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Scala example source code file (Flags.scala)

This example Scala source code file (Flags.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Scala source code examples by using tags.

All credit for the original source code belongs to scala-lang.org; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Scala tags/keywords

collection, final, long, module, mutable, presuper, private, protected, stable, string, synthetic

The Flags.scala Scala example source code

/* NSC -- new Scala compiler
 * Copyright 2005-2013 LAMP/EPFL
 * @author  Martin Odersky
 */

package scala
package reflect
package internal

import scala.collection.{ mutable, immutable }

// Flags at each index of a flags Long.  Those marked with /M are used in
// Parsers/JavaParsers and therefore definitely appear on Modifiers; but the
// absence of /M on the other flags does not imply they aren't.
//
// Generated by mkFlagsTable() at Thu Feb 02 20:31:52 PST 2012
//
//  0:     PROTECTED/M
//  1:      OVERRIDE/M
//  2:       PRIVATE/M
//  3:      ABSTRACT/M
//  4:      DEFERRED/M
//  5:         FINAL/M
//  6:          METHOD
//  7:     INTERFACE/M
//  8:          MODULE
//  9:      IMPLICIT/M
// 10:        SEALED/M
// 11:          CASE/M
// 12:       MUTABLE/M
// 13:         PARAM/M
// 14:         PACKAGE
// 15:         MACRO/M
// 16:   BYNAMEPARAM/M      CAPTURED COVARIANT/M
// 17: CONTRAVARIANT/M INCONSTRUCTOR       LABEL
// 18:   ABSOVERRIDE/M
// 19:         LOCAL/M
// 20:          JAVA/M
// 21:       SYNTHETIC
// 22:          STABLE
// 23:        STATIC/M
// 24:  CASEACCESSOR/M
// 25:  DEFAULTPARAM/M       TRAIT/M
// 26:          BRIDGE
// 27:        ACCESSOR
// 28:   SUPERACCESSOR
// 29: PARAMACCESSOR/M
// 30:       MODULEVAR
// 31:          LAZY/M
// 32:        IS_ERROR
// 33:      OVERLOADED
// 34:          LIFTED
// 35:     EXISTENTIAL       MIXEDIN
// 36:    EXPANDEDNAME
// 37:       IMPLCLASS    PRESUPER/M
// 38:      TRANS_FLAG
// 39:          LOCKED
// 40:     SPECIALIZED
// 41:   DEFAULTINIT/M
// 42:         VBRIDGE
// 43:         VARARGS
// 44:    TRIEDCOOKING
// 45:  SYNCHRONIZED/M
// 46:        ARTIFACT
// 47: DEFAULTMETHOD/M
// 48:            ENUM
// 49:
// 50:
// 51:    lateDEFERRED
// 52:       lateFINAL
// 53:      lateMETHOD
// 54:   lateINTERFACE
// 55:      lateMODULE
// 56:    notPROTECTED
// 57:     notOVERRIDE
// 58:      notPRIVATE
// 59:
// 60:
// 61:
// 62:
// 63:

/** Flags set on Modifiers instances in the parsing stage.
 */
class ModifierFlags {
  final val IMPLICIT      = 1 << 9
  final val FINAL         = 1 << 5    // May not be overridden. Note that java final implies much more than scala final.
  final val PRIVATE       = 1 << 2
  final val PROTECTED     = 1 << 0

  final val SEALED        = 1 << 10
  final val OVERRIDE      = 1 << 1
  final val CASE          = 1 << 11
  final val ABSTRACT      = 1 << 3        // abstract class, or used in conjunction with abstract override.
                                          // Note difference to DEFERRED!
  final val DEFERRED      = 1 << 4        // was `abstract' for members | trait is virtual
  final val INTERFACE     = 1 << 7        // symbol is an interface (i.e. a trait which defines only abstract methods)
  final val MUTABLE       = 1 << 12       // symbol is a mutable variable.
  final val PARAM         = 1 << 13       // symbol is a (value or type) parameter to a method
  final val MACRO         = 1 << 15       // symbol is a macro definition

