package dotty.tools
package dotc
package core
import Types._, Contexts._, Symbols._, Denotations._, SymDenotations._, StdNames._, Names._
import Flags._, Scopes._, Decorators._, NameOps._, util.Positions._, Periods._
import unpickleScala2.Scala2Unpickler.ensureConstructor
import scala.annotation.{ switch, meta }
import scala.collection.{ mutable, immutable }
import PartialFunction._
import collection.mutable
import util.common.alwaysZero
import typer.Applications
object Definitions {
/** The maximum number of elements in a tuple or product.
* This should be removed once we go to hlists.
*/
val MaxTupleArity = 22
/** The maximum arity N of a function type that's implemented
* as a trait `scala.FunctionN`. Functions of higher arity are possible,
* but are mapped in erasure to functions taking a single parameter of type
* Object[].
* The limit 22 is chosen for Scala2x interop. It could be something
* else without affecting the set of programs that can be compiled.
*/
val MaxImplementedFunctionArity = 22
/** The maximal arity of a function that can be accessed as member of a structural type */
val MaxStructuralMethodArity = 7
}
/** A class defining symbols and types of standard definitions
*
* Note: There's a much nicer design possible once we have implicit functions.
* The idea is explored to some degree in branch wip-definitions (#929): Instead of a type
* and a separate symbol definition, we produce in one line an implicit function from
* Context to Symbol, and possibly also the corresponding type. This cuts down on all
* the duplication encountered here.
*
* wip-definitions tries to do the same with an implicit conversion from a SymbolPerRun
* type to a symbol type. The problem with that is universal equality. Comparisons will
* not trigger the conversion and will therefore likely return false results.
*
* So the branch is put on hold, until we have implicit functions, which will always
* automatically be dereferenced.
*/
class Definitions {
import Definitions._
private implicit var ctx: Context = _
private def newSymbol[N <: Name](owner: Symbol, name: N, flags: FlagSet, info: Type) =
ctx.newSymbol(owner, name, flags | Permanent, info)
private def newClassSymbol(owner: Symbol, name: TypeName, flags: FlagSet, infoFn: ClassSymbol => Type) =
ctx.newClassSymbol(owner, name, flags | Permanent, infoFn)
private def enterCompleteClassSymbol(owner: Symbol, name: TypeName, flags: FlagSet, parents: List[TypeRef], decls: Scope = newScope) =
ctx.newCompleteClassSymbol(owner, name, flags | Permanent, parents, decls).entered
private def enterTypeField(cls: ClassSymbol, name: TypeName, flags: FlagSet, scope: MutableScope) =
scope.enter(newSymbol(cls, name, flags, TypeBounds.empty))
private def enterTypeParam(cls: ClassSymbol, name: TypeName, flags: FlagSet, scope: MutableScope) =
enterTypeField(cls, name, flags | ClassTypeParamCreationFlags, scope)
private def enterSyntheticTypeParam(cls: ClassSymbol, paramFlags: FlagSet, scope: MutableScope, suffix: String = "T0") =
enterTypeParam(cls, suffix.toTypeName.expandedName(cls), paramFlags, scope)
// NOTE: Ideally we would write `parentConstrs: => Type*` but SIP-24 is only
// implemented in Dotty and not in Scala 2.
// See <http://docs.scala-lang.org/sips/pending/repeated-byname.html>.
private def enterSpecialPolyClass(name: TypeName, paramFlags: FlagSet, parentConstrs: => Seq[Type]): ClassSymbol = {
val completer = new LazyType {
def complete(denot: SymDenotation)(implicit ctx: Context): Unit = {
val cls = denot.asClass.classSymbol
val paramDecls = newScope
val typeParam = enterSyntheticTypeParam(cls, paramFlags, paramDecls)
def instantiate(tpe: Type) =
if (tpe.typeParams.nonEmpty) tpe.appliedTo(typeParam.typeRef)
else tpe
val parents = parentConstrs.toList map instantiate
val parentRefs: List[TypeRef] = ctx.normalizeToClassRefs(parents, cls, paramDecls)
denot.info = ClassInfo(ScalaPackageClass.thisType, cls, parentRefs, paramDecls)
}
}
newClassSymbol(ScalaPackageClass, name, EmptyFlags, completer).entered
}
/** The trait FunctionN or ImplicitFunctionN, for some N
* @param name The name of the trait to be created
*
* FunctionN traits follow this template:
*
* trait FunctionN[T0,...T{N-1}, R] extends Object {
* def apply($x0: T0, ..., $x{N_1}: T{N-1}): R
* }
*
* That is, they follow the template given for Function2..Function22 in the
* standard library, but without `tupled` and `curried` methods and without
* a `toString`.
*
* ImplicitFunctionN traits follow this template:
*
* trait ImplicitFunctionN[T0,...,T{N-1}, R] extends Object with FunctionN[T0,...,T{N-1}, R] {
* def apply(implicit $x0: T0, ..., $x{N_1}: T{N-1}): R
* }
*/
def newFunctionNTrait(name: TypeName) = {
val completer = new LazyType {
def complete(denot: SymDenotation)(implicit ctx: Context): Unit = {
val cls = denot.asClass.classSymbol
val decls = newScope
val arity = name.functionArity
val argParams =
for (i <- List.range(0, arity)) yield
enterTypeParam(cls, name ++ "$T" ++ i.toString, Contravariant, decls)
val resParam = enterTypeParam(cls, name ++ "$R", Covariant, decls)
val (methodType, parentTraits) =
if (name.firstPart.startsWith(str.ImplicitFunction)) {
val superTrait =
FunctionType(arity).appliedTo(argParams.map(_.typeRef) ::: resParam.typeRef :: Nil)
(ImplicitMethodType, ctx.normalizeToClassRefs(superTrait :: Nil, cls, decls))
}
else (MethodType, Nil)
val applyMeth =
decls.enter(
newMethod(cls, nme.apply,
methodType(argParams.map(_.typeRef), resParam.typeRef), Deferred))
denot.info =
ClassInfo(ScalaPackageClass.thisType, cls, ObjectType :: parentTraits, decls)
}
}
newClassSymbol(ScalaPackageClass, name, Trait | NoInits, completer)
}
private def newMethod(cls: ClassSymbol, name: TermName, info: Type, flags: FlagSet = EmptyFlags): TermSymbol =
newSymbol(cls, name.encode, flags | Method, info).asTerm
private def enterMethod(cls: ClassSymbol, name: TermName, info: Type, flags: FlagSet = EmptyFlags): TermSymbol =
newMethod(cls, name, info, flags).entered
