ExtensionMethods

Perform Step 1 in the inline classes SIP: Creates extension methods for all methods in a value class, except parameter or super accessors, or constructors.

Additionally, for a value class V, let U be the underlying type after erasure. We add to the companion module of V two cast methods: def u2evt$(x0: U): ErasedValueType(V, U) def evt2u$(x0: ErasedValueType(V, U)): U The casts are used in Erasure to make it typecheck, they are then removed in ElimErasedValueType. This is different from the implementation of value classes in Scala 2 (see SIP-15) which uses asInstanceOf which does not typecheck.

Finally, if the constructor of a value class is private pr protected it is widened to public.

Also, drop the Local flag from all private[this] and protected[this] members that will be moved to the companion object.

Companion:
object
class MiniPhase
class Phase
class Object
trait Matchable
class Any

Value members

Concrete methods

override def changesMembers: Boolean

Can this transform create or delete non-private members?

Can this transform create or delete non-private members?

Definition Classes
override def description: String
Definition Classes
override def phaseName: String

A name given to the Phase that can be used to debug the compiler. For instance, it is possible to print trees after a given phase using:

A name given to the Phase that can be used to debug the compiler. For instance, it is possible to print trees after a given phase using:

$ ./bin/scalac -Xprint:<phaseNameHere> sourceFile.scala
Definition Classes
override def runsAfter: Set[String]

List of names of phases that should precede this phase

List of names of phases that should precede this phase

Definition Classes

List of names of phases that should have finished their processing of all compilation units before this phase starts

List of names of phases that should have finished their processing of all compilation units before this phase starts

Definition Classes

The transformation method

The transformation method

Definition Classes
override def transformDefDef(tree: DefDef)(using Context): Tree
Definition Classes
override def transformTemplate(tree: Template)(using Context): Tree
Definition Classes

Inherited methods

final def <=(that: Phase): Boolean
Inherited from:
Phase

If set, implicit search is enabled

If set, implicit search is enabled

Inherited from:
Phase

Can this transform change the base types of a type?

Can this transform change the base types of a type?

Inherited from:
Phase

Can this transform change the parents of a class?

Can this transform change the parents of a class?

Inherited from:
Phase
def checkPostCondition(tree: Tree)(using Context): Unit

Check what the phase achieves, to be called at any point after it is finished.

Check what the phase achieves, to be called at any point after it is finished.

Inherited from:
Phase
Inherited from:
Phase
final def erasedTypes: Boolean
Inherited from:
Phase
Inherited from:
Phase
final def flatClasses: Boolean
Inherited from:
Phase
def forwarder(derived: TermSymbol, originalDef: DefDef, abstractOverClass: Boolean, liftThisType: Boolean)(using Context): Tree

A forwarder expression which calls derived, passing along

A forwarder expression which calls derived, passing along

  • if abstractOverClass the type parameters and enclosing class parameters of originalDef`,
  • the this of the enclosing class,
  • the value parameters of the original method originalDef.
Inherited from:
FullParameterization
def fullyParameterizedDef(derived: TermSymbol, originalDef: DefDef, abstractOverClass: Boolean)(using Context): Tree

Given an instance method definition originalDef, return a fully parameterized method definition derived from originalDef, which has derived as symbol and fullyParameterizedType(originalDef.symbol.info) as info. abstractOverClass defines weather the DefDef should abstract over type parameters of class that contained original defDef

Given an instance method definition originalDef, return a fully parameterized method definition derived from originalDef, which has derived as symbol and fullyParameterizedType(originalDef.symbol.info) as info. abstractOverClass defines weather the DefDef should abstract over type parameters of class that contained original defDef

Inherited from:
FullParameterization
def fullyParameterizedType(info: Type, clazz: ClassSymbol, abstractOverClass: Boolean, liftThisType: Boolean)(using Context): Type

Converts the type info of a member of class clazz to a method type that takes the this of the class and any type parameters of the class as additional parameters. Example:

Converts the type info of a member of class clazz to a method type that takes the this of the class and any type parameters of the class as additional parameters. Example:

class Foo[+A <: AnyRef](val xs: List[A]) extends AnyVal { def baz[B >: A](x: B): List[B] = ... }

leads to:

object Foo { def extension$baz[B >: A <: Any, A >: Nothing <: AnyRef]($this: Foo[A])(x: B): List[B] }

If a self type is present, $this has this self type as its type.

Value parameters:
abstractOverClass

if true, include the type parameters of the class in the method's list of type parameters.

liftThisType

if true, require created $this to be $this: (Foo[A] & Foo,this). This is needed if created member stays inside scope of Foo(as in tailrec)

Inherited from:
FullParameterization
final def hasNext: Boolean
Inherited from:
Phase
def id: Int

The sequence position of this phase in the given context where 0 is reserved for NoPhase and the first real phase is at position 1. -1 if the phase is not installed in the context.

