scala3-compiler-bootstrapped/dotty.tools.dotc.transform/MegaPhase/MiniPhase

MiniPhase

abstract class MiniPhase extends Phase

The base class of tree transforms. For each kind of tree K, there are two methods which can be overridden:

prepareForK: return a new Context which gets passed to the node and its children transformK // transform node of type K

There are also prepare/transform hooks for

  • Stats: to prepare/transform a statement sequence in a block, template, or package def,
  • Unit : to prepare/transform a whole compilation unit
  • Other: to prepape/transform a tree that does not have a specific prepare/transform method pair.
class Phase
class Object
trait Matchable
class Any
class EtaReduce
class Flatten
class Getters
class LazyVals
class LiftTry
class Memoize
class Mixin
class PureStats
class TailRec
class RefChecks

Value members

Concrete methods

def prepareForBind(tree: Bind)(using Context): Context
def prepareForIf(tree: If)(using Context): Context
def prepareForNew(tree: New)(using Context): Context
def prepareForOther(tree: Tree)(using Context): Context
def prepareForStats(trees: List[Tree])(using Context): Context
def prepareForThis(tree: This)(using Context): Context
def prepareForTry(tree: Try)(using Context): Context
def prepareForUnit(tree: Tree)(using Context): Context
final override def relaxedTyping: Boolean
Definition Classes
def relaxedTypingInGroup: Boolean

If set, use relaxed typing for all phases in group

If set, use relaxed typing for all phases in group

override def run(using Context): Unit
Definition Classes
def runsAfterGroupsOf: Set[String]

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

protected def singletonGroup: MegaPhase
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)

def transformApply(tree: Apply)(using Context): Tree
def transformAssign(tree: Assign)(using Context): Tree
def transformBind(tree: Bind)(using Context): Tree
def transformBlock(tree: Block)(using Context): Tree
def transformDefDef(tree: DefDef)(using Context): Tree
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

def transformFollowingDeep(tree: Tree)(using Context): Tree

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

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

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

Inherited methods

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

If set, implicit search is enabled

If set, implicit search is enabled

Inherited from:
Phase
def changesBaseTypes: Boolean

Can this transform change the base types of a type?

Can this transform change the base types of a type?

Inherited from:
Phase
def changesMembers: Boolean

Can this transform create or delete non-private members?

Can this transform create or delete non-private members?

Inherited from:
Phase
def changesParents: Boolean

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
def description: String
Inherited from:
Phase
def end: PhaseId
Inherited from:
Phase
final def erasedTypes: Boolean
Inherited from:
Phase
def exists: Boolean
Inherited from:
Phase
final def flatClasses: Boolean
Inherited from:
Phase
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
def initContext(ctx: FreshContext): Unit
Inherited from:
Phase
def isCheckable: Boolean

Output should be checkable by TreeChecker

Output should be checkable by TreeChecker

Inherited from:
Phase
def isEnabled(using Context): Boolean
Inherited from:
Phase
def isRunnable(using Context): Boolean
Inherited from:
Phase
def isTyper: Boolean

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
final def lambdaLifted: Boolean
Inherited from:
Phase
final def monitor(doing: String)(body: => Unit)(using Context): Unit
Inherited from:
Phase
final def next: Phase
Inherited from:
Phase
final def patternTranslated: Boolean
Inherited from:
Phase
def period: Period
Inherited from:
Phase
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
Inherited from:
Phase
final def prev: Phase
Inherited from:
Phase
final def refChecked: Boolean
Inherited from:
Phase
def runOn(units: List[CompilationUnit])(using Context): List[CompilationUnit]
Inherited from:
Phase
def runsAfter: Set[String]

List of names of phases that should precede this phase

List of names of phases that should precede this phase

Inherited from:
Phase
final def sameBaseTypesStartId: Int
Inherited from:
Phase
final def sameMembersStartId: Int
Inherited from:
Phase
final def sameParentsStartId: Int
Inherited from:
Phase
def start: Int
Inherited from:
Phase
override def toString: String
Definition Classes
Phase -> Any
Inherited from:
Phase

Concrete fields