private def enterAliasType(name: TypeName, tpe: Type, flags: FlagSet = EmptyFlags): TypeSymbol = {
val sym = newSymbol(ScalaPackageClass, name, flags, TypeAlias(tpe))
ScalaPackageClass.currentPackageDecls.enter(sym)
sym
}
private def enterPolyMethod(cls: ClassSymbol, name: TermName, typeParamCount: Int,
resultTypeFn: PolyType => Type, flags: FlagSet = EmptyFlags) = {
val tparamNames = PolyType.syntheticParamNames(typeParamCount)
val tparamInfos = tparamNames map (_ => TypeBounds.empty)
val ptype = PolyType(tparamNames)(_ => tparamInfos, resultTypeFn)
enterMethod(cls, name, ptype, flags)
}
private def enterT1ParameterlessMethod(cls: ClassSymbol, name: TermName, resultTypeFn: PolyType => Type, flags: FlagSet) =
enterPolyMethod(cls, name, 1, resultTypeFn, flags)
private def enterT1EmptyParamsMethod(cls: ClassSymbol, name: TermName, resultTypeFn: PolyType => Type, flags: FlagSet) =
enterPolyMethod(cls, name, 1, pt => MethodType(Nil, resultTypeFn(pt)), flags)
private def mkArityArray(name: String, arity: Int, countFrom: Int): Array[TypeRef] = {
val arr = new Array[TypeRef](arity + 1)
for (i <- countFrom to arity) arr(i) = ctx.requiredClassRef(name + i)
arr
}
private def completeClass(cls: ClassSymbol): ClassSymbol = {
ensureConstructor(cls, EmptyScope)
if (cls.linkedClass.exists) cls.linkedClass.info = NoType
cls
}
lazy val RootClass: ClassSymbol = ctx.newPackageSymbol(
NoSymbol, nme.ROOT, (root, rootcls) => ctx.rootLoader(root)).moduleClass.asClass
lazy val RootPackage: TermSymbol = ctx.newSymbol(
NoSymbol, nme.ROOTPKG, PackageCreationFlags, TypeRef(NoPrefix, RootClass))
lazy val EmptyPackageVal = ctx.newPackageSymbol(
RootClass, nme.EMPTY_PACKAGE, (emptypkg, emptycls) => ctx.rootLoader(emptypkg)).entered
lazy val EmptyPackageClass = EmptyPackageVal.moduleClass.asClass
/** A package in which we can place all methods that are interpreted specially by the compiler */
lazy val OpsPackageVal = ctx.newCompletePackageSymbol(RootClass, nme.OPS_PACKAGE).entered
lazy val OpsPackageClass = OpsPackageVal.moduleClass.asClass
lazy val ScalaPackageVal = ctx.requiredPackage("scala")
lazy val ScalaMathPackageVal = ctx.requiredPackage("scala.math")
lazy val ScalaPackageClass = ScalaPackageVal.moduleClass.asClass
lazy val JavaPackageVal = ctx.requiredPackage("java")
lazy val JavaLangPackageVal = ctx.requiredPackage("java.lang")
// fundamental modules
lazy val SysPackage = ctx.requiredModule("scala.sys.package")
lazy val Sys_errorR = SysPackage.moduleClass.requiredMethodRef(nme.error)
def Sys_error(implicit ctx: Context) = Sys_errorR.symbol
/** The `scalaShadowing` package is used to safely modify classes and
* objects in scala so that they can be used from dotty. They will
* be visible as members of the `scala` package, replacing any objects
* or classes with the same name. But their binary artifacts are
* in `scalaShadowing` so they don't clash with the same-named `scala`
* members at runtime.
*/
lazy val ScalaShadowingPackageVal = ctx.requiredPackage("scalaShadowing")
lazy val ScalaShadowingPackageClass = ScalaShadowingPackageVal.moduleClass.asClass
/** Note: We cannot have same named methods defined in Object and Any (and AnyVal, for that matter)
* because after erasure the Any and AnyVal references get remapped to the Object methods
* which would result in a double binding assertion failure.
* Instead we do the following:
*
* - Have some methods exist only in Any, and remap them with the Erasure denotation
* transformer to be owned by Object.
* - Have other methods exist only in Object.
* To achieve this, we synthesize all Any and Object methods; Object methods no longer get
* loaded from a classfile.
*
* There's a remaining question about `getClass`. In Scala2.x `getClass` was handled by compiler magic.
* This is deemed too cumersome for Dotty and therefore right now `getClass` gets no special treatment;
* it's just a method on `Any` which returns the raw type `java.lang.Class`. An alternative
* way to get better `getClass` typing would be to treat `getClass` as a method of a generic
* decorator which gets remapped in a later phase to Object#getClass. Then we could give it
* the right type without changing the typechecker:
*
* implicit class AnyGetClass[T](val x: T) extends AnyVal {
* def getClass: java.lang.Class[T] = ???
* }
*/
lazy val AnyClass: ClassSymbol = completeClass(enterCompleteClassSymbol(ScalaPackageClass, tpnme.Any, Abstract, Nil))
def AnyType = AnyClass.typeRef
lazy val AnyValClass: ClassSymbol = completeClass(enterCompleteClassSymbol(ScalaPackageClass, tpnme.AnyVal, Abstract, List(AnyClass.typeRef)))
def AnyValType = AnyValClass.typeRef
lazy val Any_== = enterMethod(AnyClass, nme.EQ, methOfAny(BooleanType), Final)
lazy val Any_!= = enterMethod(AnyClass, nme.NE, methOfAny(BooleanType), Final)
lazy val Any_equals = enterMethod(AnyClass, nme.equals_, methOfAny(BooleanType))
lazy val Any_hashCode = enterMethod(AnyClass, nme.hashCode_, MethodType(Nil, IntType))
lazy val Any_toString = enterMethod(AnyClass, nme.toString_, MethodType(Nil, StringType))
lazy val Any_## = enterMethod(AnyClass, nme.HASHHASH, ExprType(IntType), Final)
lazy val Any_getClass = enterMethod(AnyClass, nme.getClass_, MethodType(Nil, ClassClass.typeRef.appliedTo(TypeBounds.empty)), Final)
lazy val Any_isInstanceOf = enterT1ParameterlessMethod(AnyClass, nme.isInstanceOf_, _ => BooleanType, Final)
lazy val Any_asInstanceOf = enterT1ParameterlessMethod(AnyClass, nme.asInstanceOf_, TypeParamRef(_, 0), Final)
def AnyMethods = List(Any_==, Any_!=, Any_equals, Any_hashCode,
Any_toString, Any_##, Any_getClass, Any_isInstanceOf, Any_asInstanceOf)
lazy val ObjectClass: ClassSymbol = {
val cls = ctx.requiredClass("java.lang.Object")
assert(!cls.isCompleted, "race for completing java.lang.Object")
cls.info = ClassInfo(cls.owner.thisType, cls, AnyClass.typeRef :: Nil, newScope)
// The companion object doesn't really exist, `NoType` is the general
// technique to do that. Here we need to set it before completing
// attempt to load Object's classfile, which causes issue #1648.
