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|
/* NSC -- new Scala compiler
* Copyright 2005-2011 LAMP/EPFL
* @author Martin Odersky
*/
package scala.reflect
package internal
import scala.collection.{ mutable, immutable }
import Flags._
import PartialFunction._
trait Definitions extends reflect.api.StandardDefinitions {
self: SymbolTable =>
// the scala value classes
trait ValueClassDefinitions {
self: definitions.type =>
private[Definitions] def valueCache(name: Name) = {
if (name.isTypeName) ScalaPackageClass.info member name
else ScalaPackageClass.info member name suchThat (_ hasFlag MODULE)
}
private[Definitions] def valueModuleMethod(className: Name, methodName: Name): Symbol = {
valueCache(className.toTermName).moduleClass.tpe member methodName
}
import ClassfileConstants._
private val nameToWeight = Map[Name, Int](
tpnme.Byte -> 2,
tpnme.Char -> 3,
tpnme.Short -> 4,
tpnme.Int -> 12,
tpnme.Long -> 24,
tpnme.Float -> 48,
tpnme.Double -> 96
)
private val nameToTag = Map[Name, Char](
tpnme.Byte -> BYTE_TAG,
tpnme.Char -> CHAR_TAG,
tpnme.Short -> SHORT_TAG,
tpnme.Int -> INT_TAG,
tpnme.Long -> LONG_TAG,
tpnme.Float -> FLOAT_TAG,
tpnme.Double -> DOUBLE_TAG,
tpnme.Boolean -> BOOL_TAG,
tpnme.Unit -> VOID_TAG,
tpnme.Object -> TVAR_TAG
)
private def classesMap[T](f: Name => T) = symbolsMap(ScalaValueClassesNoUnit, f)
private def symbolsMap[T](syms: List[Symbol], f: Name => T): Map[Symbol, T] = syms zip (syms map (x => f(x.name))) toMap
private def symbolsMapFilt[T](syms: List[Symbol], p: Name => Boolean, f: Name => T) = symbolsMap(syms filter (x => p(x.name)), f)
private def boxedName(name: Name) = sn.Boxed(name.toTypeName)
lazy val abbrvTag = symbolsMap(ObjectClass :: ScalaValueClasses, nameToTag)
lazy val numericWeight = symbolsMapFilt(ScalaValueClasses, nameToWeight.keySet, nameToWeight)
lazy val boxedModule = classesMap(x => getModule(boxedName(x)))
lazy val boxedClass = classesMap(x => getClass(boxedName(x)))
lazy val refClass = classesMap(x => getClass("scala.runtime." + x + "Ref"))
lazy val volatileRefClass = classesMap(x => getClass("scala.runtime.Volatile" + x + "Ref"))
lazy val boxMethod = classesMap(x => valueModuleMethod(x, nme.box))
lazy val unboxMethod = classesMap(x => valueModuleMethod(x, nme.unbox))
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
}
def isNumericSubClass(sub: Symbol, sup: Symbol) = {
val cmp = for (w1 <- numericWeight get sub ; w2 <- numericWeight get sup) yield w2 % w1
cmp exists (_ == 0)
}
/** Is symbol a numeric value class? */
def isNumericValueClass(sym: Symbol): Boolean =
numericWeight contains sym
private[Definitions] def fullNameStrings: List[String] = nme.ScalaValueNames map ("scala." + _)
private[Definitions] lazy val fullValueName: Set[Name] = {
val values = nme.ScalaValueNames flatMap (x => List(newTypeName("scala." + x), newTermName("scala." + x)))
values.toSet + newTypeName("scala.AnyVal")
}
lazy val AnyValClass = valueCache(tpnme.AnyVal)
lazy val UnitClass = valueCache(tpnme.Unit)
lazy val ByteClass = valueCache(tpnme.Byte)
lazy val ShortClass = valueCache(tpnme.Short)
lazy val CharClass = valueCache(tpnme.Char)
lazy val IntClass = valueCache(tpnme.Int)
lazy val LongClass = valueCache(tpnme.Long)
lazy val FloatClass = valueCache(tpnme.Float)
lazy val DoubleClass = valueCache(tpnme.Double)
lazy val BooleanClass = valueCache(tpnme.Boolean)
def Boolean_and = getMember(BooleanClass, nme.ZAND)
def Boolean_or = getMember(BooleanClass, nme.ZOR)
def Boolean_not = getMember(BooleanClass, nme.UNARY_!)
