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/* NSC -- new Scala compiler
* Copyright 2005-2010 LAMP/EPFL
* @author Martin Odersky
*/
// $Id$
package scala.tools.nsc
package symtab
object Flags extends reflect.generic.Flags {
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
// late flags (set by a transformer phase)
final val latePRIVATE = (PRIVATE: Long) << LateShift
final val lateABSTRACT = (ABSTRACT: Long) << LateShift
final val lateDEFERRED = (DEFERRED: Long) << LateShift
final val lateINTERFACE = (INTERFACE: Long) << LateShift
final val lateMODULE = (MODULE: Long) << LateShift
final val lateFINAL = (FINAL: Long) << LateShift
final val lateMETHOD = (METHOD: Long) << LateShift
final val notFINAL = (FINAL: Long) << AntiShift
final val notPRIVATE = (PRIVATE: Long) << AntiShift
final val notDEFERRED = (DEFERRED: Long) << AntiShift
final val notPROTECTED = (PROTECTED: Long) << AntiShift
final val notABSTRACT = (ABSTRACT: Long) << AntiShift
final val notOVERRIDE = (OVERRIDE: Long) << AntiShift
final val notMETHOD = (METHOD: Long) << AntiShift
// masks
/** This flags can be set when class or module symbol is first created. */
final val TopLevelCreationFlags: Long =
MODULE | PACKAGE | FINAL | JAVA
/** These modifiers can be set explicitly in source programs. */
final val ExplicitFlags: Long =
PRIVATE | PROTECTED | ABSTRACT | FINAL | SEALED |
OVERRIDE | CASE | IMPLICIT | ABSOVERRIDE | LAZY
/** These modifiers appear in TreePrinter output. */
final val PrintableFlags: Long =
ExplicitFlags | LOCAL | SYNTHETIC | STABLE | CASEACCESSOR |
ACCESSOR | SUPERACCESSOR | PARAMACCESSOR | BRIDGE | STATIC | VBRIDGE | SPECIALIZED
/** The two bridge flags */
final val BRIDGES = BRIDGE | VBRIDGE
final val FieldFlags: Long =
MUTABLE | CASEACCESSOR | PARAMACCESSOR | STATIC | FINAL | PRESUPER | LAZY
final val AccessFlags: Long = PRIVATE | PROTECTED | LOCAL
final val VARIANCES = COVARIANT | CONTRAVARIANT
final val ConstrFlags: Long = JAVA
/** Module flags inherited by their module-class */
final val ModuleToClassFlags: Long = AccessFlags | MODULE | PACKAGE | CASE | SYNTHETIC | JAVA
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
private def listToString(ss: List[String]): String =
ss.filter("" !=).mkString("", " ", "")
def flagsToString(flags: Long): String =
listToString(for (mask <- pickledListOrder) yield flagToString(flags & mask))
def flagsToString(flags: Long, privateWithin: String): String = {
var f = flags
val pw =
if (privateWithin == "") {
if ((flags & (PRIVATE | LOCAL)) == (PRIVATE | LOCAL).toLong) {
f = f & ~(PRIVATE | LOCAL)
"private[this]"
} else if ((flags & (PROTECTED | LOCAL)) == (PROTECTED | LOCAL).toLong) {
f = f & ~(PROTECTED | LOCAL)
"protected[this]"
} else {
""
}
} else if ((f & PROTECTED) != 0L) {
f = f & ~PROTECTED
"protected[" + privateWithin + "]"
} else {
"private[" + privateWithin + "]"
}
listToString(List(flagsToString(f), pw))
}
private def flagToString(flag: Long): String = {
if (flag == IS_ERROR) "<is-error>"
else if (flag == OVERLOADED ) "<overloaded>"
else if (flag == LIFTED ) "<lifted>"
else if (flag == MIXEDIN ) "<mixedin/existential>"
else if (flag == EXPANDEDNAME) "<expandedname>"
else if (flag == IMPLCLASS ) "<presuper/implclass>"
else if (flag == TRANS_FLAG ) "<trans-flag>"
else if (flag == LOCKED ) "<locked>"
else if (flag == LAZY ) "lazy"
else if (flag == SPECIALIZED ) "<specialized>"
else flag.toInt match {
case IMPLICIT => "implicit"
case FINAL => "final"
case PRIVATE => "private"
case PROTECTED => "protected"
case SEALED => "sealed"
case OVERRIDE => "override"
case CASE => "case"
case ABSTRACT => "abstract"
case DEFERRED => "<deferred>"
case METHOD => "<method>"
case MODULE => "<module>"
case INTERFACE => "<interface>"
case MUTABLE => "<mutable>"
case PARAM => "<param>"
case PACKAGE => "<package>"
case COVARIANT => "<covariant/captured/byname>"
case CONTRAVARIANT => "<contravariant/label/inconstr/defaultinit>"
case ABSOVERRIDE => "abstract override"
case LOCAL => "<local>"
case JAVA => "<java>"
case SYNTHETIC => "<synthetic>"
case STABLE => "<stable>"
case STATIC => "<static>"
case CASEACCESSOR => "<caseaccessor>"
case TRAIT => "<trait>"
case BRIDGE => "<bridge>"
case ACCESSOR => "<accessor>"
case SUPERACCESSOR => "<superaccessor>"
case PARAMACCESSOR => "<paramaccessor>"
case VBRIDGE => "<...bridge>"
case _ => ""
}
}
class Flag(mods: Long) {
def isPrivate = (mods & PRIVATE ) != 0L
def isProtected = (mods & PROTECTED) != 0L
def isVariable = (mods & MUTABLE) != 0L
def isPublic = !isPrivate && !isProtected
}
}
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