val companion = JavaLangPackageVal.info.decl(nme.Object).symbol
companion.info = NoType // to indicate that it does not really exist
completeClass(cls)
}
def ObjectType = ObjectClass.typeRef
lazy val AnyRefAlias: TypeSymbol = enterAliasType(tpnme.AnyRef, ObjectType)
def AnyRefType = AnyRefAlias.typeRef
lazy val Object_eq = enterMethod(ObjectClass, nme.eq, methOfAnyRef(BooleanType), Final)
lazy val Object_ne = enterMethod(ObjectClass, nme.ne, methOfAnyRef(BooleanType), Final)
lazy val Object_synchronized = enterPolyMethod(ObjectClass, nme.synchronized_, 1,
pt => MethodType(List(TypeParamRef(pt, 0)), TypeParamRef(pt, 0)), Final)
lazy val Object_clone = enterMethod(ObjectClass, nme.clone_, MethodType(Nil, ObjectType), Protected)
lazy val Object_finalize = enterMethod(ObjectClass, nme.finalize_, MethodType(Nil, UnitType), Protected)
lazy val Object_notify = enterMethod(ObjectClass, nme.notify_, MethodType(Nil, UnitType))
lazy val Object_notifyAll = enterMethod(ObjectClass, nme.notifyAll_, MethodType(Nil, UnitType))
lazy val Object_wait = enterMethod(ObjectClass, nme.wait_, MethodType(Nil, UnitType))
lazy val Object_waitL = enterMethod(ObjectClass, nme.wait_, MethodType(LongType :: Nil, UnitType))
lazy val Object_waitLI = enterMethod(ObjectClass, nme.wait_, MethodType(LongType :: IntType :: Nil, UnitType))
def ObjectMethods = List(Object_eq, Object_ne, Object_synchronized, Object_clone,
Object_finalize, Object_notify, Object_notifyAll, Object_wait, Object_waitL, Object_waitLI)
/** Dummy method needed by elimByName */
lazy val dummyApply = enterPolyMethod(
OpsPackageClass, nme.dummyApply, 1,
pt => MethodType(List(FunctionOf(Nil, TypeParamRef(pt, 0))), TypeParamRef(pt, 0)))
/** Method representing a throw */
lazy val throwMethod = enterMethod(OpsPackageClass, nme.THROWkw,
MethodType(List(ThrowableType), NothingType))
lazy val NothingClass: ClassSymbol = enterCompleteClassSymbol(
ScalaPackageClass, tpnme.Nothing, AbstractFinal, List(AnyClass.typeRef))
def NothingType = NothingClass.typeRef
lazy val NullClass: ClassSymbol = enterCompleteClassSymbol(
ScalaPackageClass, tpnme.Null, AbstractFinal, List(ObjectClass.typeRef))
def NullType = NullClass.typeRef
lazy val ScalaPredefModuleRef = ctx.requiredModuleRef("scala.Predef")
def ScalaPredefModule(implicit ctx: Context) = ScalaPredefModuleRef.symbol
lazy val Predef_ConformsR = ScalaPredefModule.requiredClass("$less$colon$less").typeRef
def Predef_Conforms(implicit ctx: Context) = Predef_ConformsR.symbol
lazy val Predef_conformsR = ScalaPredefModule.requiredMethodRef("$conforms")
def Predef_conforms(implicit ctx: Context) = Predef_conformsR.symbol
lazy val Predef_classOfR = ScalaPredefModule.requiredMethodRef("classOf")
def Predef_classOf(implicit ctx: Context) = Predef_classOfR.symbol
lazy val ScalaRuntimeModuleRef = ctx.requiredModuleRef("scala.runtime.ScalaRunTime")
def ScalaRuntimeModule(implicit ctx: Context) = ScalaRuntimeModuleRef.symbol
def ScalaRuntimeClass(implicit ctx: Context) = ScalaRuntimeModule.moduleClass.asClass
def runtimeMethodRef(name: PreName) = ScalaRuntimeModule.requiredMethodRef(name)
def ScalaRuntime_dropR(implicit ctx: Context) = runtimeMethodRef(nme.drop)
def ScalaRuntime_drop(implicit ctx: Context) = ScalaRuntime_dropR.symbol
lazy val BoxesRunTimeModuleRef = ctx.requiredModuleRef("scala.runtime.BoxesRunTime")
def BoxesRunTimeModule(implicit ctx: Context) = BoxesRunTimeModuleRef.symbol
def BoxesRunTimeClass(implicit ctx: Context) = BoxesRunTimeModule.moduleClass.asClass
lazy val ScalaStaticsModuleRef = ctx.requiredModuleRef("scala.runtime.Statics")
def ScalaStaticsModule(implicit ctx: Context) = ScalaStaticsModuleRef.symbol
def ScalaStaticsClass(implicit ctx: Context) = ScalaStaticsModule.moduleClass.asClass
def staticsMethodRef(name: PreName) = ScalaStaticsModule.requiredMethodRef(name)
def staticsMethod(name: PreName) = ScalaStaticsModule.requiredMethod(name)
// Dotty deviation: we cannot use a lazy val here because lazy vals in dotty
// will return "null" when called recursively, see #1856.
def DottyPredefModuleRef = {
if (myDottyPredefModuleRef == null) {
myDottyPredefModuleRef = ctx.requiredModuleRef("dotty.DottyPredef")
assert(myDottyPredefModuleRef != null)
}
myDottyPredefModuleRef
}
private[this] var myDottyPredefModuleRef: TermRef = _
def DottyPredefModule(implicit ctx: Context) = DottyPredefModuleRef.symbol
def Predef_eqAny(implicit ctx: Context) = DottyPredefModule.requiredMethod(nme.eqAny)
lazy val Predef_ImplicitConverterR = DottyPredefModule.requiredClass("ImplicitConverter").typeRef
def Predef_ImplicitConverter(implicit ctx: Context) = Predef_ImplicitConverterR.symbol
lazy val DottyArraysModuleRef = ctx.requiredModuleRef("dotty.runtime.Arrays")
def DottyArraysModule(implicit ctx: Context) = DottyArraysModuleRef.symbol
def newGenericArrayMethod(implicit ctx: Context) = DottyArraysModule.requiredMethod("newGenericArray")
def newArrayMethod(implicit ctx: Context) = DottyArraysModule.requiredMethod("newArray")
lazy val NilModuleRef = ctx.requiredModuleRef("scala.collection.immutable.Nil")
def NilModule(implicit ctx: Context) = NilModuleRef.symbol
lazy val SingletonClass: ClassSymbol =
// needed as a synthetic class because Scala 2.x refers to it in classfiles
// but does not define it as an explicit class.
enterCompleteClassSymbol(
ScalaPackageClass, tpnme.Singleton, PureInterfaceCreationFlags | Final,
List(AnyClass.typeRef), EmptyScope)
def SingletonType = SingletonClass.typeRef
lazy val SeqType: TypeRef = ctx.requiredClassRef("scala.collection.Seq")
def SeqClass(implicit ctx: Context) = SeqType.symbol.asClass
lazy val Seq_applyR = SeqClass.requiredMethodRef(nme.apply)
def Seq_apply(implicit ctx: Context) = Seq_applyR.symbol
lazy val Seq_headR = SeqClass.requiredMethodRef(nme.head)
def Seq_head(implicit ctx: Context) = Seq_headR.symbol
lazy val ArrayType: TypeRef = ctx.requiredClassRef("scala.Array")
def ArrayClass(implicit ctx: Context) = ArrayType.symbol.asClass
lazy val Array_applyR = ArrayClass.requiredMethodRef(nme.apply)
def Array_apply(implicit ctx: Context) = Array_applyR.symbol
lazy val Array_updateR = ArrayClass.requiredMethodRef(nme.update)
def Array_update(implicit ctx: Context) = Array_updateR.symbol
lazy val Array_lengthR = ArrayClass.requiredMethodRef(nme.length)
def Array_length(implicit ctx: Context) = Array_lengthR.symbol
lazy val Array_cloneR = ArrayClass.requiredMethodRef(nme.clone_)
def Array_clone(implicit ctx: Context) = Array_cloneR.symbol
lazy val ArrayConstructorR = ArrayClass.requiredMethodRef(nme.CONSTRUCTOR)
def ArrayConstructor(implicit ctx: Context) = ArrayConstructorR.symbol
lazy val ArrayModuleType = ctx.requiredModuleRef("scala.Array")
def ArrayModule(implicit ctx: Context) = ArrayModuleType.symbol.moduleClass.asClass
lazy val UnitType: TypeRef = valueTypeRef("scala.Unit", BoxedUnitType, java.lang.Void.TYPE, UnitEnc)
def UnitClass(implicit ctx: Context) = UnitType.symbol.asClass
lazy val BooleanType = valueTypeRef("scala.Boolean", BoxedBooleanType, java.lang.Boolean.TYPE, BooleanEnc)
def BooleanClass(implicit ctx: Context) = BooleanType.symbol.asClass
lazy val Boolean_notR = BooleanClass.requiredMethodRef(nme.UNARY_!)
