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|
package dotty.tools.backend.jvm
import dotty.tools.dotc.ast.tpd
import dotty.tools.dotc
import dotty.tools.dotc.backend.jvm.DottyPrimitives
import dotty.tools.dotc.core.Flags.FlagSet
import dotty.tools.dotc.transform.Erasure
import dotty.tools.dotc.transform.SymUtils._
import java.io.{File => JFile}
import scala.collection.generic.Clearable
import scala.collection.mutable
import scala.reflect.ClassTag
import scala.reflect.internal.util.WeakHashSet
import scala.reflect.io.{Directory, PlainDirectory, AbstractFile}
import scala.tools.asm.{ClassVisitor, FieldVisitor, MethodVisitor}
import scala.tools.nsc.backend.jvm.{BCodeHelpers, BackendInterface}
import dotty.tools.dotc.core._
import Periods._
import SymDenotations._
import Contexts._
import Types._
import Symbols._
import Denotations._
import Phases._
import java.lang.AssertionError
import dotty.tools.dotc.util.{Positions, DotClass}
import Decorators._
import tpd._
import StdNames.nme
class DottyBackendInterface()(implicit ctx: Context) extends BackendInterface{
trait NonExistentTree extends tpd.Tree
type Symbol = Symbols.Symbol
type Type = Types.Type
type Tree = tpd.Tree
type CompilationUnit = dotc.CompilationUnit
type Constant = Constants.Constant
type Literal = tpd.Literal
type Position = Positions.Position
type Name = Names.Name
type ClassDef = tpd.TypeDef
type TypeDef = tpd.TypeDef
type Apply = tpd.Apply
type TypeApply = tpd.TypeApply
type Try = tpd.Try
type Assign = tpd.Assign
type Ident = tpd.Ident
type If = tpd.If
type ValDef = tpd.ValDef
type Throw = tpd.Throw
type Return = tpd.Return
type Block = tpd.Block
type Typed = tpd.Typed
type Match = tpd.Match
type This = tpd.This
type CaseDef = tpd.CaseDef
type Alternative = tpd.Alternative
type DefDef = tpd.DefDef
type Template = tpd.Template
type Select = tpd.Select
type Bind = tpd.Bind
type New = tpd.New
type Super = tpd.Super
type Modifiers = tpd.Modifiers
type Annotation = NonExistentTree
type ArrayValue = NonExistentTree
type ApplyDynamic = NonExistentTree
type ModuleDef = NonExistentTree
type LabelDef = tpd.DefDef
val NoSymbol = Symbols.NoSymbol
val NoPosition: Position = Positions.NoPosition
val EmptyTree: Tree = tpd.EmptyTree
val UnitTag: ConstantTag = Constants.UnitTag
val IntTag: ConstantTag = Constants.IntTag
val FloatTag: ConstantTag = Constants.FloatTag
val NullTag: ConstantTag = Constants.NullTag
val BooleanTag: ConstantTag = Constants.BooleanTag
val ByteTag: ConstantTag = Constants.ByteTag
val ShortTag: ConstantTag = Constants.ShortTag
val CharTag: ConstantTag = Constants.CharTag
val DoubleTag: ConstantTag = Constants.DoubleTag
val LongTag: ConstantTag = Constants.LongTag
val StringTag: ConstantTag = Constants.StringTag
val ClazzTag: ConstantTag = Constants.ClazzTag
val EnumTag: ConstantTag = Constants.EnumTag
val nme_This: Name = StdNames.nme.This
val nme_EMPTY_PACKAGE_NAME: Name = StdNames.nme.EMPTY_PACKAGE
val nme_CONSTRUCTOR: Name = StdNames.nme.CONSTRUCTOR
val nme_WILDCARD: Name = StdNames.nme.WILDCARD
val nme_THIS: Name = StdNames.nme.THIS
val nme_PACKAGE: Name = StdNames.nme.PACKAGE
val nme_EQEQ_LOCAL_VAR: Name = StdNames.nme.EQEQ_LOCAL_VAR
val BoxesRunTimeModule = ctx.requiredModule("scala.runtime.BoxesRunTime")
val BoxesRunTimeClass = toDenot(BoxesRunTimeModule).moduleClass.asClass
val nme_valueOf: Name = StdNames.nme.valueOf
val NothingClass: Symbol = defn.NothingClass
val NullClass: Symbol = defn.NullClass