  final val COVARIANT     = 1 << 16       // symbol is a covariant type variable
  final val BYNAMEPARAM   = 1 << 16       // parameter is by name
  final val CONTRAVARIANT = 1 << 17       // symbol is a contravariant type variable
  final val ABSOVERRIDE   = 1 << 18       // combination of abstract & override
  final val LOCAL         = 1 << 19       // symbol is local to current class (i.e. private[this] or protected[this]
                                          // pre: PRIVATE or PROTECTED are also set
  final val JAVA          = 1 << 20       // symbol was defined by a Java class
  final val STATIC        = 1 << 23       // static field, method or class
  final val CASEACCESSOR  = 1 << 24       // symbol is a case parameter (or its accessor, or a GADT skolem)
  final val TRAIT         = 1 << 25       // symbol is a trait
  final val DEFAULTPARAM  = 1 << 25       // the parameter has a default value
  final val PARAMACCESSOR = 1 << 29       // for field definitions generated for primary constructor
                                          //   parameters (no matter if it's a 'val' parameter or not)
                                          // for parameters of a primary constructor ('val' or not)
                                          // for the accessor methods generated for 'val' or 'var' parameters
  final val LAZY          = 1L << 31      // symbol is a lazy val. can't have MUTABLE unless transformed by typer
  final val PRESUPER      = 1L << 37      // value is evaluated before super call
  final val DEFAULTINIT   = 1L << 41      // symbol is initialized to the default value: used by -Xcheckinit
  final val ARTIFACT      = 1L << 46      // symbol should be ignored when typechecking; will be marked ACC_SYNTHETIC in bytecode
                                          // to see which symbols are marked as ARTIFACT, see scaladocs for FlagValues.ARTIFACT
  final val DEFAULTMETHOD = 1L << 47      // symbol is a java default method
  final val ENUM          = 1L << 48      // symbol is an enum

  // Overridden.
  def flagToString(flag: Long): String = ""

  final val PrivateLocal   = PRIVATE | LOCAL
  final val ProtectedLocal = PROTECTED | LOCAL
  final val AccessFlags    = PRIVATE | PROTECTED | LOCAL
}
object ModifierFlags extends ModifierFlags

/** All flags and associated operations */
class Flags extends ModifierFlags {
  final val METHOD        = 1 << 6        // a method
  final val MODULE        = 1 << 8        // symbol is module or class implementing a module
  final val PACKAGE       = 1 << 14       // symbol is a java package

  final val CAPTURED      = 1 << 16       // variable is accessed from nested function.  Set by LambdaLift.
  final val LABEL         = 1 << 17       // method symbol is a label. Set by TailCall
  final val INCONSTRUCTOR = 1 << 17       // class symbol is defined in this/superclass constructor.
  final val SYNTHETIC     = 1 << 21       // symbol is compiler-generated (compare with ARTIFACT)
  final val STABLE        = 1 << 22       // functions that are assumed to be stable
                                          // (typically, access methods for valdefs)
                                          // or classes that do not contain abstract types.
  final val BRIDGE        = 1 << 26       // function is a bridge method. Set by Erasure
  final val ACCESSOR      = 1 << 27       // a value or variable accessor (getter or setter)

  final val SUPERACCESSOR = 1 << 28       // a super accessor
  final val MODULEVAR     = 1 << 30       // for variables: is the variable caching a module value

  final val IS_ERROR      = 1L << 32      // symbol is an error symbol
  final val OVERLOADED    = 1L << 33      // symbol is overloaded
  final val LIFTED        = 1L << 34      // class has been lifted out to package level
                                          // local value has been lifted out to class level
                                          // todo: make LIFTED = latePRIVATE?
  final val MIXEDIN       = 1L << 35      // term member has been mixed in
  final val EXISTENTIAL   = 1L << 35      // type is an existential parameter or skolem
  final val EXPANDEDNAME  = 1L << 36      // name has been expanded with class suffix
  final val IMPLCLASS     = 1L << 37      // symbol is an implementation class
  final val TRANS_FLAG    = 1L << 38      // transient flag guaranteed to be reset after each phase.

  final val LOCKED        = 1L << 39      // temporary flag to catch cyclic dependencies
  final val SPECIALIZED   = 1L << 40      // symbol is a generated specialized member
  final val VBRIDGE       = 1L << 42      // symbol is a varargs bridge

  final val VARARGS       = 1L << 43      // symbol is a Java-style varargs method
  final val TRIEDCOOKING  = 1L << 44      // `Cooking` has been tried on this symbol
                                          // A Java method's type is `cooked` by transforming raw types to existentials

  final val SYNCHRONIZED  = 1L << 45      // symbol is a method which should be marked ACC_SYNCHRONIZED

