/* NSC -- new Scala compiler
* Copyright 2005-2010 LAMP/EPFL
* @author Martin Odersky
*/
package scala.tools.nsc
package symtab
import scala.collection.{ mutable, immutable }
import scala.collection.mutable.{ HashMap }
import scala.tools.nsc.util.NoPosition
import Flags._
import PartialFunction._
import classfile.ClassfileConstants
trait Definitions extends reflect.generic.StandardDefinitions {
self: SymbolTable =>
object definitions extends AbsDefinitions {
private var isInitialized = false
def isDefinitionsInitialized = isInitialized
// symbols related to packages
var emptypackagescope: Scope = null //debug
// This is the package _root_. The actual root cannot be referenced at
// the source level, but _root_ is essentially a function () => <root>.
lazy val RootPackage: Symbol = {
val rp = NoSymbol.newValue(NoPosition, nme.ROOTPKG)
.setFlag(FINAL | MODULE | PACKAGE | JAVA)
.setInfo(PolyType(List(), RootClass.tpe))
RootClass.sourceModule = rp
rp
}
// This is the actual root of everything, including the package _root_.
lazy val RootClass: ModuleClassSymbol = NoSymbol.newModuleClass(NoPosition, tpnme.ROOT)
.setFlag(FINAL | MODULE | PACKAGE | JAVA).setInfo(rootLoader)
// The empty package, which holds all top level types without given packages.
lazy val EmptyPackage = RootClass.newPackage(NoPosition, nme.EMPTY_PACKAGE_NAME).setFlag(FINAL)
lazy val EmptyPackageClass = EmptyPackage.moduleClass
lazy val JavaLangPackage = getModule(sn.JavaLang)
lazy val ScalaPackage = getModule("scala")
lazy val ScalaPackageClass = ScalaPackage.tpe.typeSymbol
lazy val RuntimePackage = getModule("scala.runtime")
lazy val RuntimePackageClass = RuntimePackage.tpe.typeSymbol
// convenient one-argument parameter lists
lazy val anyparam = List(AnyClass.typeConstructor)
lazy val anyvalparam = List(AnyValClass.typeConstructor)
lazy val anyrefparam = List(AnyRefClass.typeConstructor)
// private parameter conveniences
private def booltype = BooleanClass.typeConstructor
private def boolparam = List(booltype)
private def bytetype = ByteClass.typeConstructor
private def byteparam = List(bytetype)
private def shorttype = ShortClass.typeConstructor
private def shortparam = List(shorttype)
private def inttype = IntClass.typeConstructor
private def intparam = List(inttype)
private def longtype = LongClass.typeConstructor
private def longparam = List(longtype)
private def floattype = FloatClass.typeConstructor
private def floatparam = List(floattype)
private def doubletype = DoubleClass.typeConstructor
private def doubleparam = List(doubletype)
private def chartype = CharClass.typeConstructor
private def charparam = List(chartype)
private def stringtype = StringClass.typeConstructor
// top types
lazy val AnyClass = newClass(ScalaPackageClass, tpnme.Any, Nil) setFlag (ABSTRACT)
lazy val AnyValClass = newClass(ScalaPackageClass, tpnme.AnyVal, anyparam) setFlag (ABSTRACT | SEALED)
lazy val AnyRefClass = newAlias(ScalaPackageClass, tpnme.AnyRef, ObjectClass.typeConstructor)
lazy val ObjectClass = getClass(sn.Object)
// bottom types
lazy val NullClass = newClass(ScalaPackageClass, tpnme.Null, anyrefparam) setFlag (ABSTRACT | TRAIT | FINAL)
lazy val NothingClass = newClass(ScalaPackageClass, tpnme.Nothing, anyparam) setFlag (ABSTRACT | TRAIT | FINAL)
lazy val RuntimeNothingClass = getClass(ClassfileConstants.SCALA_NOTHING)
lazy val RuntimeNullClass = getClass(ClassfileConstants.SCALA_NULL)
lazy val AnyValCompanionClass = getClass("scala.runtime.AnyValCompanion").setFlag(SEALED | ABSTRACT | TRAIT)
// the scala value classes
import ClassfileConstants._
lazy val UnitClass = newClass(ScalaPackageClass, tpnme.Unit, anyvalparam).setFlag(ABSTRACT | FINAL)
lazy val ByteClass = newValueClass(nme.Byte, BYTE_TAG, 2)
lazy val ShortClass = newValueClass(nme.Short, SHORT_TAG, 4)
lazy val CharClass = newValueClass(nme.Char, CHAR_TAG, 3)
lazy val IntClass = newValueClass(nme.Int, INT_TAG, 12)
lazy val LongClass = newValueClass(nme.Long, LONG_TAG, 24)
lazy val FloatClass = newValueClass(nme.Float, FLOAT_TAG, 48)
lazy val DoubleClass = newValueClass(nme.Double, DOUBLE_TAG, 96)
lazy val BooleanClass = newValueClass(nme.Boolean, BOOL_TAG, 0)
def Boolean_and = getMember(BooleanClass, nme.ZAND)
def Boolean_or = getMember(BooleanClass, nme.ZOR)
def ScalaValueClasses = List(
UnitClass,
BooleanClass,
ByteClass,
ShortClass,
CharClass,
IntClass,
LongClass,
FloatClass,
DoubleClass
)
// exceptions and other throwables
lazy val ClassCastExceptionClass = getClass("java.lang.ClassCastException")
lazy val IndexOutOfBoundsExceptionClass = getClass(sn.IOOBException)
lazy val InvocationTargetExceptionClass = getClass(sn.InvTargetException)
lazy val MatchErrorClass = getClass("scala.MatchError")
lazy val NonLocalReturnControlClass = getClass("scala.runtime.NonLocalReturnControl")