val ObjectClass: Symbol = defn.ObjectClass
val Object_isInstanceOf: Symbol = defn.Any_isInstanceOf
val Object_asInstanceOf: Symbol = defn.Any_asInstanceOf
val Object_equals: Symbol = defn.Any_equals
val ArrayClass: Symbol = defn.ArrayClass
val UnitClass: Symbol = defn.UnitClass
val BooleanClass: Symbol = defn.BooleanClass
val CharClass: Symbol = defn.CharClass
val ShortClass: Symbol = defn.ShortClass
val ClassClass: Symbol = defn.ClassClass
val ByteClass: Symbol = defn.ByteClass
val IntClass: Symbol = defn.IntClass
val LongClass: Symbol = defn.LongClass
val FloatClass: Symbol = defn.FloatClass
val DoubleClass: Symbol = defn.DoubleClass
val Array_clone: Symbol = defn.Array_clone
val hashMethodSym: Symbol = NoSymbol // used to dispatch ## on primitives to ScalaRuntime.hash. Should be implemented by a miniphase
val externalEqualsNumNum: Symbol = ctx.requiredMethod(BoxesRunTimeClass, nme.equalsNumNum)
lazy val externalEqualsNumChar: Symbol = ??? // ctx.requiredMethod(BoxesRunTimeClass, nme.equalsNumChar) // this method is private
val externalEqualsNumObject: Symbol = ctx.requiredMethod(BoxesRunTimeClass, nme.equalsNumObject)
val externalEquals: Symbol = ctx.requiredMethod(BoxesRunTimeClass, nme.equals_)
val MaxFunctionArity: Int = Definitions.MaxFunctionArity
val FunctionClass: Array[Symbol] = defn.FunctionClass.asInstanceOf[Array[Symbol]]
val AbstractFunctionClass: Array[Symbol] = defn.AbstractFunctionClass.asInstanceOf[Array[Symbol]]
val PartialFunctionClass: Symbol = defn.PartialFunctionClass
val AbstractPartialFunctionClass: Symbol = defn.AbstractPartialFunctionClass
val String_valueOf: Symbol = defn.String_valueOf_Object
def boxMethods: Map[Symbol, Symbol] = defn.ScalaValueClasses.map{x =>
(x, Erasure.Boxing.boxMethod(x.asClass))
}.toMap
def unboxMethods: Map[Symbol, Symbol] = defn.ScalaValueClasses.map(x => (x, Erasure.Boxing.unboxMethod(x.asClass))).toMap
private val mkArrayNames: Set[String] = Set("Byte", "Float", "Char", "Double", "Boolean", "Unit", "Long", "Int", "Short", "Ref")
override lazy val syntheticArrayConstructors: Set[Symbol] = mkArrayNames.map(nm => ctx.requiredMethod(toDenot(defn.DottyArraysModule).moduleClass.asClass, s"new${nm}Array"))
def isBox(sym: Symbol): Boolean = Erasure.Boxing.isBox(sym)
def isUnbox(sym: Symbol): Boolean = Erasure.Boxing.isUnbox(sym)
val primitives: Primitives = new Primitives {
val primitives = new DottyPrimitives(ctx)
def getPrimitive(app: Apply, reciever: Type): Int = primitives.getPrimitive(app, reciever)
def getPrimitive(sym: Symbol): Int = primitives.getPrimitive(sym)
def isPrimitive(sym: Symbol): Boolean = primitives.isPrimitive(sym)
}
implicit val TypeDefTag: ClassTag[TypeDef] = ClassTag[TypeDef](classOf[TypeDef])
implicit val ApplyTag: ClassTag[Apply] = ClassTag[Apply](classOf[Apply])
implicit val SelectTag: ClassTag[Select] = ClassTag[Select](classOf[Select])
implicit val TypeApplyTag: ClassTag[TypeApply] = ClassTag[TypeApply](classOf[TypeApply])
implicit val ClassDefTag: ClassTag[ClassDef] = ClassTag[TypeDef](classOf[TypeDef])
implicit val TryTag: ClassTag[Try] = ClassTag[Try](classOf[Try])
implicit val AssignTag: ClassTag[Assign] = ClassTag[Assign](classOf[Assign])
implicit val IdentTag: ClassTag[Ident] = ClassTag[Ident](classOf[Ident])
implicit val IfTag: ClassTag[If] = ClassTag[If](classOf[If])
implicit val LabelDefTag: ClassTag[LabelDef] = ClassTag[LabelDef](classOf[LabelDef])
implicit val ValDefTag: ClassTag[ValDef] = ClassTag[ValDef](classOf[ValDef])