def Boolean_! = Boolean_notR.symbol
lazy val Boolean_andR = BooleanClass.requiredMethodRef(nme.ZAND) // ### harmonize required... calls
def Boolean_&& = Boolean_andR.symbol
lazy val Boolean_orR = BooleanClass.requiredMethodRef(nme.ZOR)
def Boolean_|| = Boolean_orR.symbol
lazy val ByteType: TypeRef = valueTypeRef("scala.Byte", BoxedByteType, java.lang.Byte.TYPE, ByteEnc)
def ByteClass(implicit ctx: Context) = ByteType.symbol.asClass
lazy val ShortType: TypeRef = valueTypeRef("scala.Short", BoxedShortType, java.lang.Short.TYPE, ShortEnc)
def ShortClass(implicit ctx: Context) = ShortType.symbol.asClass
lazy val CharType: TypeRef = valueTypeRef("scala.Char", BoxedCharType, java.lang.Character.TYPE, CharEnc)
def CharClass(implicit ctx: Context) = CharType.symbol.asClass
lazy val IntType: TypeRef = valueTypeRef("scala.Int", BoxedIntType, java.lang.Integer.TYPE, IntEnc)
def IntClass(implicit ctx: Context) = IntType.symbol.asClass
lazy val Int_minusR = IntClass.requiredMethodRef(nme.MINUS, List(IntType))
def Int_- = Int_minusR.symbol
lazy val Int_plusR = IntClass.requiredMethodRef(nme.PLUS, List(IntType))
def Int_+ = Int_plusR.symbol
lazy val Int_divR = IntClass.requiredMethodRef(nme.DIV, List(IntType))
def Int_/ = Int_divR.symbol
lazy val Int_mulR = IntClass.requiredMethodRef(nme.MUL, List(IntType))
def Int_* = Int_mulR.symbol
lazy val Int_eqR = IntClass.requiredMethodRef(nme.EQ, List(IntType))
def Int_== = Int_eqR.symbol
lazy val Int_geR = IntClass.requiredMethodRef(nme.GE, List(IntType))
def Int_>= = Int_geR.symbol
lazy val Int_leR = IntClass.requiredMethodRef(nme.LE, List(IntType))
def Int_<= = Int_leR.symbol
lazy val LongType: TypeRef = valueTypeRef("scala.Long", BoxedLongType, java.lang.Long.TYPE, LongEnc)
def LongClass(implicit ctx: Context) = LongType.symbol.asClass
lazy val Long_XOR_Long = LongType.member(nme.XOR).requiredSymbol(
x => (x is Method) && (x.info.firstParamTypes.head isRef defn.LongClass)
)
lazy val Long_LSR_Int = LongType.member(nme.LSR).requiredSymbol(
x => (x is Method) && (x.info.firstParamTypes.head isRef defn.IntClass)
)
lazy val FloatType: TypeRef = valueTypeRef("scala.Float", BoxedFloatType, java.lang.Float.TYPE, FloatEnc)
def FloatClass(implicit ctx: Context) = FloatType.symbol.asClass
lazy val DoubleType: TypeRef = valueTypeRef("scala.Double", BoxedDoubleType, java.lang.Double.TYPE, DoubleEnc)
def DoubleClass(implicit ctx: Context) = DoubleType.symbol.asClass
lazy val BoxedUnitType: TypeRef = ctx.requiredClassRef("scala.runtime.BoxedUnit")
def BoxedUnitClass(implicit ctx: Context) = BoxedUnitType.symbol.asClass
def BoxedUnit_UNIT(implicit ctx: Context) = BoxedUnitClass.linkedClass.requiredValue("UNIT")
lazy val BoxedBooleanType: TypeRef = ctx.requiredClassRef("java.lang.Boolean")
def BoxedBooleanClass(implicit ctx: Context) = BoxedBooleanType.symbol.asClass
lazy val BoxedByteType: TypeRef = ctx.requiredClassRef("java.lang.Byte")
def BoxedByteClass(implicit ctx: Context) = BoxedByteType.symbol.asClass
lazy val BoxedShortType: TypeRef = ctx.requiredClassRef("java.lang.Short")
def BoxedShortClass(implicit ctx: Context) = BoxedShortType.symbol.asClass
lazy val BoxedCharType: TypeRef = ctx.requiredClassRef("java.lang.Character")
def BoxedCharClass(implicit ctx: Context) = BoxedCharType.symbol.asClass
lazy val BoxedIntType: TypeRef = ctx.requiredClassRef("java.lang.Integer")
def BoxedIntClass(implicit ctx: Context) = BoxedIntType.symbol.asClass
lazy val BoxedLongType: TypeRef = ctx.requiredClassRef("java.lang.Long")
def BoxedLongClass(implicit ctx: Context) = BoxedLongType.symbol.asClass
lazy val BoxedFloatType: TypeRef = ctx.requiredClassRef("java.lang.Float")
def BoxedFloatClass(implicit ctx: Context) = BoxedFloatType.symbol.asClass
lazy val BoxedDoubleType: TypeRef = ctx.requiredClassRef("java.lang.Double")
def BoxedDoubleClass(implicit ctx: Context) = BoxedDoubleType.symbol.asClass
lazy val BoxedBooleanModule = ctx.requiredModule("java.lang.Boolean")
lazy val BoxedByteModule = ctx.requiredModule("java.lang.Byte")
lazy val BoxedShortModule = ctx.requiredModule("java.lang.Short")
lazy val BoxedCharModule = ctx.requiredModule("java.lang.Character")
lazy val BoxedIntModule = ctx.requiredModule("java.lang.Integer")
lazy val BoxedLongModule = ctx.requiredModule("java.lang.Long")
lazy val BoxedFloatModule = ctx.requiredModule("java.lang.Float")
lazy val BoxedDoubleModule = ctx.requiredModule("java.lang.Double")
lazy val BoxedUnitModule = ctx.requiredModule("java.lang.Void")
lazy val ByNameParamClass2x = enterSpecialPolyClass(tpnme.BYNAME_PARAM_CLASS, Covariant, Seq(AnyType))
lazy val EqualsPatternClass = enterSpecialPolyClass(tpnme.EQUALS_PATTERN, EmptyFlags, Seq(AnyType))
lazy val RepeatedParamClass = enterSpecialPolyClass(tpnme.REPEATED_PARAM_CLASS, Covariant, Seq(ObjectType, SeqType))
// fundamental classes
lazy val StringClass = ctx.requiredClass("java.lang.String")
def StringType: Type = StringClass.typeRef
lazy val StringModule = StringClass.linkedClass
lazy val String_+ = enterMethod(StringClass, nme.raw.PLUS, methOfAny(StringType), Final)
lazy val String_valueOf_Object = StringModule.info.member(nme.valueOf).suchThat(_.info.firstParamTypes match {
case List(pt) => (pt isRef AnyClass) || (pt isRef ObjectClass)
case _ => false
}).symbol
lazy val JavaCloneableClass = ctx.requiredClass("java.lang.Cloneable")
lazy val NullPointerExceptionClass = ctx.requiredClass("java.lang.NullPointerException")
lazy val IndexOutOfBoundsException = ctx.requiredClass("java.lang.IndexOutOfBoundsException")
lazy val ClassClass = ctx.requiredClass("java.lang.Class")
lazy val BoxedNumberClass = ctx.requiredClass("java.lang.Number")
lazy val ThrowableClass = ctx.requiredClass("java.lang.Throwable")
lazy val ClassCastExceptionClass = ctx.requiredClass("java.lang.ClassCastException")