lazy val NullPointerExceptionClass = getClass(sn.NPException)
lazy val ThrowableClass = getClass(sn.Throwable)
lazy val UninitializedErrorClass = getClass("scala.UninitializedFieldError")
// annotations
lazy val AnnotationClass = getClass("scala.annotation.Annotation")
lazy val ClassfileAnnotationClass = getClass("scala.annotation.ClassfileAnnotation")
lazy val StaticAnnotationClass = getClass("scala.annotation.StaticAnnotation")
lazy val uncheckedStableClass = getClass("scala.annotation.unchecked.uncheckedStable")
lazy val uncheckedVarianceClass = getClass("scala.annotation.unchecked.uncheckedVariance")
lazy val UncheckedClass = getClass("scala.unchecked")
lazy val ThrowsClass = getClass("scala.throws")
lazy val TailrecClass = getClass("scala.annotation.tailrec")
lazy val SwitchClass = getClass("scala.annotation.switch")
lazy val ElidableMethodClass = getClass("scala.annotation.elidable")
lazy val ImplicitNotFoundClass = getClass("scala.annotation.implicitNotFound")
lazy val VarargsClass = getClass("scala.annotation.varargs")
lazy val FieldTargetClass = getClass("scala.annotation.target.field")
lazy val GetterTargetClass = getClass("scala.annotation.target.getter")
lazy val SetterTargetClass = getClass("scala.annotation.target.setter")
lazy val BeanGetterTargetClass = getClass("scala.annotation.target.beanGetter")
lazy val BeanSetterTargetClass = getClass("scala.annotation.target.beanSetter")
lazy val ParamTargetClass = getClass("scala.annotation.target.param")
lazy val ScalaInlineClass = getClass("scala.inline")
lazy val ScalaNoInlineClass = getClass("scala.noinline")
lazy val SpecializedClass = getClass("scala.specialized")
// fundamental reference classes
lazy val ScalaObjectClass = getClass("scala.ScalaObject")
lazy val PartialFunctionClass = getClass("scala.PartialFunction")
lazy val SymbolClass = getClass("scala.Symbol")
lazy val StringClass = getClass(sn.String)
lazy val ClassClass = getClass(sn.Class)
def Class_getMethod = getMember(ClassClass, nme.getMethod_)
// fundamental modules
lazy val PredefModule: Symbol = getModule("scala.Predef")
lazy val PredefModuleClass = PredefModule.tpe.typeSymbol
def Predef_classOf = getMember(PredefModule, nme.classOf)
def Predef_error = getMember(PredefModule, nme.error)
def Predef_identity = getMember(PredefModule, nme.identity)
def Predef_conforms = getMember(PredefModule, nme.conforms)
lazy val ConsoleModule: Symbol = getModule("scala.Console")
lazy val ScalaRunTimeModule: Symbol = getModule("scala.runtime.ScalaRunTime")
lazy val SymbolModule: Symbol = getModule("scala.Symbol")
lazy val Symbol_apply = getMember(SymbolModule, nme.apply)
def SeqFactory = getMember(ScalaRunTimeModule, nme.Seq)
def arrayApplyMethod = getMember(ScalaRunTimeModule, "array_apply")
def arrayUpdateMethod = getMember(ScalaRunTimeModule, "array_update")
def arrayLengthMethod = getMember(ScalaRunTimeModule, "array_length")
def arrayCloneMethod = getMember(ScalaRunTimeModule, "array_clone")
def ensureAccessibleMethod = getMember(ScalaRunTimeModule, "ensureAccessible")
def scalaRuntimeHash = getMember(ScalaRunTimeModule, "hash")
def scalaRuntimeSameElements = getMember(ScalaRunTimeModule, nme.sameElements)
// classes with special meanings
lazy val NotNullClass = getClass("scala.NotNull")
lazy val DelayedInitClass = getClass("scala.DelayedInit")
def delayedInitMethod = getMember(DelayedInitClass, nme.delayedInit)
// a dummy value that communicates that a delayedInit call is compiler-generated
// from phase UnCurry to phase Constructors
def delayedInitArgVal = EmptyPackageClass.newValue(NoPosition, nme.delayedInitArg)
.setInfo(UnitClass.tpe)
lazy val TypeConstraintClass = getClass("scala.annotation.TypeConstraint")
lazy val SingletonClass = newClass(ScalaPackageClass, tpnme.Singleton, anyparam) setFlag (ABSTRACT | TRAIT | FINAL)
lazy val SerializableClass = getClass("scala.Serializable")
lazy val JavaSerializableClass = getClass(sn.JavaSerializable)
lazy val ComparableClass = getClass("java.lang.Comparable")
lazy val RepeatedParamClass = newCovariantPolyClass(
ScalaPackageClass,
tpnme.REPEATED_PARAM_CLASS_NAME,
tparam => seqType(tparam.typeConstructor)
)
lazy val JavaRepeatedParamClass = newCovariantPolyClass(
ScalaPackageClass,
tpnme.JAVA_REPEATED_PARAM_CLASS_NAME,
tparam => arrayType(tparam.typeConstructor)
)
def isByNameParamType(tp: Type) = tp.typeSymbol == ByNameParamClass
def isScalaRepeatedParamType(tp: Type) = tp.typeSymbol == RepeatedParamClass
def isJavaRepeatedParamType(tp: Type) = tp.typeSymbol == JavaRepeatedParamClass
def isRepeatedParamType(tp: Type) = isScalaRepeatedParamType(tp) || isJavaRepeatedParamType(tp)
def isScalaVarArgs(params: List[Symbol]) = params.nonEmpty && isScalaRepeatedParamType(params.last.tpe)