implicit val ThrowTag: ClassTag[Throw] = ClassTag[Throw](classOf[Throw])
implicit val ReturnTag: ClassTag[Return] = ClassTag[Return](classOf[Return])
implicit val LiteralTag: ClassTag[Literal] = ClassTag[Literal](classOf[Literal])
implicit val BlockTag: ClassTag[Block] = ClassTag[Block](classOf[Block])
implicit val TypedTag: ClassTag[Typed] = ClassTag[Typed](classOf[Typed])
implicit val ArrayValueTag: ClassTag[ArrayValue] = ClassTag[ArrayValue](classOf[ArrayValue])
implicit val MatchTag: ClassTag[Match] = ClassTag[Match](classOf[Match])
implicit val CaseDefTag: ClassTag[CaseDef] = ClassTag[CaseDef](classOf[CaseDef])
implicit val ThisTag: ClassTag[This] = ClassTag[This](classOf[This])
implicit val AlternativeTag: ClassTag[Alternative] = ClassTag[Alternative](classOf[Alternative])
implicit val DefDefTag: ClassTag[DefDef] = ClassTag[DefDef](classOf[DefDef])
implicit val ModuleDefTag: ClassTag[ModuleDef] = ClassTag[ModuleDef](classOf[ModuleDef])
implicit val NameTag: ClassTag[Name] = ClassTag[Name](classOf[Name])
implicit val TemplateTag: ClassTag[Template] = ClassTag[Template](classOf[Template])
implicit val BindTag: ClassTag[Bind] = ClassTag[Bind](classOf[Bind])
implicit val NewTag: ClassTag[New] = ClassTag[New](classOf[New])
implicit val ApplyDynamicTag: ClassTag[ApplyDynamic] = ClassTag[ApplyDynamic](classOf[ApplyDynamic])
implicit val SuperTag: ClassTag[Super] = ClassTag[Super](classOf[Super])
implicit val ConstantClassTag: ClassTag[Constant] = ClassTag[Constant](classOf[Constant])
/* dont emit any annotations for now*/
def isRuntimeVisible(annot: Annotation): Boolean = false
def shouldEmitAnnotation(annot: Annotation): Boolean = false
def emitAnnotations(cw: ClassVisitor, annotations: List[Annotation], bcodeStore: BCodeHelpers)(innerClasesStore: bcodeStore.BCInnerClassGen): Unit = ()
def emitAnnotations(mw: MethodVisitor, annotations: List[Annotation], bcodeStore: BCodeHelpers)(innerClasesStore: bcodeStore.BCInnerClassGen): Unit = ()
def emitAnnotations(fw: FieldVisitor, annotations: List[Annotation], bcodeStore: BCodeHelpers)(innerClasesStore: bcodeStore.BCInnerClassGen): Unit = ()
def emitParamAnnotations(jmethod: MethodVisitor, pannotss: List[List[Annotation]], bcodeStore: BCodeHelpers)(innerClasesStore: bcodeStore.BCInnerClassGen): Unit = ()
def getAnnotPickle(jclassName: String, sym: Symbol): Option[Annotation] = None
def getRequiredClass(fullname: String): Symbol = ctx.requiredClass(fullname.toTermName)
def getClassIfDefined(fullname: String): Symbol = NoSymbol // used only for android. todo: implement
private def erasureString(clazz: Class[_]): String = {
if (clazz.isArray) "Array[" + erasureString(clazz.getComponentType) + "]"
else clazz.getName
}
def requiredClass[T](implicit evidence: ClassTag[T]): Symbol = {
ctx.requiredClass(erasureString(evidence.runtimeClass).toTermName)
}
def requiredModule[T](implicit evidence: ClassTag[T]): Symbol = {
ctx.requiredModule(erasureString(evidence.runtimeClass).toTermName)
}
def debuglog(msg: => String): Unit = ctx.debuglog(msg)
def informProgress(msg: String): Unit = ctx.informProgress(msg)
def log(msg: => String): Unit = ctx.log(msg)
def error(pos: Position, msg: String): Unit = ctx.error(msg, pos)
def warning(pos: Position, msg: String): Unit = ctx.warning(msg, pos)
def abort(msg: String): Nothing = {
ctx.error(msg)
throw new RuntimeException(msg)
}
def emitAsmp: Option[String] = None
def shouldEmitJumpAfterLabels = true