lazy val JavaSerializableClass = ctx.requiredClass("java.io.Serializable")
lazy val ComparableClass = ctx.requiredClass("java.lang.Comparable")
// in scalac modified to have Any as parent
lazy val SerializableType: TypeRef = ctx.requiredClassRef("scala.Serializable")
def SerializableClass(implicit ctx: Context) = SerializableType.symbol.asClass
lazy val StringBuilderType: TypeRef = ctx.requiredClassRef("scala.collection.mutable.StringBuilder")
def StringBuilderClass(implicit ctx: Context) = StringBuilderType.symbol.asClass
lazy val MatchErrorType: TypeRef = ctx.requiredClassRef("scala.MatchError")
def MatchErrorClass(implicit ctx: Context) = MatchErrorType.symbol.asClass
lazy val StringAddType: TypeRef = ctx.requiredClassRef("scala.runtime.StringAdd")
def StringAddClass(implicit ctx: Context) = StringAddType.symbol.asClass
lazy val StringAdd_plusR = StringAddClass.requiredMethodRef(nme.raw.PLUS)
def StringAdd_+(implicit ctx: Context) = StringAdd_plusR.symbol
lazy val PartialFunctionType: TypeRef = ctx.requiredClassRef("scala.PartialFunction")
def PartialFunctionClass(implicit ctx: Context) = PartialFunctionType.symbol.asClass
lazy val AbstractPartialFunctionType: TypeRef = ctx.requiredClassRef("scala.runtime.AbstractPartialFunction")
def AbstractPartialFunctionClass(implicit ctx: Context) = AbstractPartialFunctionType.symbol.asClass
lazy val FunctionXXLType: TypeRef = ctx.requiredClassRef("scala.FunctionXXL")
def FunctionXXLClass(implicit ctx: Context) = FunctionXXLType.symbol.asClass
lazy val SymbolType: TypeRef = ctx.requiredClassRef("scala.Symbol")
def SymbolClass(implicit ctx: Context) = SymbolType.symbol.asClass
lazy val DynamicType: TypeRef = ctx.requiredClassRef("scala.Dynamic")
def DynamicClass(implicit ctx: Context) = DynamicType.symbol.asClass
lazy val OptionType: TypeRef = ctx.requiredClassRef("scala.Option")
def OptionClass(implicit ctx: Context) = OptionType.symbol.asClass
lazy val EnumType: TypeRef = ctx.requiredClassRef("scala.Enum")
def EnumClass(implicit ctx: Context) = EnumType.symbol.asClass
lazy val EnumValuesType: TypeRef = ctx.requiredClassRef("scala.runtime.EnumValues")
def EnumValuesClass(implicit ctx: Context) = EnumValuesType.symbol.asClass
lazy val ProductType: TypeRef = ctx.requiredClassRef("scala.Product")
def ProductClass(implicit ctx: Context) = ProductType.symbol.asClass
lazy val Product_canEqualR = ProductClass.requiredMethodRef(nme.canEqual_)
def Product_canEqual(implicit ctx: Context) = Product_canEqualR.symbol
lazy val Product_productArityR = ProductClass.requiredMethodRef(nme.productArity)
def Product_productArity(implicit ctx: Context) = Product_productArityR.symbol
lazy val Product_productPrefixR = ProductClass.requiredMethodRef(nme.productPrefix)
def Product_productPrefix(implicit ctx: Context) = Product_productPrefixR.symbol
lazy val LanguageModuleRef = ctx.requiredModule("scala.language")
def LanguageModuleClass(implicit ctx: Context) = LanguageModuleRef.symbol.moduleClass.asClass
lazy val NonLocalReturnControlType: TypeRef = ctx.requiredClassRef("scala.runtime.NonLocalReturnControl")
lazy val SelectableType: TypeRef = ctx.requiredClassRef("scala.Selectable")
lazy val ClassTagType = ctx.requiredClassRef("scala.reflect.ClassTag")
def ClassTagClass(implicit ctx: Context) = ClassTagType.symbol.asClass
def ClassTagModule(implicit ctx: Context) = ClassTagClass.companionModule
lazy val EqType = ctx.requiredClassRef("scala.Eq")
def EqClass(implicit ctx: Context) = EqType.symbol.asClass
lazy val XMLTopScopeModuleRef = ctx.requiredModuleRef("scala.xml.TopScope")
// Annotation base classes
lazy val AnnotationType = ctx.requiredClassRef("scala.annotation.Annotation")
def AnnotationClass(implicit ctx: Context) = AnnotationType.symbol.asClass
lazy val ClassfileAnnotationType = ctx.requiredClassRef("scala.annotation.ClassfileAnnotation")
def ClassfileAnnotationClass(implicit ctx: Context) = ClassfileAnnotationType.symbol.asClass
lazy val StaticAnnotationType = ctx.requiredClassRef("scala.annotation.StaticAnnotation")
def StaticAnnotationClass(implicit ctx: Context) = StaticAnnotationType.symbol.asClass
// Annotation classes
lazy val AliasAnnotType = ctx.requiredClassRef("scala.annotation.internal.Alias")
def AliasAnnot(implicit ctx: Context) = AliasAnnotType.symbol.asClass
lazy val AnnotationDefaultAnnotType = ctx.requiredClassRef("scala.annotation.internal.AnnotationDefault")
def AnnotationDefaultAnnot(implicit ctx: Context) = AnnotationDefaultAnnotType.symbol.asClass
lazy val BodyAnnotType = ctx.requiredClassRef("scala.annotation.internal.Body")
def BodyAnnot(implicit ctx: Context) = BodyAnnotType.symbol.asClass
lazy val ChildAnnotType = ctx.requiredClassRef("scala.annotation.internal.Child")
def ChildAnnot(implicit ctx: Context) = ChildAnnotType.symbol.asClass
lazy val CovariantBetweenAnnotType = ctx.requiredClassRef("scala.annotation.internal.CovariantBetween")
def CovariantBetweenAnnot(implicit ctx: Context) = CovariantBetweenAnnotType.symbol.asClass
lazy val ContravariantBetweenAnnotType = ctx.requiredClassRef("scala.annotation.internal.ContravariantBetween")
def ContravariantBetweenAnnot(implicit ctx: Context) = ContravariantBetweenAnnotType.symbol.asClass
lazy val DeprecatedAnnotType = ctx.requiredClassRef("scala.deprecated")
def DeprecatedAnnot(implicit ctx: Context) = DeprecatedAnnotType.symbol.asClass
lazy val ImplicitNotFoundAnnotType = ctx.requiredClassRef("scala.annotation.implicitNotFound")
def ImplicitNotFoundAnnot(implicit ctx: Context) = ImplicitNotFoundAnnotType.symbol.asClass
lazy val InlineAnnotType = ctx.requiredClassRef("scala.inline")
def InlineAnnot(implicit ctx: Context) = InlineAnnotType.symbol.asClass
lazy val InlineParamAnnotType = ctx.requiredClassRef("scala.annotation.internal.InlineParam")
def InlineParamAnnot(implicit ctx: Context) = InlineParamAnnotType.symbol.asClass