def isVarArgsList(params: List[Symbol]) = params.nonEmpty && isRepeatedParamType(params.last.tpe)
def isVarArgTypes(formals: List[Type]) = formals.nonEmpty && isRepeatedParamType(formals.last)
def isPrimitiveArray(tp: Type) = tp match {
case TypeRef(_, ArrayClass, arg :: Nil) => isValueClass(arg.typeSymbol)
case _ => false
}
def isArrayOfSymbol(tp: Type, elem: Symbol) = tp match {
case TypeRef(_, ArrayClass, arg :: Nil) => arg.typeSymbol == elem
case _ => false
}
lazy val ByNameParamClass = newCovariantPolyClass(
ScalaPackageClass,
tpnme.BYNAME_PARAM_CLASS_NAME,
tparam => AnyClass.typeConstructor
)
lazy val EqualsPatternClass = {
val clazz = newClass(ScalaPackageClass, tpnme.EQUALS_PATTERN_NAME, Nil)
clazz setInfo PolyType(List(newTypeParam(clazz, 0)), ClassInfoType(anyparam, new Scope, clazz))
}
// collections classes
lazy val ConsClass = getClass("scala.collection.immutable.$colon$colon")
lazy val IterableClass = getClass("scala.collection.Iterable")
lazy val IteratorClass = getClass("scala.collection.Iterator")
lazy val ListClass = getClass("scala.collection.immutable.List")
lazy val SeqClass = getClass("scala.collection.Seq")
lazy val StringBuilderClass = getClass("scala.collection.mutable.StringBuilder")
lazy val TraversableClass = getClass("scala.collection.Traversable")
lazy val ListModule = getModule("scala.collection.immutable.List")
def List_apply = getMember(ListModule, nme.apply)
lazy val NilModule = getModule("scala.collection.immutable.Nil")
lazy val SeqModule = getModule("scala.collection.Seq")
// arrays and their members
lazy val ArrayModule = getModule("scala.Array")
lazy val ArrayClass = getClass("scala.Array")
def Array_apply = getMember(ArrayClass, nme.apply)
def Array_update = getMember(ArrayClass, nme.update)
def Array_length = getMember(ArrayClass, nme.length)
lazy val Array_clone = getMember(ArrayClass, nme.clone_)
// reflection / structural types
lazy val SoftReferenceClass = getClass("java.lang.ref.SoftReference")
lazy val WeakReferenceClass = getClass("java.lang.ref.WeakReference")
lazy val MethodClass = getClass(sn.MethodAsObject)
def methodClass_setAccessible = getMember(MethodClass, nme.setAccessible)
lazy val EmptyMethodCacheClass = getClass("scala.runtime.EmptyMethodCache")
lazy val MethodCacheClass = getClass("scala.runtime.MethodCache")
def methodCache_find = getMember(MethodCacheClass, nme.find_)
def methodCache_add = getMember(MethodCacheClass, nme.add_)
// scala.reflect
lazy val PartialManifestClass = getClass("scala.reflect.ClassManifest")
lazy val PartialManifestModule = getModule("scala.reflect.ClassManifest")
lazy val FullManifestClass = getClass("scala.reflect.Manifest")
lazy val FullManifestModule = getModule("scala.reflect.Manifest")
lazy val OptManifestClass = getClass("scala.reflect.OptManifest")
lazy val NoManifest = getModule("scala.reflect.NoManifest")
lazy val CodeClass = getClass(sn.Code)
lazy val CodeModule = getModule(sn.Code)
def Code_lift = getMember(CodeModule, nme.lift_)
lazy val ScalaSignatureAnnotation = getClass("scala.reflect.ScalaSignature")
lazy val ScalaLongSignatureAnnotation = getClass("scala.reflect.ScalaLongSignature")
// invoke dynamic support
lazy val LinkageModule = getModule("java.dyn.Linkage")
lazy val Linkage_invalidateCallerClass = getMember(LinkageModule, "invalidateCallerClass")
lazy val DynamicDispatchClass = getModule("scala.runtime.DynamicDispatch")
lazy val DynamicDispatch_DontSetTarget = getMember(DynamicDispatchClass, "DontSetTarget")
// Option classes
lazy val OptionClass: Symbol = getClass("scala.Option")
lazy val SomeClass: Symbol = getClass("scala.Some")
lazy val NoneModule: Symbol = getModule("scala.None")
def isOptionType(tp: Type) = cond(tp.normalize) { case TypeRef(_, OptionClass, List(_)) => true }
def isSomeType(tp: Type) = cond(tp.normalize) { case TypeRef(_, SomeClass, List(_)) => true }
def isNoneType(tp: Type) = cond(tp.normalize) { case TypeRef(_, NoneModule, List(_)) => true }
def optionType(tp: Type) = typeRef(OptionClass.typeConstructor.prefix, OptionClass, List(tp))
def someType(tp: Type) = typeRef(SomeClass.typeConstructor.prefix, SomeClass, List(tp))
def symbolType = typeRef(SymbolClass.typeConstructor.prefix, SymbolClass, List())
def longType = typeRef(LongClass.typeConstructor.prefix, LongClass, List())
// Product, Tuple, Function
private def mkArityArray(name: String, arity: Int, countFrom: Int = 1): Array[Symbol] = {
val list = countFrom to arity map (i => getClass("scala." + name + i))
if (countFrom == 0) list.toArray
else (NoSymbol +: list).toArray
}
val MaxTupleArity, MaxProductArity, MaxFunctionArity = 22
/** The maximal dimensions of a generic array creation.
* I.e. new Array[Array[Array[Array[Array[T]]]]] creates a 5 times
* nested array. More is not allowed.