The sequence position of this phase in the given context where 0 is reserved for NoPhase and the first real phase is at position 1. -1 if the phase is not installed in the context.

Inherited from:
Phase
Inherited from:
Phase

Output should be checkable by TreeChecker

Output should be checkable by TreeChecker

Inherited from:
Phase
Inherited from:
Phase
Inherited from:
Phase

Is this phase the standard typerphase? True for TyperPhase, but not for other first phases (such as FromTasty or Parser). The predicate is tested in some places that perform checks and corrections. It's different from ctx.isAfterTyper (and cheaper to test).

Is this phase the standard typerphase? True for TyperPhase, but not for other first phases (such as FromTasty or Parser). The predicate is tested in some places that perform checks and corrections. It's different from ctx.isAfterTyper (and cheaper to test).

Inherited from:
Phase
final def iterator: Iterator[Phase]
Inherited from:
Phase
Inherited from:
Phase
def lastPhaseId(using Context): Int

The last phase during which the transformed denotations are valid

The last phase during which the transformed denotations are valid

Inherited from:
DenotTransformer
final def monitor(doing: String)(body: => Unit)(using Context): Unit
Inherited from:
Phase
final def next: Phase
Inherited from:
Phase
Inherited from:
Phase
Inherited from:
Phase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def prepareForBind(tree: Bind)(using Context): Context
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def prepareForIf(tree: If)(using Context): Context
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def prepareForNew(tree: New)(using Context): Context
Inherited from:
MiniPhase
def prepareForOther(tree: Tree)(using Context): Context
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def prepareForStats(trees: List[Tree])(using Context): Context
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def prepareForThis(tree: This)(using Context): Context
Inherited from:
MiniPhase
def prepareForTry(tree: Try)(using Context): Context
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def prepareForUnit(tree: Tree)(using Context): Context
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
final def prev: Phase
Inherited from:
Phase
final def refChecked: Boolean
Inherited from:
Phase
final override def relaxedTyping: Boolean

If set, allow missing or superfluous arguments in applications and type applications.

If set, allow missing or superfluous arguments in applications and type applications.

Definition Classes
Inherited from:
MiniPhase

If set, use relaxed typing for all phases in group

If set, use relaxed typing for all phases in group

Inherited from:
MiniPhase
override def run(using Context): Unit
Definition Classes
Inherited from:
MiniPhase
Inherited from:
Phase
Inherited from:
Phase
Inherited from:
Phase
Inherited from:
Phase
protected def singletonGroup: MegaPhase
Inherited from:
MiniPhase
def start: Int
Inherited from:
Phase
override def toString: String

Returns a string representation of the object.

Returns a string representation of the object.

The default representation is platform dependent.

Returns:

a string representation of the object.

Definition Classes
Phase -> Any
Inherited from:
Phase
def transformAllDeep(tree: Tree)(using Context): Tree

Transform tree using all transforms of current group (including this one)

Transform tree using all transforms of current group (including this one)

Inherited from:
MiniPhase
Inherited from:
MiniPhase
def transformApply(tree: Apply)(using Context): Tree
Inherited from:
MiniPhase
def transformAssign(tree: Assign)(using Context): Tree
Inherited from:
MiniPhase
def transformBind(tree: Bind)(using Context): Tree
Inherited from:
MiniPhase
def transformBlock(tree: Block)(using Context): Tree
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def transformFollowing(tree: Tree)(using Context): Tree

Transform single node using all transforms following the current one in this group

Transform single node using all transforms following the current one in this group

Inherited from:
MiniPhase

Transform tree using all transforms following the current one in this group

Transform tree using all transforms following the current one in this group

Inherited from:
MiniPhase
def transformIdent(tree: Ident)(using Context): Tree
Inherited from:
MiniPhase
def transformIf(tree: If)(using Context): Tree
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def transformMatch(tree: Match)(using Context): Tree
Inherited from:
MiniPhase
def transformNew(tree: New)(using Context): Tree
Inherited from:
MiniPhase
def transformOther(tree: Tree)(using Context): Tree
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def transformReturn(tree: Return)(using Context): Tree
Inherited from:
MiniPhase
def transformSelect(tree: Select)(using Context): Tree
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def transformStats(trees: List[Tree])(using Context): List[Tree]
Inherited from:
MiniPhase
def transformSuper(tree: Super)(using Context): Tree
Inherited from:
MiniPhase
def transformThis(tree: This)(using Context): Tree
Inherited from:
MiniPhase
def transformTry(tree: Try)(using Context): Tree
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def transformTyped(tree: Typed)(using Context): Tree
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def transformUnit(tree: Tree)(using Context): Tree
Inherited from:
MiniPhase
def transformValDef(tree: ValDef)(using Context): Tree
Inherited from:
MiniPhase
Inherited from:
MiniPhase
def validFor(using Context): Period

The validity period of the transformed denotations in the given context

The validity period of the transformed denotations in the given context

Inherited from:
DenotTransformer

Inherited fields

Inherited from:
MiniPhase