def dumpClasses: Option[String] =
if(ctx.settings.Ydumpclasses.isDefault) None
else Some(ctx.settings.Ydumpclasses.value)
def mainClass: Option[String] =
if (ctx.settings.mainClass.isDefault) None
else Some(ctx.settings.mainClass.value)
def setMainClass(name: String): Unit = ctx.settings.mainClass.update(name)
def noForwarders: Boolean = ctx.settings.noForwarders.value
def debuglevel: Int = 3 // 0 -> no debug info; 1-> filename; 2-> lines; 3-> varnames
def settings_debug: Boolean = ctx.settings.debug.value
def targetPlatform: String = ctx.settings.target.value
val perRunCaches: Caches = new Caches {
def newAnyRefMap[K <: AnyRef, V](): mutable.AnyRefMap[K, V] = new mutable.AnyRefMap[K, V]()
def newWeakMap[K, V](): mutable.WeakHashMap[K, V] = new mutable.WeakHashMap[K, V]()
def recordCache[T <: Clearable](cache: T): T = cache
def newWeakSet[K <: AnyRef](): WeakHashSet[K] = new WeakHashSet[K]()
def newMap[K, V](): mutable.HashMap[K, V] = new mutable.HashMap[K, V]()
def newSet[K](): mutable.Set[K] = new mutable.HashSet[K]
}
val MODULE_INSTANCE_FIELD: String = nme.MODULE_INSTANCE_FIELD.toString
def internalNameString(offset: Int, length: Int): String = new String(Names.chrs, offset, length)
def newTermName(prefix: String): Name = prefix.toTermName
val Flag_SYNTHETIC: Flags = Flags.Synthetic.bits
val Flag_METHOD: Flags = Flags.Method.bits
val ExcludedForwarderFlags: Flags = {
Flags.Specialized | Flags.Lifted | Flags.Protected | Flags.JavaStatic |
Flags.ExpandedName | Flags.Bridge | Flags.VBridge | Flags.Private | Flags.Macro
}.bits
def isQualifierSafeToElide(qual: Tree): Boolean = false // todo: implement
def getLabelDefOwners(t: Tree): Map[Tree, List[LabelDef]] = Map.empty
// todo: remove
def isMaybeBoxed(sym: Symbol) = {
(sym == ObjectClass) ||
(sym == JavaSerializableClass) ||
(sym == defn.ComparableClass) ||
(sym derivesFrom BoxedNumberClass) ||
(sym derivesFrom BoxedCharacterClass) ||
(sym derivesFrom BoxedBooleanClass)
}
def getSingleOutput: Option[AbstractFile] = None // todo: implement
def getGenericSignature(sym: Symbol, owner: Symbol): String = null // todo: implement
def getStaticForwarderGenericSignature(sym: Symbol, moduleClass: Symbol): String = null // todo: implement
def sourceFileFor(cu: CompilationUnit): String = cu.source.file.name
implicit def positionHelper(a: Position): PositionHelper = new PositionHelper {
def isDefined: Boolean = a.exists
def line: Int = sourcePos(a).line
def finalPosition: Position = a
}
implicit def constantHelper(a: Constant): ConstantHelper = new ConstantHelper {
def booleanValue: Boolean = a.booleanValue
def longValue: Long = a.longValue
def byteValue: Byte = a.byteValue
def stringValue: String = a.stringValue
def symbolValue: Symbol = a.symbolValue
def floatValue: Float = a.floatValue
def value: Any = a.value
def tag: ConstantTag = a.tag
def typeValue: Type = a.typeValue
def shortValue: Short = a.shortValue
def intValue: Int = a.intValue
def doubleValue: Double = a.doubleValue
def charValue: Char = a.charValue
}
implicit def treeHelper(a: Tree): TreeHelper = new TreeHelper {
def symbol: Symbol = a.symbol
def pos: Position = a.pos
def isEmpty: Boolean = a.isEmpty
def tpe: Type = a.tpe
def exists(pred: (Tree) => Boolean): Boolean = a.find(pred).isDefined
}
implicit def annotHelper(a: Annotation): AnnotationHelper = new AnnotationHelper {
def atp: Type = a.tree.tpe
def assocs: List[(Name, Object)] = ???
def symbol: Symbol = a.tree.symbol
def args: List[Tree] = ???
