceTree (op,"::")
      case tseq @ Term.Name(value) if value == "toSeq" =>
        ctx.replaceTree (tseq,"toList")
      case typ @ Type.Name(value) if value == "Seq" =>
        ctx.replaceTree (typ,"List")
    }
  }.asPatch

  //override def check(ctx: RuleCtx): Seq[LintMessage] = {
  //  ctx.tree.collect {
  //    case [email protected](_) if isSeq(t) =>
  //      LintMessage(s"we only use List for collections", t.pos, LintCategory.error(s"Do not use Seq"))
  //  }
  //}
}