lazy val InvariantBetweenAnnotType = ctx.requiredClassRef("scala.annotation.internal.InvariantBetween")
def InvariantBetweenAnnot(implicit ctx: Context) = InvariantBetweenAnnotType.symbol.asClass
lazy val MigrationAnnotType = ctx.requiredClassRef("scala.annotation.migration")
def MigrationAnnot(implicit ctx: Context) = MigrationAnnotType.symbol.asClass
lazy val NativeAnnotType = ctx.requiredClassRef("scala.native")
def NativeAnnot(implicit ctx: Context) = NativeAnnotType.symbol.asClass
lazy val RemoteAnnotType = ctx.requiredClassRef("scala.remote")
def RemoteAnnot(implicit ctx: Context) = RemoteAnnotType.symbol.asClass
lazy val RepeatedAnnotType = ctx.requiredClassRef("scala.annotation.internal.Repeated")
def RepeatedAnnot(implicit ctx: Context) = RepeatedAnnotType.symbol.asClass
lazy val SourceFileAnnotType = ctx.requiredClassRef("scala.annotation.internal.SourceFile")
def SourceFileAnnot(implicit ctx: Context) = SourceFileAnnotType.symbol.asClass
lazy val ScalaSignatureAnnotType = ctx.requiredClassRef("scala.reflect.ScalaSignature")
def ScalaSignatureAnnot(implicit ctx: Context) = ScalaSignatureAnnotType.symbol.asClass
lazy val ScalaLongSignatureAnnotType = ctx.requiredClassRef("scala.reflect.ScalaLongSignature")
def ScalaLongSignatureAnnot(implicit ctx: Context) = ScalaLongSignatureAnnotType.symbol.asClass
lazy val ScalaStrictFPAnnotType = ctx.requiredClassRef("scala.annotation.strictfp")
def ScalaStrictFPAnnot(implicit ctx: Context) = ScalaStrictFPAnnotType.symbol.asClass
lazy val ScalaStaticAnnotType = ctx.requiredClassRef("scala.annotation.static")
def ScalaStaticAnnot(implicit ctx: Context) = ScalaStaticAnnotType.symbol.asClass
lazy val SerialVersionUIDAnnotType = ctx.requiredClassRef("scala.SerialVersionUID")
def SerialVersionUIDAnnot(implicit ctx: Context) = SerialVersionUIDAnnotType.symbol.asClass
lazy val TASTYSignatureAnnotType = ctx.requiredClassRef("scala.annotation.internal.TASTYSignature")
def TASTYSignatureAnnot(implicit ctx: Context) = TASTYSignatureAnnotType.symbol.asClass
lazy val TASTYLongSignatureAnnotType = ctx.requiredClassRef("scala.annotation.internal.TASTYLongSignature")
def TASTYLongSignatureAnnot(implicit ctx: Context) = TASTYLongSignatureAnnotType.symbol.asClass
lazy val TailrecAnnotType = ctx.requiredClassRef("scala.annotation.tailrec")
def TailrecAnnot(implicit ctx: Context) = TailrecAnnotType.symbol.asClass
lazy val SwitchAnnotType = ctx.requiredClassRef("scala.annotation.switch")
def SwitchAnnot(implicit ctx: Context) = SwitchAnnotType.symbol.asClass
lazy val ThrowsAnnotType = ctx.requiredClassRef("scala.throws")
def ThrowsAnnot(implicit ctx: Context) = ThrowsAnnotType.symbol.asClass
lazy val TransientAnnotType = ctx.requiredClassRef("scala.transient")
def TransientAnnot(implicit ctx: Context) = TransientAnnotType.symbol.asClass
lazy val UncheckedAnnotType = ctx.requiredClassRef("scala.unchecked")
def UncheckedAnnot(implicit ctx: Context) = UncheckedAnnotType.symbol.asClass
lazy val UncheckedStableAnnotType = ctx.requiredClassRef("scala.annotation.unchecked.uncheckedStable")
def UncheckedStableAnnot(implicit ctx: Context) = UncheckedStableAnnotType.symbol.asClass
lazy val UncheckedVarianceAnnotType = ctx.requiredClassRef("scala.annotation.unchecked.uncheckedVariance")
def UncheckedVarianceAnnot(implicit ctx: Context) = UncheckedVarianceAnnotType.symbol.asClass
lazy val UnsafeNonvariantAnnotType = ctx.requiredClassRef("scala.annotation.internal.UnsafeNonvariant")
def UnsafeNonvariantAnnot(implicit ctx: Context) = UnsafeNonvariantAnnotType.symbol.asClass
lazy val VolatileAnnotType = ctx.requiredClassRef("scala.volatile")
def VolatileAnnot(implicit ctx: Context) = VolatileAnnotType.symbol.asClass
lazy val FieldMetaAnnotType = ctx.requiredClassRef("scala.annotation.meta.field")
def FieldMetaAnnot(implicit ctx: Context) = FieldMetaAnnotType.symbol.asClass
lazy val GetterMetaAnnotType = ctx.requiredClassRef("scala.annotation.meta.getter")
def GetterMetaAnnot(implicit ctx: Context) = GetterMetaAnnotType.symbol.asClass
lazy val SetterMetaAnnotType = ctx.requiredClassRef("scala.annotation.meta.setter")
def SetterMetaAnnot(implicit ctx: Context) = SetterMetaAnnotType.symbol.asClass
// convenient one-parameter method types
def methOfAny(tp: Type) = MethodType(List(AnyType), tp)
def methOfAnyVal(tp: Type) = MethodType(List(AnyValType), tp)
def methOfAnyRef(tp: Type) = MethodType(List(ObjectType), tp)
// Derived types
def RepeatedParamType = RepeatedParamClass.typeRef
def ThrowableType = ThrowableClass.typeRef
def ClassType(arg: Type)(implicit ctx: Context) = {
val ctype = ClassClass.typeRef
if (ctx.phase.erasedTypes) ctype else ctype.appliedTo(arg)
}
/** The enumeration type, goven a value of the enumeration */
def EnumType(sym: Symbol)(implicit ctx: Context) =
// given (in java): "class A { enum E { VAL1 } }"
// - sym: the symbol of the actual enumeration value (VAL1)
// - .owner: the ModuleClassSymbol of the enumeration (object E)
// - .linkedClass: the ClassSymbol of the enumeration (class E)
sym.owner.linkedClass.typeRef
object FunctionOf {
def apply(args: List[Type], resultType: Type, isImplicit: Boolean = false)(implicit ctx: Context) =
FunctionType(args.length, isImplicit).appliedTo(args ::: resultType :: Nil)
def unapply(ft: Type)(implicit ctx: Context) = {
val tsym = ft.typeSymbol
if (isFunctionClass(tsym)) {
val targs = ft.dealias.argInfos
Some(targs.init, targs.last, tsym.name.isImplicitFunction)
}
else None
}
}
object ArrayOf {
def apply(elem: Type)(implicit ctx: Context) =
if (ctx.erasedTypes) JavaArrayType(elem)
else ArrayType.appliedTo(elem :: Nil)
def unapply(tp: Type)(implicit ctx: Context): Option[Type] = tp.dealias match {
case at: RefinedType if (at isRef ArrayType.symbol) && at.argInfos.length == 1 => Some(at.argInfos.head)
case _ => None
}
}
/** An extractor for multi-dimensional arrays.