}
implicit def nameHelper(n: Name): NameHelper = new NameHelper {
def toTypeName: Name = n.toTypeName
def isTypeName: Boolean = n.isTypeName
def toTermName: Name = n.toTermName
def dropModule: Name = ???
def len: Int = n.length
def offset: Int = n.start
def isTermName: Boolean = n.isTermName
def startsWith(s: String): Boolean = n.startsWith(s)
}
implicit def symHelper(sym: Symbol): SymbolHelper = new SymbolHelper {
// names
def fullName(sep: Char): String = sym.showFullName
def fullName: String = sym.showFullName
def simpleName: Name = sym.name
def javaSimpleName: Name = toDenot(sym).name // addModuleSuffix(simpleName.dropLocal)
def javaBinaryName: Name = toDenot(sym).fullNameSeparated('/') // addModuleSuffix(fullNameInternal('/'))
def javaClassName: String = toDenot(sym).fullName.toString// addModuleSuffix(fullNameInternal('.')).toString
def name: Name = sym.name
def rawname: Name = sym.name // todo ????
// types
def info: Type = toDenot(sym).info
def tpe: Type = toDenot(sym).info // todo whats the differentce between tpe and info?
def thisType: Type = toDenot(sym).thisType
// tests
def isClass: Boolean = sym.isClass
def isType: Boolean = sym.isType
def isAnonymousClass: Boolean = toDenot(sym).isAnonymousClass
def isConstructor: Boolean = toDenot(sym).isConstructor
def isAnonymousFunction: Boolean = toDenot(sym).isAnonymousFunction
def isMethod: Boolean = sym is Flags.Method
def isPublic: Boolean = sym.flags.is(Flags.EmptyFlags, Flags.Private | Flags.Protected)
def isSynthetic: Boolean = sym is Flags.Synthetic
def isPackageClass: Boolean = sym is Flags.PackageClass
def isModuleClass: Boolean = sym is Flags.ModuleClass
def isModule: Boolean = sym is Flags.Module
def isStrictFP: Boolean = false // todo: implement
def isLabel: Boolean = sym is Flags.Label
def hasPackageFlag: Boolean = sym is Flags.Package
def isImplClass: Boolean = sym is Flags.ImplClass
def isInterface: Boolean = (sym is Flags.JavaInterface) || (sym is Flags.PureInterface)
def hasGetter: Boolean = false // used only for generaration of beaninfo todo: implement
def isGetter: Boolean = toDenot(sym).isGetter
def isSetter: Boolean = toDenot(sym).isSetter
def isGetClass: Boolean = sym eq defn.Any_getClass
def isJavaDefined: Boolean = sym is Flags.JavaDefined
def isDeferred: Boolean = sym is Flags.Deferred
def isPrivate: Boolean = sym is Flags.Private
def isFinal: Boolean = sym is Flags.Final
def isStaticMember: Boolean = (sym is Flags.JavaStatic) || (owner is Flags.ImplClass)
def isBottomClass: Boolean = (sym ne defn.NullClass) && (sym ne defn.NothingClass)
def isBridge: Boolean = sym is Flags.Bridge
def isArtifact: Boolean = sym is Flags.Artifact
def hasEnumFlag: Boolean = sym is Flags.Enum
def hasAccessBoundary: Boolean = sym.accessBoundary(defn.RootClass) ne defn.RootClass
def isVarargsMethod: Boolean = sym is Flags.JavaVarargs
def isDeprecated: Boolean = false
def isMutable: Boolean = sym is Flags.Mutable
def hasAbstractFlag: Boolean = sym is Flags.Abstract
def hasModuleFlag: Boolean = sym is Flags.Module
def isSynchronized: Boolean = sym is Flags.Synchronized
def isNonBottomSubClass(other: Symbol): Boolean = sym.derivesFrom(other)
def hasAnnotation(sym: Symbol): Boolean = false
def shouldEmitForwarders: Boolean = //exitingPickler { !(sym.name.toString contains '$')
(sym is Flags.Module) && !(sym is Flags.ImplClass) /// !sym.isNestedClass
def isJavaEntryPoint: Boolean = CollectEntryPoints.isJavaEntyPoint(sym)
def isClassConstructor: Boolean = sym.name == nme.CONSTRUCTOR
/**
* True for module classes of modules that are top-level or owned only by objects. Module classes
* for such objects will get a MODULE$ flag and a corresponding static initializer.