  // ------- shift definitions -------------------------------------------------------

  final val InitialFlags  = 0x0001FFFFFFFFFFFFL // flags that are enabled from phase 1.
  final val LateFlags     = 0x00FE000000000000L // flags that override flags in 0x1FC.
  final val AntiFlags     = 0x7F00000000000000L // flags that cancel flags in 0x07F
  final val LateShift     = 47L
  final val AntiShift     = 56L

  // Flags which sketchily share the same slot
  // 16:   BYNAMEPARAM/M      CAPTURED COVARIANT/M
  // 17: CONTRAVARIANT/M INCONSTRUCTOR       LABEL
  // 25:  DEFAULTPARAM/M       TRAIT/M
  // 35:     EXISTENTIAL       MIXEDIN
  // 37:       IMPLCLASS    PRESUPER/M
  val OverloadedFlagsMask = 0L | BYNAMEPARAM | CONTRAVARIANT | DEFAULTPARAM | EXISTENTIAL | IMPLCLASS

  // ------- late flags (set by a transformer phase) ---------------------------------
  //
  // Summary of when these are claimed to be first used.
  // You can get this output with scalac -Xshow-phases -Ydebug.
  //
  //     refchecks   7  [START] <latemethod>
  //    specialize  13  [START] <latefinal> <notprivate>
  // explicitouter  14  [START] <notprotected>
  //       erasure  15  [START] <latedeferred> <lateinterface>
  //         mixin  20  [START] <latemodule> <notoverride>
  //
  // lateMETHOD set in RefChecks#transformInfo.
  // lateFINAL set in Symbols#makeNotPrivate.
  // notPRIVATE set in Symbols#makeNotPrivate, IExplicitOuter#transform, Inliners.
  // notPROTECTED set in ExplicitOuter#transform.
  // lateDEFERRED set in AddInterfaces, Mixin, etc.
  // lateINTERFACE set in AddInterfaces#transformMixinInfo.
  // lateMODULE set in Mixin#transformInfo.
  // notOVERRIDE set in Mixin#preTransform.

  final val lateDEFERRED  = (DEFERRED: Long) << LateShift
  final val lateFINAL     = (FINAL: Long) << LateShift
  final val lateINTERFACE = (INTERFACE: Long) << LateShift
  final val lateMETHOD    = (METHOD: Long) << LateShift
  final val lateMODULE    = (MODULE: Long) << LateShift

  final val notOVERRIDE   = (OVERRIDE: Long) << AntiShift
  final val notPRIVATE    = (PRIVATE: Long) << AntiShift
  final val notPROTECTED  = (PROTECTED: Long) << AntiShift

  // ------- masks -----------------------------------------------------------------------

  /** To be a little clearer to people who aren't habitual bit twiddlers.
   */
  final val AllFlags = -1L

  /** These flags can be set when class or module symbol is first created.
   *  They are the only flags to survive a call to resetFlags().
   */
  final val TopLevelCreationFlags =
    MODULE | PACKAGE | FINAL | JAVA

  // TODO - there's no call to slap four flags onto every package.
  final val PackageFlags = TopLevelCreationFlags

  // FINAL not included here due to possibility of object overriding.
  // In fact, FINAL should not be attached regardless.  We should be able
  // to reconstruct whether an object was marked final in source.
  final val ModuleFlags = MODULE

  /** These modifiers can be set explicitly in source programs.  This is
   *  used only as the basis for the default flag mask (which ones to display
   *  when printing a normal message.)
   */
  final val ExplicitFlags =
    PRIVATE | PROTECTED | ABSTRACT | FINAL | SEALED |
    OVERRIDE | CASE | IMPLICIT | ABSOVERRIDE | LAZY | DEFAULTMETHOD

  /** The two bridge flags */
  final val BridgeFlags = BRIDGE | VBRIDGE
  final val BridgeAndPrivateFlags = BridgeFlags | PRIVATE

  /** These modifiers appear in TreePrinter output. */
  final val PrintableFlags =
    ExplicitFlags | BridgeFlags | LOCAL | SYNTHETIC | STABLE | CASEACCESSOR | MACRO |
    ACCESSOR | SUPERACCESSOR | PARAMACCESSOR | STATIC | SPECIALIZED | SYNCHRONIZED | ARTIFACT