*/
val MaxArrayDims = 5
lazy val TupleClass = mkArityArray("Tuple", MaxTupleArity)
lazy val ProductClass = mkArityArray("Product", MaxProductArity)
lazy val FunctionClass = mkArityArray("Function", MaxFunctionArity, 0)
lazy val AbstractFunctionClass = mkArityArray("runtime.AbstractFunction", MaxFunctionArity, 0)
def tupleField(n: Int, j: Int) = getMember(TupleClass(n), "_" + j)
def isTupleType(tp: Type): Boolean = isTupleType(tp, false)
def isTupleTypeOrSubtype(tp: Type): Boolean = isTupleType(tp, true)
private def isTupleType(tp: Type, subtypeOK: Boolean) = tp.normalize match {
case TypeRef(_, sym, args) if args.nonEmpty =>
val len = args.length
len <= MaxTupleArity && {
val tsym = TupleClass(len)
(sym == tsym) || (subtypeOK && !tp.isHigherKinded && sym.isSubClass(tsym))
}
case _ => false
}
def tupleType(elems: List[Type]) = {
val len = elems.length
if (len <= MaxTupleArity) {
val sym = TupleClass(len)
typeRef(sym.typeConstructor.prefix, sym, elems)
} else NoType
}
lazy val ProductRootClass: Symbol = getClass("scala.Product")
def Product_productArity = getMember(ProductRootClass, nme.productArity)
def Product_productElement = getMember(ProductRootClass, nme.productElement)
// def Product_productElementName = getMember(ProductRootClass, nme.productElementName)
def Product_productPrefix = getMember(ProductRootClass, nme.productPrefix)
def Product_canEqual = getMember(ProductRootClass, nme.canEqual_)
def productProj(z:Symbol, j: Int): Symbol = getMember(z, nme.productAccessorName(j))
def productProj(n: Int, j: Int): Symbol = productProj(ProductClass(n), j)
/** returns true if this type is exactly ProductN[T1,...,Tn], not some subclass */
def isExactProductType(tp: Type): Boolean = cond(tp.normalize) {
case TypeRef(_, sym, elems) =>
val len = elems.length
len <= MaxProductArity && sym == ProductClass(len)
}
def productType(elems: List[Type]) = {
if (elems.isEmpty) UnitClass.tpe
else {
val len = elems.length
if (len <= MaxProductArity) {
val sym = ProductClass(len)
typeRef(sym.typeConstructor.prefix, sym, elems)
}
else NoType
}
}
/** if tpe <: ProductN[T1,...,TN], returns Some(T1,...,TN) else None */
def getProductArgs(tpe: Type): Option[List[Type]] =
tpe.baseClasses collectFirst { case x if isExactProductType(x.tpe) => tpe.baseType(x).typeArgs }
def unapplyUnwrap(tpe:Type) = (tpe match {
case PolyType(_,MethodType(_, res)) => res
case MethodType(_, res) => res
case tpe => tpe
}).normalize
def functionApply(n: Int) = getMember(FunctionClass(n), nme.apply)
def functionType(formals: List[Type], restpe: Type) = {
val len = formals.length
if (len <= MaxFunctionArity) {
val sym = FunctionClass(len)
typeRef(sym.typeConstructor.prefix, sym, formals :+ restpe)
} else NoType
}
def abstractFunctionForFunctionType(tp: Type) = tp.normalize match {
case tr @ TypeRef(_, _, args) if isFunctionType(tr) =>
val sym = AbstractFunctionClass(args.length - 1)
typeRef(sym.typeConstructor.prefix, sym, args)
case _ =>
NoType
}
def isFunctionType(tp: Type): Boolean = tp.normalize match {
case TypeRef(_, sym, args) if args.nonEmpty =>
val len = args.length
len < MaxFunctionArity && sym == FunctionClass(len - 1)
case _ =>
false
}
def isSeqType(tp: Type) = elementType(SeqClass, tp.normalize) != NoType
def elementType(container: Symbol, tp: Type): Type = tp match {
case TypeRef(_, `container`, arg :: Nil) => arg
case _ => NoType
}
def seqType(arg: Type) = typeRef(SeqClass.typeConstructor.prefix, SeqClass, List(arg))
def arrayType(arg: Type) = typeRef(ArrayClass.typeConstructor.prefix, ArrayClass, List(arg))
def byNameType(arg: Type) = appliedType(ByNameParamClass.typeConstructor, List(arg))
def ClassType(arg: Type) =
if (phase.erasedTypes || forMSIL) ClassClass.tpe
else appliedType(ClassClass.tpe, List(arg))
//
// .NET backend
//
lazy val ComparatorClass = getClass("scala.runtime.Comparator")
// System.ValueType
lazy val ValueTypeClass: Symbol = getClass(sn.ValueType)
// System.MulticastDelegate
lazy val DelegateClass: Symbol = getClass(sn.Delegate)
var Delegate_scalaCallers: List[Symbol] = List()
// Symbol -> (Symbol, Type): scalaCaller -> (scalaMethodSym, DelegateType)
// var Delegate_scalaCallerInfos: HashMap[Symbol, (Symbol, Type)] = _
lazy val Delegate_scalaCallerTargets: HashMap[Symbol, Symbol] = new HashMap()
def isCorrespondingDelegate(delegateType: Type, functionType: Type): Boolean = {
isSubType(delegateType, DelegateClass.tpe) &&
(delegateType.member(nme.apply).tpe match {
case MethodType(delegateParams, delegateReturn) =>
isFunctionType(functionType) &&
(functionType.normalize match {
case TypeRef(_, _, args) =>
(delegateParams.map(pt => {
if (pt.tpe == AnyClass.tpe) definitions.ObjectClass.tpe else pt})
::: List(delegateReturn)) == args
case _ => false
})
case _ => false
})
}
// members of class scala.Any
var Any_== : Symbol = _
var Any_!= : Symbol = _
var Any_equals : Symbol = _
var Any_hashCode : Symbol = _
var Any_toString : Symbol = _
var Any_isInstanceOf: Symbol = _
var Any_asInstanceOf: Symbol = _
var Any_## : Symbol = _
// members of class java.lang.{Object, String}
var Object_eq : Symbol = _
var Object_ne : Symbol = _
var Object_== : Symbol = _
var Object_!= : Symbol = _
var Object_## : Symbol = _
var Object_synchronized: Symbol = _
lazy val Object_isInstanceOf = newPolyMethod(
ObjectClass, "$isInstanceOf",
tparam => MethodType(List(), booltype)) setFlag FINAL
lazy val Object_asInstanceOf = newPolyMethod(
ObjectClass, "$asInstanceOf",
tparam => MethodType(List(), tparam.typeConstructor)) setFlag FINAL
def Object_getClass = getMember(ObjectClass, nme.getClass_)
def Object_clone = getMember(ObjectClass, nme.clone_)
def Object_finalize = getMember(ObjectClass, nme.finalize_)
def Object_notify = getMember(ObjectClass, nme.notify_)
def Object_notifyAll = getMember(ObjectClass, nme.notifyAll_)
def Object_equals = getMember(ObjectClass, nme.equals_)
def Object_hashCode = getMember(ObjectClass, nme.hashCode_)
def Object_toString = getMember(ObjectClass, nme.toString_)
var String_+ : Symbol = _
// boxed classes
lazy val ObjectRefClass = getClass("scala.runtime.ObjectRef")
lazy val VolatileObjectRefClass = getClass("scala.runtime.VolatileObjectRef")
lazy val BoxesRunTimeClass = getModule("scala.runtime.BoxesRunTime")
lazy val BoxedNumberClass = getClass(sn.BoxedNumber)
lazy val BoxedCharacterClass = getClass(sn.BoxedCharacter)
lazy val BoxedBooleanClass = getClass(sn.BoxedBoolean)