*/
def isStaticModuleClass: Boolean = sym.isStatic && (sym is Flags.Module)
def isStaticConstructor: Boolean = isStaticMember && isClassConstructor
// navigation
def owner: Symbol = toDenot(sym).owner
def rawowner: Symbol = owner
def originalOwner: Symbol = toDenot(sym)(ctx.withPhase(ctx.typerPhase)).owner
def parentSymbols: List[Symbol] = toDenot(sym).info.parents.map(_.typeSymbol)
def superClass: Symbol = toDenot(sym).superClass
def enclClass: Symbol = toDenot(sym).enclosingClass
def linkedClassOfClass: Symbol = toDenot(sym).companionModule
def linkedClass: Symbol = linkedClassOfClass //exitingPickler(sym.linkedClassOfClass)
def companionClass: Symbol = toDenot(sym).companionClass
def companionModule: Symbol = toDenot(sym).companionModule
def companionSymbol: Symbol = if (sym is Flags.Module) companionClass else companionModule
def moduleClass: Symbol = toDenot(sym).moduleClass
def enclosingClassSym: Symbol = enclClass //todo is handled specially for JavaDefined symbols in scalac
// members
def primaryConstructor: Symbol = toDenot(sym).primaryConstructor
def nestedClasses: List[Symbol] = memberClasses //exitingPhase(currentRun.lambdaliftPhase)(sym.memberClasses)
def memberClasses: List[Symbol] = toDenot(sym).info.memberClasses.map(_.symbol).toList
def annotations: List[Annotation] = Nil
def companionModuleMembers: List[Symbol] = {
// phase travel to exitingPickler: this makes sure that memberClassesOf only sees member classes,
// not local classes of the companion module (E in the exmaple) that were lifted by lambdalift.
if (linkedClass.isTopLevelModuleClass) /*exitingPickler*/ linkedClass.memberClasses
else Nil
}
def fieldSymbols: List[Symbol] = toDenot(sym).info.memberClasses.map(_.symbol).toList
def methodSymbols: List[Symbol] =
for (f <- toDenot(sym).info.decls.toList if !f.isMethod && f.isTerm && !f.isModule) yield f
def serialVUID: Option[Long] = None
def freshLocal(cunit: CompilationUnit, name: String, pos: Position, flags: Flags): Symbol = ???
def getter(clz: Symbol): Symbol = decorateSymbol(sym).getter
def setter(clz: Symbol): Symbol = decorateSymbol(sym).setter
def moduleSuffix: String = "" // todo: validate that names already have $ suffix
def outputDirectory: AbstractFile = new PlainDirectory(new Directory(new JFile(ctx.settings.d.value)))
def pos: Position = sym.pos
def throwsAnnotations: List[Symbol] = Nil
/**
* All interfaces implemented by a class, except for those inherited through the superclass.
*
*/
def superInterfaces: List[Symbol] = sym.mixins
/**
* True for module classes of package level objects. The backend will generate a mirror class for
* such objects.
*/
def isTopLevelModuleClass: Boolean = sym.isModuleClass && sym.isStatic
/**
* This is basically a re-implementation of sym.isStaticOwner, but using the originalOwner chain.
*
* The problem is that we are interested in a source-level property. Various phases changed the
* symbol's properties in the meantime, mostly lambdalift modified (destructively) the owner.
* Therefore, `sym.isStatic` is not what we want. For example, in
* object T { def f { object U } }
* the owner of U is T, so UModuleClass.isStatic is true. Phase travel does not help here.
*/
def isOriginallyStaticOwner: Boolean = sym.isStatic
def addRemoteRemoteExceptionAnnotation: Unit = ()
}
implicit def typeHelper(tp: Type): TypeHelper = new TypeHelper {
def member(string: Name): Symbol = tp.member(string.toTermName).symbol
def isFinalType: Boolean = tp.typeSymbol is Flags.Final //in scalac checks for type parameters. Why? Aren't they gone by backend?