  /** When a symbol for a field is created, only these flags survive
   *  from Modifiers.  Others which may be applied at creation time are:
   *  PRIVATE, LOCAL.
   */
  final val FieldFlags =
    MUTABLE | CASEACCESSOR | PARAMACCESSOR | STATIC | FINAL | PRESUPER | LAZY

  /** Masks for getters and setters, where the flags are derived from those
   *  on the field's modifiers.  Both getters and setters get the ACCESSOR flag.
   *  Getters of immutable values also get STABLE.
   */
  final val GetterFlags = ~(PRESUPER | MUTABLE)
  final val SetterFlags = ~(PRESUPER | MUTABLE | STABLE | CASEACCESSOR | IMPLICIT)

  /** Since DEFAULTPARAM is overloaded with TRAIT, we need some additional
   *  means of determining what that bit means. Usually DEFAULTPARAM is coupled
   *  with PARAM, which suffices. Default getters get METHOD instead.
   *  This constant is the mask of flags which can survive from the parameter modifiers.
   *  See paramFlagsToDefaultGetter for the full logic.
   */
  final val DefaultGetterFlags = PRIVATE | PROTECTED | FINAL | PARAMACCESSOR

  /** When a symbol for a method parameter is created, only these flags survive
   *  from Modifiers.  Others which may be applied at creation time are:
   *  SYNTHETIC.
   */
  final val ValueParameterFlags = BYNAMEPARAM | IMPLICIT | DEFAULTPARAM | STABLE | SYNTHETIC
  final val BeanPropertyFlags   = DEFERRED | OVERRIDE | STATIC
  final val VarianceFlags       = COVARIANT | CONTRAVARIANT

  /** These appear to be flags which should be transferred from owner symbol
   *  to a newly created constructor symbol.
   */
  final val ConstrFlags = JAVA

  /** Module flags inherited by their module-class */
  final val ModuleToClassFlags = AccessFlags | TopLevelCreationFlags | CASE | SYNTHETIC

  /** These flags are not pickled */
  final val FlagsNotPickled = IS_ERROR | OVERLOADED | LIFTED | TRANS_FLAG | LOCKED | TRIEDCOOKING

  // A precaution against future additions to FlagsNotPickled turning out
  // to be overloaded flags thus not-pickling more than intended.
  assert((OverloadedFlagsMask & FlagsNotPickled) == 0, flagsToString(OverloadedFlagsMask & FlagsNotPickled))

  /** These flags are pickled */
  final val PickledFlags  = (
      (InitialFlags & ~FlagsNotPickled)
    | notPRIVATE // for value class constructors (SI-6601), and private members referenced
                 // in @inline-marked methods publicized in SuperAccessors (see SI-6608, e6b4204604)
  )

  /** If we have a top-level class or module
   *  and someone asks us for a flag not in TopLevelPickledFlags,
   *  then we don't need unpickling to give a definite answer.
   */
  final val TopLevelPickledFlags = PickledFlags & ~(MODULE | METHOD | PACKAGE | PARAM | EXISTENTIAL)

  def paramFlagsToDefaultGetter(paramFlags: Long): Long =
    (paramFlags & DefaultGetterFlags) | SYNTHETIC | METHOD | DEFAULTPARAM

  def getterFlags(fieldFlags: Long): Long = ACCESSOR + (
    if ((fieldFlags & MUTABLE) != 0) fieldFlags & ~MUTABLE & ~PRESUPER
    else fieldFlags & ~PRESUPER | STABLE
  )

  def setterFlags(fieldFlags: Long): Long =
    getterFlags(fieldFlags) & ~STABLE & ~CASEACCESSOR

 // ------- pickling and unpickling of flags -----------------------------------------------

  // The flags from 0x001 to 0x800 are different in the raw flags
  // and in the pickled format.