lazy val BoxedByteClass = getClass("java.lang.Byte")
lazy val BoxedShortClass = getClass("java.lang.Short")
lazy val BoxedIntClass = getClass("java.lang.Integer")
lazy val BoxedLongClass = getClass("java.lang.Long")
lazy val BoxedFloatClass = getClass("java.lang.Float")
lazy val BoxedDoubleClass = getClass("java.lang.Double")
lazy val BoxedUnitClass = getClass("scala.runtime.BoxedUnit")
lazy val BoxedUnitModule = getModule("scala.runtime.BoxedUnit")
def BoxedUnit_UNIT = getMember(BoxedUnitModule, "UNIT")
def BoxedUnit_TYPE = getMember(BoxedUnitModule, "TYPE")
// special attributes
lazy val BeanPropertyAttr: Symbol = getClass(sn.BeanProperty)
lazy val BooleanBeanPropertyAttr: Symbol = getClass(sn.BooleanBeanProperty)
lazy val CloneableAttr: Symbol = getClass("scala.cloneable")
lazy val DeprecatedAttr: Symbol = getClass("scala.deprecated")
lazy val DeprecatedNameAttr: Symbol = getClass("scala.deprecatedName")
lazy val MigrationAnnotationClass: Symbol = getClass("scala.annotation.migration")
lazy val NativeAttr: Symbol = getClass("scala.native")
lazy val RemoteAttr: Symbol = getClass("scala.remote")
lazy val ScalaNumberClass: Symbol = getClass("scala.math.ScalaNumber")
lazy val ScalaStrictFPAttr: Symbol = getClass("scala.annotation.strictfp")
lazy val SerialVersionUIDAttr: Symbol = getClass("scala.SerialVersionUID")
lazy val SerializableAttr: Symbol = getClass("scala.annotation.serializable") // @serializable is deprecated
lazy val TraitSetterAnnotationClass: Symbol = getClass("scala.runtime.TraitSetter")
lazy val TransientAttr: Symbol = getClass("scala.transient")
lazy val VolatileAttr: Symbol = getClass("scala.volatile")
lazy val AnnotationDefaultAttr: Symbol = {
val attr = newClass(RuntimePackageClass, tpnme.AnnotationDefaultATTR, List(AnnotationClass.typeConstructor))
// This attribute needs a constructor so that modifiers in parsed Java code make sense
attr.info.decls enter (attr newConstructor NoPosition setInfo MethodType(Nil, attr.tpe))
attr
}
def getModule(fullname: Name): Symbol =
getModuleOrClass(fullname.toTermName)
def getClass(fullname: Name): Symbol = {
var result = getModuleOrClass(fullname.toTypeName)
while (result.isAliasType) result = result.info.typeSymbol
result
}
def getMember(owner: Symbol, name: Name): Symbol = {
if (owner == NoSymbol) NoSymbol
else owner.info.nonPrivateMember(name) match {
case NoSymbol => throw new FatalError(owner + " does not have a member " + name)
case result => result
}
}
/** If you're looking for a class, pass a type name.
* If a module, a term name.
*/
private def getModuleOrClass(path: Name): Symbol = {
val module = path.isTermName
val fullname = path.toTermName
if (fullname == nme.NO_NAME)
return NoSymbol
var sym: Symbol = RootClass
var i = 0
var j = fullname.pos('.', i)
while (j < fullname.length) {
sym = sym.info.member(fullname.subName(i, j))
i = j + 1
j = fullname.pos('.', i)
}
val result =
if (module) sym.info.member(fullname.subName(i, j)).suchThat(_ hasFlag MODULE)
else sym.info.member(fullname.subName(i, j).toTypeName)
if (result == NoSymbol) {
if (settings.debug.value)
{ log(sym.info); log(sym.info.members) }//debug
throw new MissingRequirementError((if (module) "object " else "class ") + fullname)
}
result
}
private def newClass(owner: Symbol, name: TypeName, parents: List[Type]): Symbol = {
val clazz = owner.newClass(NoPosition, name)
clazz.setInfo(ClassInfoType(parents, new Scope, clazz))
owner.info.decls.enter(clazz)
clazz
}
private def newCovariantPolyClass(owner: Symbol, name: TypeName, parent: Symbol => Type): Symbol = {
val clazz = newClass(owner, name, List())
val tparam = newTypeParam(clazz, 0) setFlag COVARIANT
val p = parent(tparam)
/* p.typeSymbol.initialize
println(p.typeSymbol + " flags: " + Flags.flagsToString(p.typeSymbol.flags))
val parents = /*if (p.typeSymbol.isTrait)
List(definitions.AnyRefClass.tpe, p)
else*/ List(p)
println("creating " + name + " with parents " + parents) */
clazz.setInfo(
PolyType(
List(tparam),
ClassInfoType(List(AnyRefClass.tpe, p), new Scope, clazz)))
}
private def newAlias(owner: Symbol, name: TypeName, alias: Type): Symbol = {
val tpsym = owner.newAliasType(NoPosition, name)
tpsym.setInfo(alias)
owner.info.decls.enter(tpsym)
tpsym
}
private def newMethod(owner: Symbol, name: TermName): Symbol = {
val msym = owner.newMethod(NoPosition, name.encode)
owner.info.decls.enter(msym)
msym
}
private def newMethod(owner: Symbol, name: TermName, formals: List[Type], restpe: Type): Symbol = {
val msym = newMethod(owner, name)
val params = msym.newSyntheticValueParams(formals)
msym.setInfo(MethodType(params, restpe))
}
/** tcon receives the type parameter symbol as argument */
private def newPolyMethod(owner: Symbol, name: TermName, tcon: Symbol => Type): Symbol =
newPolyMethodCon(owner, name, tparam => msym => tcon(tparam))
/** tcon receives the type parameter symbol and the method symbol as arguments */
private def newPolyMethodCon(owner: Symbol, name: TermName, tcon: Symbol => Symbol => Type): Symbol = {
val msym = newMethod(owner, name)
val tparam = newTypeParam(msym, 0)
msym.setInfo(PolyType(List(tparam), tcon(tparam)(msym)))
}
private def newParameterlessMethod(owner: Symbol, name: TermName, restpe: Type) =
newMethod(owner, name).setInfo(PolyType(List(),restpe))
private def newTypeParam(owner: Symbol, index: Int): Symbol =
owner.newTypeParameter(NoPosition, newTypeName("T" + index)) setInfo TypeBounds.empty
val boxedClass = new HashMap[Symbol, Symbol]
val boxedModule = new HashMap[Symbol, Symbol]
val unboxMethod = new HashMap[Symbol, Symbol] // Type -> Method
val boxMethod = new HashMap[Symbol, Symbol] // Type -> Method
val primitiveCompanions = new mutable.HashSet[Symbol] // AnyVal -> Companion
/** Maps a companion object like scala.Int to scala.runtime.Int. */
lazy val runtimeCompanions = (primitiveCompanions map { sym =>
sym -> getModule("scala.runtime." + sym.name)
}).toMap
def isUnbox(m: Symbol) = unboxMethod.valuesIterator contains m
def isBox(m: Symbol) = boxMethod.valuesIterator contains m
val refClass = new HashMap[Symbol, Symbol]
val volatileRefClass = new HashMap[Symbol, Symbol]
val abbrvTag = new HashMap[Symbol, Char]
private val numericWeight = new HashMap[Symbol, Int]
def isNumericSubClass(sub: Symbol, sup: Symbol) = {
val cmp = for (w1 <- numericWeight get sub ; w2 <- numericWeight get sup) yield w2 % w1
cmp exists (_ == 0)
}
/** Create a companion object for scala.Unit.