def underlying: Type = tp match {
case t: TypeProxy => t.underlying
case _ => tp
}
def paramTypes: List[Type] = tp.firstParamTypes
def <:<(other: Type): Boolean = tp <:< other
def memberInfo(s: Symbol): Type = tp.memberInfo(s)
def decls: List[Symbol] = tp.decls.map(_.symbol).toList
def members: List[Symbol] =
tp.memberDenots(takeAllFilter, (name, buf) => buf ++= member(name).alternatives).map(_.symbol).toList
def typeSymbol: Symbol = tp.typeSymbol
def =:=(other: Type): Boolean = tp =:= other
def membersBasedOnFlags(excludedFlags: Flags, requiredFlags: Flags): List[Symbol] =
tp.membersBasedOnFlags(FlagSet(requiredFlags), FlagSet(excludedFlags)).map(_.symbol).toList
def resultType: Type = tp.resultType
def toTypeKind(ct: BCodeHelpers)(storage: ct.BCInnerClassGen): ct.bTypes.BType = {
import ct.bTypes._
val defn = ctx.definitions
import coreBTypes._
import Types._
/**
* Primitive types are represented as TypeRefs to the class symbol of, for example, scala.Int.
* The `primitiveTypeMap` maps those class symbols to the corresponding PrimitiveBType.
*/
def primitiveOrClassToBType(sym: Symbol): BType = {
assert(sym.isClass, sym)
assert(sym != ArrayClass || isCompilingArray, sym)
primitiveTypeMap.getOrElse(sym, storage.getClassBTypeAndRegisterInnerClass(sym.asInstanceOf[ct.int.Symbol]))
}
/**
* When compiling Array.scala, the type parameter T is not erased and shows up in method
* signatures, e.g. `def apply(i: Int): T`. A TyperRef to T is replaced by ObjectReference.
*/
def nonClassTypeRefToBType(sym: Symbol): ClassBType = {
assert(sym.isType && isCompilingArray, sym)
ObjectReference
}
tp.widenDealias match {
case JavaArrayType(el) =>ArrayBType(el.toTypeKind(ct)(storage)) // Array type such as Array[Int] (kept by erasure)
case t: TypeRef =>
t.info match {
case _ =>
if(!t.symbol.isClass) nonClassTypeRefToBType(t.symbol) // See comment on nonClassTypeRefToBType
else primitiveOrClassToBType(t.symbol) // Common reference to a type such as scala.Int or java.lang.String
}
case Types.ClassInfo(_, sym, _, _, _) => primitiveOrClassToBType(sym) // We get here, for example, for genLoadModule, which invokes toTypeKind(moduleClassSymbol.info)
case t: MethodType => // triggers for LabelDefs
t.resultType.toTypeKind(ct)(storage)
/* AnnotatedType should (probably) be eliminated by erasure. However we know it happens for
* meta-annotated annotations (@(ann @getter) val x = 0), so we don't emit a warning.
* The type in the AnnotationInfo is an AnnotatedTpe. Tested in jvm/annotations.scala.
*/
case a @ AnnotatedType(_, t) =>
debuglog(s"typeKind of annotated type $a")
t.toTypeKind(ct)(storage)
/* ExistentialType should (probably) be eliminated by erasure. We know they get here for
* classOf constants:
* class C[T]
* class T { final val k = classOf[C[_]] }
*/
/* case e @ ExistentialType(_, t) =>
debuglog(s"typeKind of existential type $e")
t.toTypeKind(ctx)(storage)*/
/* The cases below should probably never occur. They are kept for now to avoid introducing
* new compiler crashes, but we added a warning. The compiler / library bootstrap and the
* test suite don't produce any warning.
*/
case tp =>
ctx.warning(
s"an unexpected type representation reached the compiler backend while compiling $currentUnit: $tp. " +
"If possible, please file a bug on issues.scala-lang.org.")
tp match {
case ThisType(ArrayClass) => ObjectReference // was introduced in 9b17332f11 to fix SI-999, but this code is not reached in its test, or any other test
case ThisType(sym) => storage.getClassBTypeAndRegisterInnerClass(sym.asInstanceOf[ct.int.Symbol])
// case t: SingletonType => primitiveOrClassToBType(t.classSymbol)
case t: SingletonType => t.underlying.toTypeKind(ct)(storage)
case t: RefinedType => t.parent.toTypeKind(ct)(storage) //parents.map(_.toTypeKind(ct)(storage).asClassBType).reduceLeft((a, b) => a.jvmWiseLUB(b))
}
}
}
def summaryString: String = tp.showSummary
def params: List[Symbol] = Nil // used only for emmiting annotations
def parents: List[Type] = tp.parents
}
object Assign extends AssignDeconstructor {
def _1: Tree = field.lhs
def _2: Tree = field.rhs
}
object Select extends SelectDeconstructor {
def _1: Tree = field.qualifier
def _2: Name = field.name
}
object Apply extends ApplyDeconstructor {
def _1: Tree = field.fun
def _2: List[Tree] = field.args
}
object If extends IfDeconstructor {
def _1: Tree = field.cond
def _2: Tree = field.thenp
def _3: Tree = field.elsep
}
object ValDef extends ValDefDeconstructor {
def _1: Modifiers = field.mods
def _2: Name = field.name
def _3: Tree = field.tpt
def _4: Tree = field.rhs
}
object ApplyDynamic extends ApplyDynamicDeconstructor {
def _1: Tree = ???
