RefChecks

Post-attribution checking and transformation, which fulfills the following roles

This phase performs the following checks.

only one overloaded alternative defines default arguments
applyDynamic methods are not overloaded
all overrides conform to rules laid down by checkAllOverrides.
any value classes conform to rules laid down by checkDerivedValueClass.
this(...) constructor calls do not forward reference other definitions in their block (not even lazy vals).
no forward reference in a local block jumps over a non-lazy val definition.
a class and its companion object do not both define a class or module with the same name.

2. It warns about references to symbols labeled deprecated or migration.

3. It performs the following transformations:

if (true) A else B --> A if (false) A else B --> B
macro definitions are eliminated.

4. It makes members not private where necessary. The following members cannot be private in the Java model:

term members of traits
the primary constructor of a value class
the parameter accessor of a value class
members accessed from an inner or companion class. All these members are marked as NotJavaPrivate. Unlike in Scala 2.x not-private members keep their name. It is up to the backend to find a unique expanded name for them. The rationale to do name changes that late is that they are very fragile.

todo: But RefChecks is not done yet. It's still a somewhat dirty port from the Scala 2 version. todo: move untrivial logic to their own mini-phases

Self Type: RefChecks

Linear Supertypes

MiniPhase, Phase, DotClass, AnyRef, Any

Instance Constructors

new RefChecks()

Type Members

class Transform extends TreeTransform

Value Members

final def !=(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def <=(that: Phase): Boolean

Definition Classes
Phase
final def ==(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def asInstanceOf[T0]: T0

Definition Classes
Any
def checkPostCondition(tree: ast.tpd.Tree)(implicit ctx: 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.

Definition Classes
Phase
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
def description: String

Definition Classes
Phase
def end: PhaseId

Definition Classes
Phase
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
final def erasedTypes: Boolean

Definition Classes
Phase
def exists: Boolean

Definition Classes
Phase
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def flatClasses: Boolean

Definition Classes
Phase
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
final def hasNext: Boolean

Definition Classes
Phase
def hashCode(): Int

Definition Classes
AnyRef → Any
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.
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.

Definition Classes
Phase
var idx: Int

id of this mini phase in group
id of this mini phase in group

Definition Classes
MiniPhase
def init(base: ContextBase, id: Int): Unit

Attributes
protected[dotty.tools.dotc.core.Phases]
Definition Classes
Phase
def init(base: ContextBase, start: Int, end: Int): Unit

Attributes
protected[dotty.tools.dotc.core.Phases]
Definition Classes
Phase
def isCheckable: Boolean

Output should be checkable by TreeChecker
Output should be checkable by TreeChecker

Definition Classes
Phase
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def isTyper: Boolean

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

Definition Classes
Phase
final def iterator: Iterator[Phase]

Definition Classes
Phase
final def labelsReordered: Boolean

Definition Classes
Phase
def mkTreeTransformer: TreeTransformer

Attributes
protected
Definition Classes
MiniPhase
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def next: Phase

Definition Classes
Phase
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
def period: Period

Definition Classes
Phase
def phaseName: String

Definition Classes
RefChecks → Phase
final def prev: Phase

Definition Classes
Phase
final def refChecked: Boolean

Definition Classes
Phase
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
Phase
def run(implicit ctx: Context): Unit

Definition Classes
MiniPhase → Phase
def runOn(units: List[CompilationUnit])(implicit ctx: Context): List[CompilationUnit]

Definition Classes
Phase
def runsAfter: Set[Class[_ <: Phase]]

List of names of phases that should precede this phase
List of names of phases that should precede this phase

Definition Classes
Phase
def runsAfterGroupsOf: Set[Class[_ <: Phase]]

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
MiniPhase
def start: Int

Definition Classes
Phase
final def symbolicRefs: Boolean

Definition Classes
Phase
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
Phase → AnyRef → Any
val treeTransform: Transform

Definition Classes
RefChecks → MiniPhase
def unsupported(methodName: String): Nothing

Throws an UnsupportedOperationException with the given method name.
Throws an UnsupportedOperationException with the given method name.

Definition Classes
DotClass
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

Related Docs: object RefChecks | package typer

class RefChecks extends DotClass with MiniPhase

Instance Constructors

new RefChecks()

Type Members

class Transform extends TreeTransform

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

final def <=(that: Phase): Boolean

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def checkPostCondition(tree: ast.tpd.Tree)(implicit ctx: Context): Unit

def clone(): AnyRef

def description: String

def end: PhaseId

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

final def erasedTypes: Boolean

def exists: Boolean

def finalize(): Unit

final def flatClasses: Boolean

final def getClass(): Class[_]

final def hasNext: Boolean

def hashCode(): Int

def id: Int

var idx: Int

def init(base: ContextBase, id: Int): Unit

def init(base: ContextBase, start: Int, end: Int): Unit

def isCheckable: Boolean

final def isInstanceOf[T0]: Boolean

def isTyper: Boolean

final def iterator: Iterator[Phase]

final def labelsReordered: Boolean

def mkTreeTransformer: TreeTransformer

final def ne(arg0: AnyRef): Boolean

final def next: Phase

final def notify(): Unit

final def notifyAll(): Unit

def period: Period

def phaseName: String

final def prev: Phase

final def refChecked: Boolean

def relaxedTyping: Boolean

def run(implicit ctx: Context): Unit

def runOn(units: List[CompilationUnit])(implicit ctx: Context): List[CompilationUnit]

def runsAfter: Set[Class[_ <: Phase]]

def runsAfterGroupsOf: Set[Class[_ <: Phase]]

def start: Int

final def symbolicRefs: Boolean

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

val treeTransform: Transform

def unsupported(methodName: String): Nothing

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Inherited from MiniPhase

Inherited from Phase

Inherited from DotClass

Inherited from AnyRef

Inherited from Any

Ungrouped