*/
private def initUnitCompanionObject() {
val module = ScalaPackageClass.newModule(NoPosition, "Unit")
ScalaPackageClass.info.decls.enter(module)
val mclass = module.moduleClass
mclass.setInfo(ClassInfoType(List(AnyRefClass.tpe, AnyValCompanionClass.tpe), new Scope, mclass))
module.setInfo(mclass.tpe)
primitiveCompanions += module
}
private[symtab] def newValueClass(name: TermName, tag: Char, weight: Int): Symbol = {
val tpName = name.toTypeName
val boxedName = sn.Boxed(tpName).toTermName
val clazz = newClass(ScalaPackageClass, tpName, anyvalparam) setFlag (ABSTRACT | FINAL)
boxedClass(clazz) = getClass(boxedName)
boxedModule(clazz) = getModule(boxedName)
refClass(clazz) = getClass("scala.runtime." + name + "Ref")
volatileRefClass(clazz) = getClass("scala.runtime.Volatile" + name + "Ref")
abbrvTag(clazz) = tag
if (weight > 0) numericWeight(clazz) = weight
val module = ScalaPackageClass.newModule(NoPosition, name)
ScalaPackageClass.info.decls.enter(module)
val mclass = module.moduleClass
mclass.setInfo(ClassInfoType(List(AnyRefClass.tpe, AnyValCompanionClass.tpe), new Scope, mclass))
module.setInfo(mclass.tpe)
primitiveCompanions += module
boxMethod(clazz) = newMethod(mclass, nme.box, List(clazz.typeConstructor), boxedClass(clazz).tpe)
unboxMethod(clazz) = newMethod(mclass, nme.unbox, List(ObjectClass.typeConstructor), clazz.typeConstructor)
clazz
}
/** Sets-up symbols etc. for value classes, and their boxed versions. This
* method is called once from within the body of init. */
private def initValueClasses() {
// init scala.Boolean
newParameterlessMethod(BooleanClass, nme.UNARY_!, booltype)
List(nme.EQ, nme.NE, nme.ZOR, nme.ZAND, nme.OR, nme.AND, nme.XOR) foreach {
newMethod(BooleanClass, _, boolparam, booltype)
}
def initValueClass(clazz: Symbol, isCardinal: Boolean) {
assert (clazz ne null)
val boolBinOps = List(nme.EQ, nme.NE, nme.LT, nme.LE, nme.GT, nme.GE)
val otherBinOps = List(nme.ADD, nme.SUB, nme.MUL, nme.DIV, nme.MOD)
val cardBinOps = List(nme.OR, nme.AND, nme.XOR)
val shiftOps = List(nme.LSL, nme.LSR, nme.ASR)
def addBinops(params: List[Type], restype: Type, isCardinal: Boolean) = {
boolBinOps foreach (x => newMethod(clazz, x, params, booltype))
otherBinOps foreach (x => newMethod(clazz, x, params, restype))
if (isCardinal)
cardBinOps foreach (x => newMethod(clazz, x, params, restype))
}
// conversion methods
newParameterlessMethod(clazz, nme.toByte, bytetype)
newParameterlessMethod(clazz, nme.toShort, shorttype)
newParameterlessMethod(clazz, nme.toChar, chartype)
newParameterlessMethod(clazz, nme.toInt, inttype)
newParameterlessMethod(clazz, nme.toLong, longtype)
newParameterlessMethod(clazz, nme.toFloat, floattype)
newParameterlessMethod(clazz, nme.toDouble, doubletype)
// def +(s: String): String
newMethod(clazz, nme.ADD, List(stringtype), stringtype)
def isLongFloatOrDouble = clazz match {
case LongClass | FloatClass | DoubleClass => true
case _ => false
}
val restype = if (isLongFloatOrDouble) clazz.typeConstructor else inttype
// shift operations
if (isCardinal)
for (op <- shiftOps ; param <- List(intparam, longparam))
newMethod(clazz, op, param, restype)
// unary operations
newParameterlessMethod(clazz, nme.UNARY_+, restype)
newParameterlessMethod(clazz, nme.UNARY_-, restype)
if (isCardinal) {
newParameterlessMethod(clazz, nme.UNARY_~, restype)
}
// binary operations
List(byteparam, shortparam, charparam, intparam) .