* Note that this will also extract the high bound if an
* element type is a wildcard. E.g.
*
* Array[_ <: Array[_ <: Number]]
*
* would match
*
* MultiArrayOf(<Number>, 2)
*/
object MultiArrayOf {
def apply(elem: Type, ndims: Int)(implicit ctx: Context): Type =
if (ndims == 0) elem else ArrayOf(apply(elem, ndims - 1))
def unapply(tp: Type)(implicit ctx: Context): Option[(Type, Int)] = tp match {
case ArrayOf(elemtp) =>
def recur(elemtp: Type): Option[(Type, Int)] = elemtp.dealias match {
case TypeBounds(lo, hi) => recur(hi)
case MultiArrayOf(finalElemTp, n) => Some(finalElemTp, n + 1)
case _ => Some(elemtp, 1)
}
recur(elemtp)
case _ =>
None
}
}
// ----- Symbol sets ---------------------------------------------------
lazy val AbstractFunctionType = mkArityArray("scala.runtime.AbstractFunction", MaxImplementedFunctionArity, 0)
val AbstractFunctionClassPerRun = new PerRun[Array[Symbol]](implicit ctx => AbstractFunctionType.map(_.symbol.asClass))
def AbstractFunctionClass(n: Int)(implicit ctx: Context) = AbstractFunctionClassPerRun()(ctx)(n)
private lazy val ImplementedFunctionType = mkArityArray("scala.Function", MaxImplementedFunctionArity, 0)
def FunctionClassPerRun = new PerRun[Array[Symbol]](implicit ctx => ImplementedFunctionType.map(_.symbol.asClass))
lazy val TupleType = mkArityArray("scala.Tuple", MaxTupleArity, 2)
lazy val ProductNType = mkArityArray("scala.Product", MaxTupleArity, 0)
def FunctionClass(n: Int, isImplicit: Boolean = false)(implicit ctx: Context) =
if (isImplicit) ctx.requiredClass("scala.ImplicitFunction" + n.toString)
else if (n <= MaxImplementedFunctionArity) FunctionClassPerRun()(ctx)(n)
else ctx.requiredClass("scala.Function" + n.toString)
lazy val Function0_applyR = ImplementedFunctionType(0).symbol.requiredMethodRef(nme.apply)
def Function0_apply(implicit ctx: Context) = Function0_applyR.symbol
def FunctionType(n: Int, isImplicit: Boolean = false)(implicit ctx: Context): TypeRef =
if (n <= MaxImplementedFunctionArity && (!isImplicit || ctx.erasedTypes)) ImplementedFunctionType(n)
else FunctionClass(n, isImplicit).typeRef
private lazy val TupleTypes: Set[TypeRef] = TupleType.toSet
private lazy val ProductTypes: Set[TypeRef] = ProductNType.toSet
/** If `cls` is a class in the scala package, its name, otherwise EmptyTypeName */
def scalaClassName(cls: Symbol)(implicit ctx: Context): TypeName =
if (cls.isClass && cls.owner == ScalaPackageClass) cls.asClass.name else EmptyTypeName
/** If type `ref` refers to a class in the scala package, its name, otherwise EmptyTypeName */
def scalaClassName(ref: Type)(implicit ctx: Context): TypeName = scalaClassName(ref.classSymbol)
private def isVarArityClass(cls: Symbol, prefix: String) =
scalaClassName(cls).testSimple(name =>
name.startsWith(prefix) &&
name.length > prefix.length &&
name.drop(prefix.length).forall(_.isDigit))
def isBottomClass(cls: Symbol) =
cls == NothingClass || cls == NullClass
def isBottomType(tp: Type) =
tp.derivesFrom(NothingClass) || tp.derivesFrom(NullClass)
/** Is a function class.
* - FunctionN for N >= 0
* - ImplicitFunctionN for N >= 0
*/
def isFunctionClass(cls: Symbol) = scalaClassName(cls).isFunction
/** Is an implicit function class.
* - ImplicitFunctionN for N >= 0
*/
def isImplicitFunctionClass(cls: Symbol) = scalaClassName(cls).isImplicitFunction
/** Is a class that will be erased to FunctionXXL
* - FunctionN for N >= 22
* - ImplicitFunctionN for N >= 22
*/
def isXXLFunctionClass(cls: Symbol) = scalaClassName(cls).functionArity > MaxImplementedFunctionArity
/** Is a synthetic function class
* - FunctionN for N > 22
* - ImplicitFunctionN for N >= 0
*/
def isSyntheticFunctionClass(cls: Symbol) = scalaClassName(cls).isSyntheticFunction
def isAbstractFunctionClass(cls: Symbol) = isVarArityClass(cls, str.AbstractFunction)
def isTupleClass(cls: Symbol) = isVarArityClass(cls, str.Tuple)
def isProductClass(cls: Symbol) = isVarArityClass(cls, str.Product)
/** Returns the erased class of the function class `cls`
* - FunctionN for N > 22 becomes FunctionXXL
* - FunctionN for 22 > N >= 0 remains as FunctionN
* - ImplicitFunctionN for N > 22 becomes FunctionXXL
* - ImplicitFunctionN for 22 > N >= 0 becomes FunctionN
* - anything else becomes a NoSymbol
*/
def erasedFunctionClass(cls: Symbol): Symbol = {
val arity = scalaClassName(cls).functionArity
if (arity > 22) defn.FunctionXXLClass
else if (arity >= 0) defn.FunctionClass(arity)
else NoSymbol
}
/** Returns the erased type of the function class `cls`
* - FunctionN for N > 22 becomes FunctionXXL
* - FunctionN for 22 > N >= 0 remains as FunctionN
* - ImplicitFunctionN for N > 22 becomes FunctionXXL
* - ImplicitFunctionN for 22 > N >= 0 becomes FunctionN
* - anything else becomes a NoType
*/
def erasedFunctionType(cls: Symbol): Type = {
val arity = scalaClassName(cls).functionArity
if (arity > 22) defn.FunctionXXLType
else if (arity >= 0) defn.FunctionType(arity)
else NoType
}
val predefClassNames: Set[Name] =
Set("Predef$", "DeprecatedPredef", "LowPriorityImplicits").map(_.toTypeName)
/** Is `cls` the predef module class, or a class inherited by Predef? */
def isPredefClass(cls: Symbol) =
(cls.owner eq ScalaPackageClass) && predefClassNames.contains(cls.name)
val StaticRootImportFns = List[() => TermRef](
() => JavaLangPackageVal.termRef,
() => ScalaPackageVal.termRef
)
val PredefImportFns = List[() => TermRef](
() => ScalaPredefModuleRef,
() => DottyPredefModuleRef
)
lazy val RootImportFns =
if (ctx.settings.YnoImports.value) List.empty[() => TermRef]
else if (ctx.settings.YnoPredef.value) StaticRootImportFns
else StaticRootImportFns ++ PredefImportFns
lazy val ShadowableImportNames = Set("Predef", "DottyPredef").map(_.toTermName)
lazy val RootImportTypes = RootImportFns.map(_())
/** Modules whose members are in the default namespace and their module classes */
lazy val UnqualifiedOwnerTypes: Set[NamedType] =
RootImportTypes.toSet[NamedType] ++ RootImportTypes.map(_.symbol.moduleClass.typeRef)
lazy val PhantomClasses = Set[Symbol](AnyClass, AnyValClass, NullClass, NothingClass)
/** Classes that are known not to have an initializer irrespective of
* whether NoInits is set. Note: FunctionXXLClass is in this set
* because if it is compiled by Scala2, it does not get a NoInit flag.
