diff options
Diffstat (limited to 'src/reflect/scala/reflect/internal/Symbols.scala')
| -rw-r--r-- | src/reflect/scala/reflect/internal/Symbols.scala | 127 |
1 files changed, 38 insertions, 89 deletions
diff --git a/src/reflect/scala/reflect/internal/Symbols.scala b/src/reflect/scala/reflect/internal/Symbols.scala index 3b9ee9048a..ed51414382 100644 --- a/src/reflect/scala/reflect/internal/Symbols.scala +++ b/src/reflect/scala/reflect/internal/Symbols.scala @@ -7,7 +7,7 @@ package scala package reflect package internal -import scala.collection.{ mutable, immutable } +import scala.collection.immutable import scala.collection.mutable.ListBuffer import util.{ Statistics, shortClassOfInstance } import Flags._ @@ -102,6 +102,9 @@ trait Symbols extends api.Symbols { self: SymbolTable => def isPrivateThis = (this hasFlag PRIVATE) && (this hasFlag LOCAL) def isProtectedThis = (this hasFlag PROTECTED) && (this hasFlag LOCAL) + def isJavaEnum: Boolean = hasJavaEnumFlag + def isJavaAnnotation: Boolean = hasJavaAnnotationFlag + def newNestedSymbol(name: Name, pos: Position, newFlags: Long, isClass: Boolean): Symbol = name match { case n: TermName => newTermSymbol(n, pos, newFlags) case n: TypeName => if (isClass) newClassSymbol(n, pos, newFlags) else newNonClassSymbol(n, pos, newFlags) @@ -320,7 +323,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => def newModuleVarSymbol(accessor: Symbol): TermSymbol = { val newName = nme.moduleVarName(accessor.name.toTermName) val newFlags = MODULEVAR | ( if (this.isClass) PrivateLocal | SYNTHETIC else 0 ) - val newInfo = accessor.tpe.finalResultType + val newInfo = thisType.memberType(accessor).finalResultType val mval = newVariable(newName, accessor.pos.focus, newFlags.toLong) addAnnotation VolatileAttr if (this.isClass) @@ -475,10 +478,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => final def newAnonymousFunctionValue(pos: Position, newFlags: Long = 0L): TermSymbol = newTermSymbol(nme.ANON_FUN_NAME, pos, SYNTHETIC | newFlags) setInfo NoType - def newImplClass(name: TypeName, pos: Position = NoPosition, newFlags: Long = 0L): ClassSymbol = { - newClassSymbol(name, pos, newFlags | IMPLCLASS) - } - /** Refinement types P { val x: String; type T <: Number } * also have symbols, they are refinementClasses */ @@ -585,7 +584,8 @@ trait Symbols extends api.Symbols { self: SymbolTable => def isAnonymousClass = false def isCaseClass = false def isConcreteClass = false - def isImplClass = false // the implementation class of a trait + @deprecated("Trait implementation classes have been removed in Scala 2.12", "2.12.0") + def isImplClass = false def isJavaInterface = false def isNumericValueClass = false def isPrimitiveValueClass = false @@ -832,6 +832,12 @@ trait Symbols extends api.Symbols { self: SymbolTable => */ def skipPackageObject: Symbol = this + /** The package object symbol corresponding to this package or package class symbol, or NoSymbol otherwise */ + def packageObject: Symbol = + if (isPackageClass) tpe.packageObject + else if (hasPackageFlag) moduleClass.packageObject + else NoSymbol + /** If this is a constructor, its owner: otherwise this. */ final def skipConstructor: Symbol = if (isConstructor) owner else this @@ -871,7 +877,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => def isDeprecated = hasAnnotation(DeprecatedAttr) def deprecationMessage = getAnnotation(DeprecatedAttr) flatMap (_ stringArg 0) def deprecationVersion = getAnnotation(DeprecatedAttr) flatMap (_ stringArg 1) - def deprecatedParamName = getAnnotation(DeprecatedNameAttr) flatMap (_ symbolArg 0) + def deprecatedParamName = getAnnotation(DeprecatedNameAttr) flatMap (_ symbolArg 0 orElse Some(nme.NO_NAME)) def hasDeprecatedInheritanceAnnotation = hasAnnotation(DeprecatedInheritanceAttr) def deprecatedInheritanceMessage @@ -888,10 +894,11 @@ trait Symbols extends api.Symbols { self: SymbolTable => // string. So this needs attention. For now the fact that migration is // private[scala] ought to provide enough protection. def hasMigrationAnnotation = hasAnnotation(MigrationAnnotationClass) - def migrationMessage = getAnnotation(MigrationAnnotationClass) flatMap { _.stringArg(0) } - def migrationVersion = getAnnotation(MigrationAnnotationClass) flatMap { _.stringArg(1) } - def elisionLevel = getAnnotation(ElidableMethodClass) flatMap { _.intArg(0) } - def implicitNotFoundMsg = getAnnotation(ImplicitNotFoundClass) flatMap { _.stringArg(0) } + def migrationMessage = getAnnotation(MigrationAnnotationClass) flatMap { _.stringArg(0) } + def migrationVersion = getAnnotation(MigrationAnnotationClass) flatMap { _.stringArg(1) } + def elisionLevel = getAnnotation(ElidableMethodClass) flatMap { _.intArg(0) } + def implicitNotFoundMsg = getAnnotation(ImplicitNotFoundClass) flatMap { _.stringArg(0) } + def implicitAmbiguousMsg = getAnnotation(ImplicitAmbiguousClass) flatMap { _.stringArg(0) } def isCompileTimeOnly = hasAnnotation(CompileTimeOnlyAttr) def compileTimeOnlyMessage = getAnnotation(CompileTimeOnlyAttr) flatMap (_ stringArg 0) @@ -926,21 +933,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => final def isCaseCopy = isMethod && owner.isCase && isSynthetic && name == nme.copy - /** Is this symbol a trait which needs an implementation class? */ - final def needsImplClass = ( - isTrait - && (!isInterface || hasFlag(lateINTERFACE)) - && !isImplClass - ) - - /** Is this a symbol which exists only in the implementation class, not in its trait? */ - final def isImplOnly = isPrivate || ( - (owner.isTrait || owner.isImplClass) && ( - hasAllFlags(LIFTED | MODULE | METHOD) - || isConstructor - || hasFlag(notPRIVATE | LIFTED) && !hasFlag(ACCESSOR | SUPERACCESSOR | MODULE) - ) - ) final def isModuleVar = hasFlag(MODULEVAR) /** @@ -964,10 +956,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => * method `owner` returns the class C. * * Why not make a stable version of `isStatic`? Maybe some parts of the compiler depend on the - * current implementation. For example - * trait T { def foo = 1 } - * The method `foo` in the implementation class T$impl will be `isStatic`, because trait - * impl classes get the `lateMODULE` flag (T$impl.isStaticOwner is true). + * current implementation. */ def isStatic = (this hasFlag STATIC) || owner.isStaticOwner @@ -977,7 +966,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => /** Is this symbol a static member of its class? (i.e. needs to be implemented as a Java static?) */ final def isStaticMember: Boolean = - hasFlag(STATIC) || owner.isImplClass + hasFlag(STATIC) /** Does this symbol denote a class that defines static symbols? */ final def isStaticOwner: Boolean = @@ -987,7 +976,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => private def isNotOverridden = ( owner.isClass && ( owner.isEffectivelyFinal - || owner.isSealed && owner.children.forall(c => c.isEffectivelyFinal && (overridingSymbol(c) == NoSymbol)) + || (owner.isSealed && owner.sealedChildren.forall(c => c.isEffectivelyFinal && (overridingSymbol(c) == NoSymbol))) ) ) @@ -999,6 +988,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => isPrivate || isLocalToBlock ) + || isClass && originalOwner.isTerm && children.isEmpty // we track known subclasses of term-owned classes, use that infer finality ) /** Is this symbol effectively final or a concrete term member of sealed class whose children do not override it */ final def isEffectivelyFinalOrNotOverridden: Boolean = isEffectivelyFinal || (isTerm && !isDeferred && isNotOverridden) @@ -1250,7 +1240,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => def needsModuleSuffix = ( hasModuleFlag && !isMethod - && !isImplClass && !isJavaDefined ) /** These should be moved somewhere like JavaPlatform. @@ -1323,9 +1312,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => protected def createPackageObjectClassSymbol(pos: Position, newFlags: Long): PackageObjectClassSymbol = new PackageObjectClassSymbol(this, pos) initFlags newFlags - protected def createImplClassSymbol(name: TypeName, pos: Position, newFlags: Long): ClassSymbol = - new ClassSymbol(this, pos, name) with ImplClassSymbol initFlags newFlags - protected def createMethodSymbol(name: TermName, pos: Position, newFlags: Long): MethodSymbol = new MethodSymbol(this, pos, name) initFlags newFlags @@ -1364,8 +1350,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => createPackageObjectClassSymbol(pos, newFlags) else if ((newFlags & MODULE) != 0) createModuleClassSymbol(name, pos, newFlags) - else