foreach (x => addBinops(x, restype, isCardinal))
addBinops(longparam, (if (isCardinal) longtype else restype), isCardinal)
addBinops(floatparam, (if (clazz eq DoubleClass) doubletype else floattype), false )
addBinops(doubleparam, doubletype, false )
}
List(ByteClass, ShortClass, CharClass, IntClass, LongClass) foreach (x => initValueClass(x, true))
List(FloatClass, DoubleClass) foreach (x => initValueClass(x, false))
def addModuleMethod(clazz: Symbol, name: TermName, value: Any) = {
val owner = clazz.linkedClassOfClass
newParameterlessMethod(owner, name, ConstantType(Constant(value)))
}
def addDeprecatedModuleMethod(clazz: Symbol, name: TermName, value: Any, msg: String) = {
val m = addModuleMethod(clazz, name, value)
val arg = Literal(Constant(msg))
m.addAnnotation(AnnotationInfo(DeprecatedAttr.tpe, List(arg), List()))
}
addModuleMethod(ByteClass, "MinValue", java.lang.Byte.MIN_VALUE)
addModuleMethod(ByteClass, "MaxValue", java.lang.Byte.MAX_VALUE)
addModuleMethod(ShortClass, "MinValue", java.lang.Short.MIN_VALUE)
addModuleMethod(ShortClass, "MaxValue", java.lang.Short.MAX_VALUE)
addModuleMethod(CharClass, "MinValue", java.lang.Character.MIN_VALUE)
addModuleMethod(CharClass, "MaxValue", java.lang.Character.MAX_VALUE)
addModuleMethod(IntClass, "MinValue", java.lang.Integer.MIN_VALUE)
addModuleMethod(IntClass, "MaxValue", java.lang.Integer.MAX_VALUE)
addModuleMethod(LongClass, "MinValue", java.lang.Long.MIN_VALUE)
addModuleMethod(LongClass, "MaxValue", java.lang.Long.MAX_VALUE)
addDeprecatedModuleMethod(FloatClass, "MinValue", -java.lang.Float.MAX_VALUE, "use Float.MinNegativeValue instead")
addModuleMethod(FloatClass, "MinNegativeValue", -java.lang.Float.MAX_VALUE)
addModuleMethod(FloatClass, "MaxValue", java.lang.Float.MAX_VALUE)
addDeprecatedModuleMethod(FloatClass, "Epsilon", java.lang.Float.MIN_VALUE, "use Float.MinPositiveValue instead")
addModuleMethod(FloatClass, "MinPositiveValue", java.lang.Float.MIN_VALUE)
addModuleMethod(FloatClass, "NaN", java.lang.Float.NaN)
addModuleMethod(FloatClass, "PositiveInfinity", java.lang.Float.POSITIVE_INFINITY)
addModuleMethod(FloatClass, "NegativeInfinity", java.lang.Float.NEGATIVE_INFINITY)
addDeprecatedModuleMethod(DoubleClass, "MinValue", -java.lang.Double.MAX_VALUE, "use Double.MinNegativeValue instead")
addModuleMethod(DoubleClass, "MinNegativeValue", -java.lang.Double.MAX_VALUE)
addModuleMethod(DoubleClass, "MaxValue", java.lang.Double.MAX_VALUE)
// see #3791. change cycle for `Epsilon`: 1. deprecate, 2. remove, 3. re-introduce as
// org.apache.commons.math.util.MathUtils.EPSILON (0x1.0p-53). not sure what to do for float.
addDeprecatedModuleMethod(DoubleClass, "Epsilon", java.lang.Double.MIN_VALUE, "use Double.MinPositiveValue instead")
addModuleMethod(DoubleClass, "MinPositiveValue", java.lang.Double.MIN_VALUE)
addModuleMethod(DoubleClass, "NaN", java.lang.Double.NaN)
addModuleMethod(DoubleClass, "PositiveInfinity", java.lang.Double.POSITIVE_INFINITY)
addModuleMethod(DoubleClass, "NegativeInfinity", java.lang.Double.NEGATIVE_INFINITY)
}
/** Is symbol a phantom class for which no runtime representation exists? */
def isPhantomClass(sym: Symbol) =
sym == AnyClass || sym == AnyValClass || sym == NullClass || sym == NothingClass
/** Is symbol a value class? */
def isValueClass(sym: Symbol): Boolean =
(sym eq UnitClass) || (boxedClass contains sym)
/** If symbol is a value class or a boxed value class, return the value class: otherwise NoSymbol. */
def unboxedValueClass(sym: Symbol): Symbol =
if (isValueClass(sym)) sym
else if (sym == BoxedUnitClass) sym
else boxedClass.map(_.swap).getOrElse(sym, NoSymbol)
/** Is symbol a numeric value class? */
def isNumericValueClass(sym: Symbol): Boolean =
numericWeight contains sym
/** Is type's symbol a numeric value class? */
def isNumericValueType(tp: Type): Boolean = tp match {
case TypeRef(_, sym, _) => isNumericValueClass(sym)
case _ => false
}
// todo: reconcile with javaSignature!!!
def signature(tp: Type): String = {
def erasure(tp: Type): Type = tp match {
case st: SubType => erasure(st.supertype)
case RefinedType(parents, _) => erasure(parents.head)
case _ => tp
}
def flatNameString(sym: Symbol, separator: Char): String =
if (sym.owner.isPackageClass) sym.fullName('.') + (if (sym.isModuleClass) "$" else "")
else flatNameString(sym.owner, separator) + "$" + sym.simpleName;
def signature1(etp: Type): String = {
if (etp.typeSymbol == ArrayClass) "[" + signature1(erasure(etp.normalize.typeArgs.head))
else if (isValueClass(etp.typeSymbol)) abbrvTag(etp.typeSymbol).toString()
else "L" + flatNameString(etp.typeSymbol, '/') + ";"
}
val etp = erasure(tp)
if (etp.typeSymbol == ArrayClass) signature1(etp)
else flatNameString(etp.typeSymbol, '.')
}
/** getModule2/getClass2 aren't needed at present but may be again,
* so for now they're mothballed.