* But since it is introduced only at erasure, there's no chance
* for augmentScala2Traits to do anything on a class that inherits it. So
* it also misses an implementation class, which means that the usual scheme
* of calling a superclass init in the implementation class of a Scala2
* trait gets screwed up. Therefore, it is mandatory that FunctionXXL
* is treated as a NoInit trait.
*/
lazy val NoInitClasses = PhantomClasses + FunctionXXLClass
def isPolymorphicAfterErasure(sym: Symbol) =
(sym eq Any_isInstanceOf) || (sym eq Any_asInstanceOf)
def isTupleType(tp: Type)(implicit ctx: Context) = {
val arity = tp.dealias.argInfos.length
arity <= MaxTupleArity && TupleType(arity) != null && (tp isRef TupleType(arity).symbol)
}
def tupleType(elems: List[Type]) = {
TupleType(elems.size).appliedTo(elems)
}
/** Is `tp` (an alias) of either a scala.FunctionN or a scala.ImplicitFunctionN? */
def isFunctionType(tp: Type)(implicit ctx: Context) = {
val arity = functionArity(tp)
val sym = tp.dealias.typeSymbol
arity >= 0 && isFunctionClass(sym) && tp.isRef(FunctionType(arity, sym.name.isImplicitFunction).typeSymbol)
}
def functionArity(tp: Type)(implicit ctx: Context) = tp.dealias.argInfos.length - 1
def isImplicitFunctionType(tp: Type)(implicit ctx: Context) =
isFunctionType(tp) && tp.dealias.typeSymbol.name.isImplicitFunction
// ----- primitive value class machinery ------------------------------------------
/** This class would also be obviated by the implicit function type design */
class PerRun[T](generate: Context => T) {
private var current: RunId = NoRunId
private var cached: T = _
def apply()(implicit ctx: Context): T = {
if (current != ctx.runId) {
cached = generate(ctx)
current = ctx.runId
}
cached
}
}
lazy val ScalaNumericValueTypeList = List(
ByteType, ShortType, CharType, IntType, LongType, FloatType, DoubleType)
private lazy val ScalaNumericValueTypes: collection.Set[TypeRef] = ScalaNumericValueTypeList.toSet
private lazy val ScalaValueTypes: collection.Set[TypeRef] = ScalaNumericValueTypes + UnitType + BooleanType
private lazy val ScalaBoxedTypes = ScalaValueTypes map (t => boxedTypes(t.name))
val ScalaNumericValueClasses = new PerRun[collection.Set[Symbol]](implicit ctx => ScalaNumericValueTypes.map(_.symbol))
val ScalaValueClasses = new PerRun[collection.Set[Symbol]](implicit ctx => ScalaValueTypes.map(_.symbol))
val ScalaBoxedClasses = new PerRun[collection.Set[Symbol]](implicit ctx => ScalaBoxedTypes.map(_.symbol))
private val boxedTypes = mutable.Map[TypeName, TypeRef]()
private val valueTypeEnc = mutable.Map[TypeName, PrimitiveClassEnc]()
// private val unboxedTypeRef = mutable.Map[TypeName, TypeRef]()
// private val javaTypeToValueTypeRef = mutable.Map[Class[_], TypeRef]()
// private val valueTypeNameToJavaType = mutable.Map[TypeName, Class[_]]()
private def valueTypeRef(name: String, boxed: TypeRef, jtype: Class[_], enc: Int): TypeRef = {
val vcls = ctx.requiredClassRef(name)
boxedTypes(vcls.name) = boxed
valueTypeEnc(vcls.name) = enc
// unboxedTypeRef(boxed.name) = vcls
// javaTypeToValueTypeRef(jtype) = vcls
// valueTypeNameToJavaType(vcls.name) = jtype
vcls
}
/** The type of the boxed class corresponding to primitive value type `tp`. */
def boxedType(tp: Type)(implicit ctx: Context): TypeRef = boxedTypes(scalaClassName(tp))
type PrimitiveClassEnc = Int
val ByteEnc = 2
val ShortEnc = ByteEnc * 3
val CharEnc = 5
val IntEnc = ShortEnc * CharEnc
val LongEnc = IntEnc * 7
val FloatEnc = LongEnc * 11
val DoubleEnc = FloatEnc * 13
val BooleanEnc = 17
val UnitEnc = 19
def isValueSubType(tref1: TypeRef, tref2: TypeRef)(implicit ctx: Context) =
valueTypeEnc(tref2.name) % valueTypeEnc(tref1.name) == 0
def isValueSubClass(sym1: Symbol, sym2: Symbol) =
valueTypeEnc(sym2.asClass.name) % valueTypeEnc(sym1.asClass.name) == 0
// ----- Initialization ---------------------------------------------------
/** Lists core classes that don't have underlying bytecode, but are synthesized on-the-fly in every reflection universe */
lazy val syntheticScalaClasses = List(
AnyClass,
AnyRefAlias,
RepeatedParamClass,
ByNameParamClass2x,
AnyValClass,
NullClass,
NothingClass,
SingletonClass,
EqualsPatternClass)
lazy val syntheticCoreClasses = syntheticScalaClasses ++ List(
EmptyPackageVal,
OpsPackageClass)
/** Lists core methods that don't have underlying bytecode, but are synthesized on-the-fly in every reflection universe */
lazy val syntheticCoreMethods = AnyMethods ++ ObjectMethods ++ List(String_+, throwMethod)
lazy val reservedScalaClassNames: Set[Name] = syntheticScalaClasses.map(_.name).toSet
private[this] var _isInitialized = false
private def isInitialized = _isInitialized
def init()(implicit ctx: Context) = {
this.ctx = ctx
if (!_isInitialized) {
// force initialization of every symbol that is synthesized or hijacked by the compiler
val forced = syntheticCoreClasses ++ syntheticCoreMethods ++ ScalaValueClasses()
// Enter all symbols from the scalaShadowing package in the scala package
for (m <- ScalaShadowingPackageClass.info.decls)
ScalaPackageClass.enter(m)
_isInitialized = true
}
}
}
