fix.LambdaParamParentheses.scala Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of scalafix-rules_2.12 Show documentation

scalafix rules

The newest version!

package fix

import scala.meta.Position
import scala.meta.Term
import scala.meta.Token
import scala.meta.XtensionClassifiable
import scala.meta.XtensionCollectionLikeUI
import scalafix.Diagnostic
import scalafix.Patch
import scalafix.lint.LintSeverity
import scalafix.v1.SyntacticDocument
import scalafix.v1.SyntacticRule
import scalafix.v1.XtensionSeqPatch

/**
 * unnecessary since Scala 2.13.11
 * [[https://github.com/scala/scala/pull/10320]]
 */
class LambdaParamParentheses extends SyntacticRule("LambdaParamParentheses") {
  override def isLinter = true

  override def fix(implicit doc: SyntacticDocument): Patch = {
    doc.tree.collect {
      case t1 @ Term.Function.Initial(param :: Nil, _) if param.decltpe.nonEmpty && param.mods.isEmpty =>
        if (t1.tokens.find(_.is[Token.LeftParen]).exists(_.pos.start <= param.pos.start)) {
          Patch.empty
        } else {
          Patch.lint(
            LambdaParamParenthesesWarn(param.pos)
          )
        }
    }.asPatch
  }
}

case class LambdaParamParenthesesWarn(override val position: Position) extends Diagnostic {
  override def message = "add parentheses or remove explicit types for prepare Scala 3"
  override def severity: LintSeverity = LintSeverity.Warning
}