*/
// def getModule2(name1: Name, name2: Name) = {
// try getModuleOrClass(name1.toTermName)
// catch { case ex1: FatalError =>
// try getModuleOrClass(name2.toTermName)
// catch { case ex2: FatalError => throw ex1 }
// }
// }
// def getClass2(name1: Name, name2: Name) = {
// try {
// val result = getModuleOrClass(name1.toTypeName)
// if (result.isAliasType) getClass(name2) else result
// }
// catch { case ex1: FatalError =>
// try getModuleOrClass(name2.toTypeName)
// catch { case ex2: FatalError => throw ex1 }
// }
// }
def init {
if (isInitialized) return
EmptyPackageClass.setInfo(ClassInfoType(Nil, new Scope, EmptyPackageClass))
EmptyPackage.setInfo(EmptyPackageClass.tpe)
RootClass.info.decls.enter(EmptyPackage)
RootClass.info.decls.enter(RootPackage)
abbrvTag(UnitClass) = 'V'
initValueClasses()
initUnitCompanionObject()
// members of class scala.Any
Any_== = newMethod(AnyClass, nme.EQ, anyparam, booltype) setFlag FINAL
Any_!= = newMethod(AnyClass, nme.NE, anyparam, booltype) setFlag FINAL
Any_equals = newMethod(AnyClass, nme.equals_, anyparam, booltype)
Any_hashCode = newMethod(AnyClass, nme.hashCode_, Nil, inttype)
Any_toString = newMethod(AnyClass, nme.toString_, Nil, stringtype)
Any_## = newMethod(AnyClass, nme.HASHHASH, Nil, inttype) setFlag FINAL
Any_isInstanceOf = newPolyMethod(
AnyClass, nme.isInstanceOf_, tparam => booltype) setFlag FINAL
Any_asInstanceOf = newPolyMethod(
AnyClass, nme.asInstanceOf_, tparam => tparam.typeConstructor) setFlag FINAL
// members of class java.lang.{ Object, String }
Object_## = newMethod(ObjectClass, nme.HASHHASH, Nil, inttype) setFlag FINAL
Object_== = newMethod(ObjectClass, nme.EQ, anyrefparam, booltype) setFlag FINAL
Object_!= = newMethod(ObjectClass, nme.NE, anyrefparam, booltype) setFlag FINAL
Object_eq = newMethod(ObjectClass, nme.eq, anyrefparam, booltype) setFlag FINAL
Object_ne = newMethod(ObjectClass, nme.ne, anyrefparam, booltype) setFlag FINAL
Object_synchronized = newPolyMethodCon(
ObjectClass, nme.synchronized_,
tparam => msym => MethodType(msym.newSyntheticValueParams(List(tparam.typeConstructor)), tparam.typeConstructor)) setFlag FINAL
String_+ = newMethod(
StringClass, "+", anyparam, stringtype) setFlag FINAL
val forced = List( // force initialization of every symbol that is entered as a side effect
AnnotationDefaultAttr, // #2264
RepeatedParamClass,
JavaRepeatedParamClass,
ByNameParamClass,
UnitClass,
ByteClass,
ShortClass,
CharClass,
IntClass,
LongClass,
FloatClass,
DoubleClass,
BooleanClass,
AnyClass,
AnyRefClass,
AnyValClass,
NullClass,
NothingClass,
SingletonClass,
EqualsPatternClass,
Object_isInstanceOf,
Object_asInstanceOf
)
// AnyVal is sealed but needs to be made aware of its children
ScalaValueClasses foreach (AnyValClass addChild _)
if (forMSIL) {
val intType = IntClass.typeConstructor
val intParam = List(intType)
val longType = LongClass.typeConstructor
val charType = CharClass.typeConstructor
val unitType = UnitClass.typeConstructor
val stringType = StringClass.typeConstructor
val stringParam = List(stringType)
// additional methods of Object
newMethod(ObjectClass, "clone", List(), AnyRefClass.typeConstructor)
// wait in Java returns void, on .NET Wait returns boolean. by putting
// `booltype` the compiler adds a `drop` after calling wait.
newMethod(ObjectClass, "wait", List(), booltype)
newMethod(ObjectClass, "wait", List(longType), booltype)
newMethod(ObjectClass, "notify", List(), unitType)
newMethod(ObjectClass, "notifyAll", List(), unitType)
// additional methods of String
newMethod(StringClass, "length", List(), intType)
newMethod(StringClass, "compareTo", stringParam, intType)
newMethod(StringClass, "charAt", intParam, charType)
newMethod(StringClass, "concat", stringParam, stringType)
newMethod(StringClass, "indexOf", intParam, intType)
newMethod(StringClass, "indexOf", List(intType, intType), intType)
newMethod(StringClass, "indexOf", stringParam, intType)
newMethod(StringClass, "indexOf", List(stringType, intType), intType)
newMethod(StringClass, "lastIndexOf", intParam, intType)
newMethod(StringClass, "lastIndexOf", List(intType, intType), intType)
newMethod(StringClass, "lastIndexOf", stringParam, intType)
newMethod(StringClass, "lastIndexOf", List(stringType, intType), intType)
newMethod(StringClass, "toLowerCase", List(), stringType)
newMethod(StringClass, "toUpperCase", List(), stringType)
newMethod(StringClass, "startsWith", stringParam, booltype)
newMethod(StringClass, "endsWith", stringParam, booltype)
newMethod(StringClass, "substring", intParam, stringType)
newMethod(StringClass, "substring", List(intType, intType), stringType)
newMethod(StringClass, "trim", List(), stringType)
newMethod(StringClass, "intern", List(), stringType)
newMethod(StringClass, "replace", List(charType, charType), stringType)
newMethod(StringClass, "toCharArray", List(), arrayType(charType))
}
isInitialized = true
} //init
var nbScalaCallers: Int = 0
def newScalaCaller(delegateType: Type): Symbol = {
assert(forMSIL, "scalaCallers can only be created if target is .NET")
// object: reference to object on which to call (scala-)method
val paramTypes: List[Type] = List(ObjectClass.tpe)
val name: String = "$scalaCaller$$" + nbScalaCallers
// tparam => resultType, which is the resultType of PolyType, i.e. the result type after applying the
// type parameter =-> a MethodType in this case
// TODO: set type bounds manually (-> MulticastDelegate), see newTypeParam
val newCaller = newMethod(DelegateClass, name, paramTypes, delegateType) setFlag (FINAL | STATIC)
// val newCaller = newPolyMethod(DelegateClass, name,
// tparam => MethodType(paramTypes, tparam.typeConstructor)) setFlag (FINAL | STATIC)
Delegate_scalaCallers = Delegate_scalaCallers ::: List(newCaller)
nbScalaCallers += 1
newCaller
}
// def addScalaCallerInfo(scalaCaller: Symbol, methSym: Symbol, delType: Type) {
// assert(Delegate_scalaCallers contains scalaCaller)
// Delegate_scalaCallerInfos += (scalaCaller -> (methSym, delType))
// }
def addScalaCallerInfo(scalaCaller: Symbol, methSym: Symbol) {
assert(Delegate_scalaCallers contains scalaCaller)
Delegate_scalaCallerTargets += (scalaCaller -> methSym)
}
}
}