def ScalaValueClassesNoUnit = ScalaValueClasses filterNot (_ eq UnitClass)
def ScalaValueClasses: List[Symbol] = List(
UnitClass,
BooleanClass,
ByteClass,
ShortClass,
CharClass,
IntClass,
LongClass,
FloatClass,
DoubleClass
)
}
object definitions extends AbsDefinitions with ValueClassDefinitions {
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(NullaryMethodType(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 AnyRefClass = newAlias(ScalaPackageClass, tpnme.AnyRef, ObjectClass.typeConstructor)
lazy val ObjectClass = getClass(sn.Object)
lazy val AnyCompanionClass = getClass("scala.AnyCompanion") setFlag (SEALED | ABSTRACT | TRAIT)
lazy val AnyValCompanionClass = getClass("scala.AnyValCompanion") setFlag (SEALED | ABSTRACT | TRAIT)
// 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)
// 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")
lazy val BridgeClass = getClass("scala.annotation.bridge")
// 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 StringModule = StringClass.linkedClassOfClass
lazy val ClassClass = getClass(sn.Class)
def Class_getMethod = getMember(ClassClass, nme.getMethod_)
lazy val DynamicClass = getClass("scala.Dynamic")
// fundamental modules
lazy val SysPackage = getPackageObject("scala.sys")
def Sys_error = getMember(SysPackage, nme.error)
lazy val PredefModule: Symbol = getModule("scala.Predef")
lazy val PredefModuleClass = PredefModule.tpe.typeSymbol
def Predef_AnyRef = getMember(PredefModule, "AnyRef") // used by the specialization annotation
def Predef_classOf = getMember(PredefModule, nme.classOf)
def Predef_identity = getMember(PredefModule, nme.identity)
def Predef_conforms = getMember(PredefModule, nme.conforms)
def Predef_wrapRefArray = getMember(PredefModule, nme.wrapRefArray)
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 scalaRuntimeSameElements = getMember(ScalaRunTimeModule, nme.sameElements)
lazy val ReflectRuntimeMirror = getModule("scala.reflect.runtime.Mirror")
def freeValueMethod = getMember(ReflectRuntimeMirror, "freeValue")
lazy val ReflectPackage = getPackageObject("scala.reflect")
def Reflect_mirror = getMember(ReflectPackage, "mirror")
// classes with special meanings
lazy val StringAddClass = getClass("scala.runtime.StringAdd")
lazy val ArrowAssocClass = getClass("scala.Predef.ArrowAssoc")
lazy val StringAdd_+ = getMember(StringAddClass, nme.PLUS)
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
// !!! This is not used anywhere (it was checked in that way.)
// 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 isJavaVarArgs(params: List[Symbol]) = params.nonEmpty && isJavaRepeatedParamType(params.last.tpe)
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")
lazy val 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")
def ArrayModule_overloadedApply = getMember(ArrayModule, nme.apply)
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")
lazy val SomeModule: Symbol = getModule("scala.Some")
// The given symbol represents either String.+ or StringAdd.+
def isStringAddition(sym: Symbol) = sym == String_+ || sym == StringAdd_+
def isArrowAssoc(sym: Symbol) = ArrowAssocClass.tpe.decls.toList contains sym
// The given symbol is a method with the right signature to be a runnable java program.
def isJavaMainMethod(sym: Symbol) = sym.tpe match {
case MethodType(param :: Nil, restpe) if restpe.typeSymbol == UnitClass =>
param.tpe match {
case TypeRef(_, ArrayClass, arg :: Nil) => arg.typeSymbol == StringClass
case _ => false
}
case _ => false
}
// The given class has a main method.
def hasJavaMainMethod(sym: Symbol): Boolean =
(sym.tpe member nme.main).alternatives exists isJavaMainMethod
def hasJavaMainMethod(path: String): Boolean =
hasJavaMainMethod(getModuleIfDefined(path))
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(NoPrefix, OptionClass, List(tp))
def someType(tp: Type) = typeRef(NoPrefix, 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)
lazy val isProductNClass = ProductClass.toSet
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_iterator = getMember(ProductRootClass, nme.productIterator)
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 = isProductNClass(tp.typeSymbol)
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 List(T1,...,TN) else Nil */
def getProductArgs(tpe: Type): List[Type] = tpe.baseClasses find isProductNClass match {
case Some(x) => tpe.baseType(x).typeArgs
case _ => Nil
}
def unapplyUnwrap(tpe:Type) = tpe.finalResultType.normalize match {
case RefinedType(p :: _, _) => p.normalize
case tp => tp
}
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.typeConstructor, 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: mutable.HashMap[Symbol, Symbol] = mutable.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_getClass : 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, "$isInstanceOf",
tparam => MethodType(List(), booltype)) setFlag (FINAL | SYNTHETIC)
lazy val Object_asInstanceOf = newPolyMethod(
ObjectClass, "$asInstanceOf",
tparam => MethodType(List(), tparam.typeConstructor)) setFlag (FINAL | SYNTHETIC)
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 getPackageObjectClass(fullname: Name): Symbol =
getPackageObject(fullname).companionClass
def getPackageObject(fullname: Name): Symbol =
getModuleOrClass(fullname.toTermName).info.member(newTermName("package"))
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 getClassIfDefined(fullname: Name): Symbol =
try getClass(fullname.toTypeName)
catch { case _: MissingRequirementError => NoSymbol }
def getModuleIfDefined(fullname: Name): Symbol =
try getModule(fullname.toTermName)
catch { case _: MissingRequirementError => NoSymbol }
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
}
}
def packageExists(packageName: String): Boolean =
getModuleIfDefined(packageName).isPackage
private def getModuleOrClass(path: Name, len: Int): Symbol = {
val point = path lastPos('.', len - 1)
val owner =
if (point > 0) getModuleOrClass(path.toTermName, point)
else RootClass
val name = path subName (point + 1, len)
val sym = owner.info member name
val result = if (path.isTermName) sym.suchThat(_ hasFlag MODULE) else sym
if (result != NoSymbol) result
else {
if (settings.debug.value) { log(sym.info); log(sym.info.members) }//debug
missingHook(owner, name) orElse {
MissingRequirementError.notFound((if (path.isTermName) "object " else "class ")+path)
}
}
}
/** If you're looking for a class, pass a type name.