def _2: List[Tree] = ???
}
// todo: this product1s should also eventually become name-based pattn matching
object Literal extends LiteralDeconstructor {
def unapply(a: Literal): Option[Constant] = Some(a.const)
}
object Throw extends ThrowDeconstructor {
def unapply(s: Throw): Option[Tree] = Some(s.expr)
}
object New extends NewDeconstructor {
def unapply(s: New): Option[Type] = Some(s.tpt.tpe)
}
object This extends ThisDeconstructor {
def unapply(s: This): Option[Name] = Some(s.qual)
def apply(s: Symbol): This = tpd.This(s.asClass)
}
object Return extends ReturnDeconstructor {
def unapply(s: Return): Option[Tree] = Some(s.expr)
}
object Ident extends IdentDeconstructor {
def unapply(s: Ident): Option[Name] = Some(s.name)
}
object Alternative extends AlternativeDeconstructor {
def unapply(s: Alternative): Option[List[Tree]] = Some(s.trees)
}
object Constant extends ConstantDeconstructor {
def unapply(a: Constant): Option[Any] = Some(a.value)
}
object ThrownException extends ThrownException {
def unapply(a: Annotation): Option[Symbol] = None // todo
}
object Try extends TryDeconstructor {
def _1: Tree = field.expr
def _2: List[Tree] = field.cases
def _3: Tree = field.finalizer
}
object LabelDef extends LabelDeconstructor {
def _1: Name = field.name
def _2: List[Symbol] = field.vparamss.flatMap(_.map(_.symbol))
def _3: Tree = field.rhs
override def unapply(s: LabelDef): DottyBackendInterface.this.LabelDef.type = {
if(s.symbol is Flags.Label) this.field = s
else this.field = null
this
}
}
object Typed extends TypedDeconstrutor {
def _1: Tree = field.expr
def _2: Tree = field.tpt
}
object Super extends SuperDeconstructor {
def _1: Tree = field.qual
def _2: Name = field.mix
}
object ArrayValue extends ArrayValueDeconstructor {
def _1: Tree = ???
def _2: List[Tree] = ???
}
object Match extends MatchDeconstructor {
def _1: Tree = field.selector
def _2: List[Tree] = field.cases
}
object Block extends BlockDeconstructor {
def _1: List[Tree] = field.stats
def _2: Tree = field.expr
}
object TypeApply extends TypeApplyDeconstructor {
def _1: Tree = field.fun
def _2: List[Tree] = field.args
}
object CaseDef extends CaseDeconstructor {
def _1: Tree = field.pat
def _2: Tree = field.guard
def _3: Tree = field.body
}
object DefDef extends DefDefDeconstructor {
def _1: Modifiers = field.mods
def _2: Name = field.name
def _3: List[TypeDef] = field.tparams
def _4: List[List[ValDef]] = field.vparamss
def _5: Tree = field.tpt
def _6: Tree = field.rhs
}
object ModuleDef extends ModuleDefDeconstructor {
def _1: Modifiers = ???
def _2: Name = ???
def _3: Tree = ???
}
object Template extends TemplateDeconstructor {
def _1: List[Tree] = field.parents
def _2: ValDef = field.self
def _3: List[Tree] = field.constr :: field.body
}
object Bind extends BindDeconstructor {
def _1: Name = field.name
def _2: Tree = field.body
}
object ClassDef extends ClassDefDeconstructor {
def _1: Modifiers = field.mods
def _2: Name = field.name
def _4: Template = field.rhs.asInstanceOf[Template]
def _3: List[TypeDef] = Nil
}
def currentUnit = ctx.compilationUnit
}
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