if ((newFlags & IMPLCLASS) != 0) - createImplClassSymbol(name, pos, newFlags) else createClassSymbol(name, pos, newFlags) } @@ -2013,7 +1997,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => */ def thisSym: Symbol = this - def hasSelfType = thisSym.tpeHK != this.tpeHK + def hasSelfType = (thisSym ne this) && (typeOfThis.typeConstructor ne typeConstructor) /** The type of `this` in a class, or else the type of the symbol itself. */ def typeOfThis = thisSym.tpe_* @@ -2074,12 +2058,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => */ def sourceModule: Symbol = NoSymbol - /** The implementation class of a trait. If available it will be the - * symbol with the same owner, and the name of this symbol with $class - * appended to it. - */ - final def implClass: Symbol = owner.info.decl(tpnme.implClassName(name)) - /** The class that is logically an outer class of given `clazz`. * This is the enclosing class, except for classes defined locally to constructors, * where it is the outer class of the enclosing class. @@ -2283,16 +2261,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => owner.rawInfo } - /** If this symbol is an implementation class, its interface, otherwise the symbol itself - * The method follows two strategies to determine the interface. - * - during or after erasure, it takes the last parent of the implementation class - * (which is always the interface, by convention) - * - before erasure, it looks up the interface name in the scope of the owner of the class. - * This only works for implementation classes owned by other classes or traits. - * !!! Why? - */ - def toInterface: Symbol = this - /** The module class corresponding to this module. */ def moduleClass: Symbol = NoSymbol @@ -2412,8 +2380,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => var bcs = base.info.baseClasses dropWhile (owner != _) drop 1 var sym: Symbol = NoSymbol while (!bcs.isEmpty && sym == NoSymbol) { - if (!bcs.head.isImplClass) - sym = matchingSymbol(bcs.head, base.thisType).suchThat(!_.isDeferred) + sym = matchingSymbol(bcs.head, base.thisType).suchThat(!_.isDeferred) bcs = bcs.tail } sym @@ -2514,14 +2481,15 @@ trait Symbols extends api.Symbols { self: SymbolTable => def associatedFile: AbstractFile = enclosingTopLevelClass.associatedFile def associatedFile_=(f: AbstractFile) { abort("associatedFile_= inapplicable for " + this) } - /** If this is a sealed class, its known direct subclasses. + /** If this is a sealed or local class, its known direct subclasses. * Otherwise, the empty set. */ def children: Set[Symbol] = Set() + final def sealedChildren: Set[Symbol] = if (!isSealed) Set.empty else children /** Recursively assemble all children of this symbol. */ - def sealedDescendants: Set[Symbol] = children.flatMap(_.sealedDescendants) + this + final def sealedDescendants: Set[Symbol] = if (!isSealed) Set(this) else children.flatMap(_.sealedDescendants) + this @inline final def orElse(alt: => Symbol): Symbol = if (this ne NoSymbol) this else alt @inline final def andAlso(f: Symbol => Unit): Symbol = { if (this ne NoSymbol) f(this) ; this } @@ -2546,7 +2514,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => /** String representation of symbol's definition key word */ final def keyString: String = if (isJavaInterface) "interface" - else if (isTrait && !isImplClass) "trait" + else if (isTrait) "trait" else if (isClass) "class" else if (isType && !isParameter) "type" else if (isVariable) "var" @@ -2573,7 +2541,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => else if (isSetter) ("setter", if (isSourceMethod) "method" else "value", "SET") else if (isTerm && isLazy) ("lazy value", "lazy value", "LAZ") else if (isVariable) ("field", "variable", "VAR") - else if (isImplClass) ("implementation class", "class", "IMPL") else if (isTrait) ("trait", "trait", "TRT") else if (isClass) ("class", "class", "CLS") else if (isType) ("type", "type", "TPE") @@ -2810,7 +2777,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => case DEFAULTPARAM => "<defaultparam>" // TRAIT case MIXEDIN => "<mixedin>" // EXISTENTIAL case LABEL => "<label>" // CONTRAVARIANT / INCONSTRUCTOR - case PRESUPER => "<presuper>" // IMPLCLASS case BYNAMEPARAM => if (this.isValueParameter) "<bynameparam>" else "<captured>" // COVARIANT case _ => super.resolveOverloadedFlag(flag) } @@ -2964,7 +2930,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => loop(info) } - override def exceptions = annotations flatMap ThrownException.unapply + override def exceptions = for (ThrownException(tp) <- annotations) yield tp.typeSymbol } implicit val MethodSymbolTag = ClassTag[MethodSymbol](classOf[MethodSymbol]) @@ -3211,7 +3177,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => override def resolveOverloadedFlag(flag: Long) = flag match { case INCONSTRUCTOR => "<inconstructor>" // INCONSTRUCTOR / CONTRAVARIANT / LABEL case EXISTENTIAL => "<existential>" // EXISTENTIAL / MIXEDIN - case IMPLCLASS => "<implclass>" // IMPLCLASS / PRESUPER case _ => super.resolveOverloadedFlag(flag) } @@ -3223,7 +3188,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => override def isAbstractClass = this hasFlag ABSTRACT override def isCaseClass = this hasFlag CASE override def isClassLocalToConstructor = this hasFlag INCONSTRUCTOR - override def isImplClass = this hasFlag IMPLCLASS override def isModuleClass = this hasFlag MODULE override def isPackageClass = this hasFlag PACKAGE override def isTrait = this hasFlag TRAIT @@ -3241,13 +3205,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => // The corresponding interface is the last parent by convention. private def lastParent = if (tpe.parents.isEmpty) NoSymbol else tpe.parents.last.typeSymbol - override def toInterface: Symbol = ( - if (isImplClass) { - if (phase.next.erasedTypes) lastParent - else owner.info.decl(tpnme.interfaceName(name)) - } - else super.toInterface - ) /** Is this class locally defined? * A class is local, if @@ -3278,7 +3235,7 @@ trait Symbols extends api.Symbols { self: SymbolTable => override def existentialBound = GenPolyType(this.typeParams, TypeBounds.upper(this.classBound)) - def primaryConstructorName = if (this hasFlag TRAIT | IMPLCLASS) nme.MIXIN_CONSTRUCTOR else nme.CONSTRUCTOR + def primaryConstructorName = if (this hasFlag TRAIT) nme.MIXIN_CONSTRUCTOR else nme.CONSTRUCTOR override def primaryConstructor = { val c = info decl primaryConstructorName @@ -3403,13 +3360,9 @@ trait Symbols extends api.Symbols { self: SymbolTable => def implicitMembers: Scope = { val tp = info if ((implicitMembersCacheKey1 ne tp) || (implicitMembersCacheKey2 ne tp.decls.elems)) { - // Skip a package object class, because the members are also in - // the package and we wish to avoid spurious ambiguities as in pos/t3999. - if (!isPackageObjectClass) { - implicitMembersCacheValue = tp.implicitMembers - implicitMembersCacheKey1 = tp - implicitMembersCacheKey2 = tp.decls.elems - } + implicitMembersCacheValue = tp.membersBasedOnFlags(BridgeFlags, IMPLICIT) + implicitMembersCacheKey1 = tp + implicitMembersCacheKey2 = tp.decls.elems } implicitMembersCacheValue } @@ -3428,12 +3381,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => } } - trait ImplClassSymbol extends ClassSymbol { - override def sourceModule = companionModule - // override def isImplClass = true - override def typeOfThis = thisSym.tpe // don't use the ModuleClassSymbol typeOfThisCache. - } - class PackageClassSymbol protected[Symbols] (owner0: Symbol, pos0: Position, name0: TypeName) extends ModuleClassSymbol(owner0, pos0, name0) { override def sourceModule = companionModule @@ -3445,7 +3392,6 @@ trait Symbols extends api.Symbols { self: SymbolTable => extends ClassSymbol(owner0, pos0, tpnme.REFINE_CLASS_NAME) { override def name_=(name: Name) { abort("Cannot set name of RefinementClassSymbol to " + name) - super.name_=(name) } override def isRefinementClass = true override def isAnonOrRefinementClass = true @@ -3692,7 +3638,10 @@ trait Symbols extends api.Symbols { self: SymbolTable => assert((prev eq null) || phaseId(validFrom) > phaseId(prev.validFrom), this) assert(validFrom != NoPeriod, this) - private def phaseString = "%s: %s".format(phaseOf(validFrom), info) + private def phaseString = { + val phase = phaseOf(validFrom) + s"$phase: ${exitingPhase(phase)(info.toString)}" + } override def toString = toList reverseMap (_.phaseString) mkString ", " def toList: List[TypeHistory] = this :: ( if (prev eq null) Nil else prev.toList ) |