  private final val IMPLICIT_PKL   = (1 << 0)
  private final val FINAL_PKL      = (1 << 1)
  private final val PRIVATE_PKL    = (1 << 2)
  private final val PROTECTED_PKL  = (1 << 3)
  private final val SEALED_PKL     = (1 << 4)
  private final val OVERRIDE_PKL   = (1 << 5)
  private final val CASE_PKL       = (1 << 6)
  private final val ABSTRACT_PKL   = (1 << 7)
  private final val DEFERRED_PKL   = (1 << 8)
  private final val METHOD_PKL     = (1 << 9)
  private final val MODULE_PKL     = (1 << 10)
  private final val INTERFACE_PKL  = (1 << 11)

  private final val PKL_MASK       = 0x00000FFF

  /** Pickler correspondence, ordered roughly by frequency of occurrence */
  private def rawPickledCorrespondence = Array[(Long, Long)](
    (METHOD, METHOD_PKL),
    (PRIVATE, PRIVATE_PKL),
    (FINAL, FINAL_PKL),
    (PROTECTED, PROTECTED_PKL),
    (CASE, CASE_PKL),
    (DEFERRED, DEFERRED_PKL),
    (MODULE, MODULE_PKL),
    (OVERRIDE, OVERRIDE_PKL),
    (INTERFACE, INTERFACE_PKL),
    (IMPLICIT, IMPLICIT_PKL),
    (SEALED, SEALED_PKL),
    (ABSTRACT, ABSTRACT_PKL)
  )

  private val mappedRawFlags = rawPickledCorrespondence map (_._1)
  private val mappedPickledFlags = rawPickledCorrespondence map (_._2)

  private class MapFlags(from: Array[Long], to: Array[Long]) extends (Long => Long) {
    val fromSet = (0L /: from) (_ | _)

    def apply(flags: Long): Long = {
      var result = flags & ~fromSet
      var tobeMapped = flags & fromSet
      var i = 0
      while (tobeMapped != 0) {
        if ((tobeMapped & from(i)) != 0) {
          result |= to(i)
          tobeMapped &= ~from(i)
        }
        i += 1
      }
      result
    }
  }

  val rawToPickledFlags: Long => Long = new MapFlags(mappedRawFlags, mappedPickledFlags)
  val pickledToRawFlags: Long => Long = new MapFlags(mappedPickledFlags, mappedRawFlags)

  // ------ displaying flags --------------------------------------------------------

  // Generated by mkFlagToStringMethod() at Thu Feb 02 20:31:52 PST 2012
  @annotation.switch override def flagToString(flag: Long): String = flag match {
    case           PROTECTED => "protected"                           // (1L << 0)
    case            OVERRIDE => "override"                            // (1L << 1)
    case             PRIVATE => "private"                             // (1L << 2)
    case            ABSTRACT => "abstract"                            // (1L << 3)
    case            DEFERRED => "<deferred>"                          // (1L << 4)
    case               FINAL => "final"                               // (1L << 5)
    case              METHOD => "<method>"                            // (1L << 6)
    case           INTERFACE => "<interface>"                         // (1L << 7)
    case              MODULE => "<module>"                            // (1L << 8)
    case            IMPLICIT => "implicit"                            // (1L << 9)
    case              SEALED => "sealed"                              // (1L << 10)
    case                CASE => "case"                                // (1L << 11)
    case             MUTABLE => "<mutable>"                           // (1L << 12)
    case               PARAM => "<param>"                             // (1L << 13)
    case             PACKAGE => "<package>"                           // (1L << 14)
    case               MACRO => "<macro>"                             // (1L << 15)
    case         BYNAMEPARAM => "<bynameparam/captured/covariant>"    // (1L << 16)
    case       CONTRAVARIANT => "<contravariant/inconstructor/label>" // (1L << 17)
    case         ABSOVERRIDE => "absoverride"                         // (1L << 18)
    case               LOCAL => "<local>"                             // (1L << 19)
    case                JAVA => "<java>"                              // (1L << 20)
    case           SYNTHETIC => "<synthetic>"                         // (1L << 21)
    case              STABLE => "<stable>"                            // (1L << 22)
    case              STATIC => "<static>"                            // (1L << 23)
    case        CASEACCESSOR => "<caseaccessor>"                      // (1L << 24)
    case        DEFAULTPARAM => "<defaultparam/trait>"                // (1L << 25)
    case              BRIDGE => "<bridge>"                            // (1L << 26)
    case            ACCESSOR => "<accessor>"                          // (1L << 27)
    case       SUPERACCESSOR => "<superaccessor>"                     // (1L << 28)
    case       PARAMACCESSOR => "<paramaccessor>"                     // (1L << 29)
    case           MODULEVAR => "<modulevar>"                         // (1L << 30)
    case                LAZY => "lazy"                                // (1L << 31)
    case            IS_ERROR => "<is_error>"                          // (1L << 32)
    case          OVERLOADED => "<overloaded>"                        // (1L << 33)
    case              LIFTED => "<lifted>"                            // (1L << 34)
    case         EXISTENTIAL => "<existential/mixedin>"               // (1L << 35)
    case        EXPANDEDNAME => "<expandedname>"                      // (1L << 36)
    case           IMPLCLASS => "<implclass/presuper>"                // (1L << 37)
    case          TRANS_FLAG => "<trans_flag>"                        // (1L << 38)
    case              LOCKED => "<locked>"                            // (1L << 39)
    case         SPECIALIZED => "<specialized>"                       // (1L << 40)
    case         DEFAULTINIT => "<defaultinit>"                       // (1L << 41)
    case             VBRIDGE => "<vbridge>"                           // (1L << 42)
    case             VARARGS => "<varargs>"                           // (1L << 43)
    case        TRIEDCOOKING => "<triedcooking>"                      // (1L << 44)
    case        SYNCHRONIZED => "<synchronized>"                      // (1L << 45)
    case            ARTIFACT => "<artifact>"                          // (1L << 46)
    case       DEFAULTMETHOD => "<defaultmethod>"                     // (1L << 47)
    case                ENUM => "<enum>"                              // (1L << 48)
    case    0x2000000000000L => ""                                    // (1L << 49)
    case    0x4000000000000L => ""                                    // (1L << 50)
    case      `lateDEFERRED` => "<latedeferred>"                      // (1L << 51)
    case         `lateFINAL` => "<latefinal>"                         // (1L << 52)
    case        `lateMETHOD` => "<latemethod>"                        // (1L << 53)
    case     `lateINTERFACE` => "<lateinterface>"                     // (1L << 54)
    case        `lateMODULE` => "<latemodule>"                        // (1L << 55)
    case      `notPROTECTED` => "<notprotected>"                      // (1L << 56)
    case       `notOVERRIDE` => "<notoverride>"                       // (1L << 57)
    case        `notPRIVATE` => "<notprivate>"                        // (1L << 58)
    case  0x800000000000000L => ""                                    // (1L << 59)
    case 0x1000000000000000L => ""                                    // (1L << 60)
    case 0x2000000000000000L => ""                                    // (1L << 61)
    case 0x4000000000000000L => ""                                    // (1L << 62)
    case 0x8000000000000000L => ""                                    // (1L << 63)
    case _ => ""
  }

