org.scalafmt.Error.scala Maven / Gradle / Ivy

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package org.scalafmt

import java.io.File

import org.scalafmt.internal.Decision
import org.scalafmt.util.LoggerOps
import scala.meta.Case
import scala.meta.Tree
import scala.meta.tokens.Token.Keyword
import scala.reflect.ClassTag
import scala.reflect.classTag

sealed abstract class Error(msg: String) extends Exception(msg)

object Error {
  import LoggerOps._

  def reportIssue: String =
    "Please file an issue on https://github.com/olafurpg/scalafmt/issues"

  case class CantFindDefnToken[T <: Keyword: ClassTag](tree: Tree)
      extends Error(
          s"Expected keyword of type ${classTag[T].getClass} in tree $tree")

  case class CaseMissingArrow(tree: Case)
      extends Error(s"Missing => in case: \n$tree")

  case class FormatterChangedAST(diff: String, output: String)
      extends Error(s"""Formatter changed AST
                       |=====================
                       |$diff
                       |=====================
                       |${output.lines.toVector.take(10).mkString("\n")}
                       |=====================
                       |Formatter changed AST
      """.stripMargin)

  case class FormatterOutputDoesNotParse(msg: String)
      extends Error("Formatter output does not parse:\n" + msg)

  case class UnexpectedTree[Expected <: Tree: ClassTag](obtained: Tree)
      extends Error(
          s"Expected: ${classTag[Expected].getClass}\nObtained: ${log(obtained)}")

  case class CantFormatFile(msg: String)
      extends Error("scalafmt cannot format this file:\n" + msg)

  case class NoopDefaultPolicyApplied(decision: Decision)
      extends Error(s"Default policy run on $decision")

  case class UnknownStyle(style: String)
      extends Error(s"Don't understand style $style")

  case class MisformattedFile(file: File)
      extends Error(s"${file.getPath} is mis-formatted")
}