* If a module, a term name.
*/
private def getModuleOrClass(path: Name): Symbol = getModuleOrClass(path, path.length)
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[Definitions] 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(NullaryMethodType(restpe))
private def newTypeParam(owner: Symbol, index: Int): Symbol =
owner.newTypeParameter(NoPosition, newTypeName("T" + index)) setInfo TypeBounds.empty
lazy val boxedClassValues = boxedClass.values.toSet
lazy val isUnbox = unboxMethod.values.toSet
lazy val isBox = boxMethod.values.toSet
/** Is symbol a phantom class for which no runtime representation exists? */
lazy val isPhantomClass = Set[Symbol](AnyClass, AnyValClass, NullClass, NothingClass)
/** Is the symbol that of a parent which is added during parsing? */
lazy val isPossibleSyntheticParent = ProductClass.toSet[Symbol] + ProductRootClass + SerializableClass
private lazy val scalaValueClassesSet = ScalaValueClasses.toSet
private lazy val boxedValueClassesSet = boxedClass.values.toSet + BoxedUnitClass
/** Is symbol a value class? */
def isValueClass(sym: Symbol) = scalaValueClassesSet(sym)
def isNonUnitValueClass(sym: Symbol) = (sym != UnitClass) && isValueClass(sym)
def isScalaValueType(tp: Type) = scalaValueClassesSet(tp.typeSymbol)
/** Is symbol a boxed value class, e.g. java.lang.Integer? */
def isBoxedValueClass(sym: Symbol) = boxedValueClassesSet(sym)
/** If symbol is a value class, return the value class, with the exception
* that BoxedUnit remains BoxedUnit. If not a value class, NoSymbol.
*/
def unboxedValueClass(sym: Symbol): Symbol =
if (isValueClass(sym)) sym
else if (sym == BoxedUnitClass) sym
else boxedClass.map(_.swap).getOrElse(sym, NoSymbol)
/** 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 == NoSymbol) "" // be more resistant to error conditions, e.g. neg/t3222.scala
else if (sym.owner.isPackageClass) sym.javaClassName
else flatNameString(sym.owner, separator) + nme.NAME_JOIN_STRING + 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 }
// }
// }
/** Surgery on the value classes. Without this, AnyVals defined in source
* files end up with an AnyRef parent. It is likely there is a better way
* to evade that AnyRef.
*/
private def setParents(sym: Symbol, parents: List[Type]): Symbol = sym.rawInfo match {
case ClassInfoType(_, scope, clazz) =>
sym setInfo ClassInfoType(parents, scope, clazz)
case _ =>
sym
}
def init() {
if (isInitialized) return
EmptyPackageClass setInfo ClassInfoType(Nil, newPackageScope(EmptyPackageClass), EmptyPackageClass)
EmptyPackage setInfo EmptyPackageClass.tpe
RootClass.info.decls enter EmptyPackage
RootClass.info.decls enter RootPackage
// 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_getClass requires special handling. The return type is determined on
// a per-call-site basis as if the function being called were actually:
//
// // Assuming `target.getClass()`
// def getClass[T](target: T): Class[_ <: T]
//
// Since getClass is not actually a polymorphic method, this requires compiler
// participation. At the "Any" level, the return type is Class[_] as it is in
// java.lang.Object. Java also special cases the return type.
Any_getClass = (
newMethod(AnyClass, nme.getClass_, Nil, getMember(ObjectClass, nme.getClass_).tpe.resultType)
setFlag DEFERRED
)
Any_isInstanceOf = newPolyMethod(
AnyClass, nme.isInstanceOf_, tparam => NullaryMethodType(booltype)) setFlag FINAL
Any_asInstanceOf = newPolyMethod(
AnyClass, nme.asInstanceOf_, tparam => NullaryMethodType(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,
AnyClass,
AnyRefClass,
AnyValClass,
NullClass,
NothingClass,
SingletonClass,
EqualsPatternClass,
Object_isInstanceOf,
Object_asInstanceOf
)
/** Removing the anyref parent they acquire from having a source file.
*/
setParents(AnyValClass, anyparam)
ScalaValueClasses foreach { sym =>
setParents(sym, anyvalparam)
}
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)
}
}
}
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