  private def accessString(flags: Long, privateWithin: String)= (
    if (privateWithin == "") {
      if ((flags & PrivateLocal) == PrivateLocal) "private[this]"
      else if ((flags & ProtectedLocal) == ProtectedLocal) "protected[this]"
      else if ((flags & PRIVATE) != 0) "private"
      else if ((flags & PROTECTED) != 0) "protected"
      else ""
    }
    else if ((flags & PROTECTED) != 0) "protected[" + privateWithin + "]"
    else "private[" + privateWithin + "]"
  )

  @deprecated("Use flagString on the flag-carrying member", "2.10.0")
  private[scala] def flagsToString(flags: Long, privateWithin: String): String = {
    val access    = accessString(flags, privateWithin)
    val nonAccess = flagsToString(flags & ~AccessFlags)

    List(nonAccess, access) filterNot (_ == "") mkString " "
  }

  @deprecated("Use flagString on the flag-carrying member", "2.10.0")
  private[scala] def flagsToString(flags: Long): String = {
    // Fast path for common case
    if (flags == 0L) "" else {
      var sb: StringBuilder = null
      var i = 0
      while (i <= MaxBitPosition) {
        val mask = rawFlagPickledOrder(i)
        if ((flags & mask) != 0L) {
          val s = flagToString(mask)
          if (s.length > 0) {
            if (sb eq null) sb = new StringBuilder append s
            else if (sb.length == 0) sb append s
            else sb append " " append s
          }
        }
        i += 1
      }
      if (sb eq null) "" else sb.toString
    }
  }

  // List of the raw flags, in pickled order
  final val MaxBitPosition = 62

  final val pickledListOrder: List[Long] = {
    val all   = 0 to MaxBitPosition map (1L << _)
    val front = mappedRawFlags map (_.toLong)

    front.toList ++ (all filterNot (front contains _))
  }
  final val rawFlagPickledOrder: Array[Long] = pickledListOrder.toArray
}

object Flags extends Flags

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