scala3-compiler-bootstrapped/dotty.tools.dotc.transform/TreeChecker

TreeChecker

class TreeChecker extends Phase with SymTransformer

Run by -Ycheck option after a given phase, this class retypes all syntax trees and verifies that the type of each tree node so obtained conforms to the type found in the tree node. It also performs the following checks:

  • The owner of each definition is the same as the owner of the current typing context.
  • Ident nodes do not refer to a denotation that would need a select to be accessible (see tpd.needsSelect).
  • After typer, identifiers and select nodes refer to terms only (all types should be represented as TypeTrees then).
Companion:
object
class Phase
class Object
trait Matchable
class Any

Type members

Classlikes

class Checker(phasesToCheck: Seq[Phase]) extends ReTyper with Checking

Value members

Concrete methods

def assertSelectWrapsNew(tree: Tree)(using Context): Unit

Checks that New nodes are always wrapped inside Select nodes.

Checks that New nodes are always wrapped inside Select nodes.

def check(phasesToRun: Seq[Phase], ctx: Context): Tree
def run(using Context): Unit
def testDuplicate(sym: Symbol, registry: Map[String, Symbol], typ: String)(using Context): Unit

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
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
final def patternTranslated: Boolean
Inherited from:
Phase
def period: Period
Inherited from:
Phase
final def prev: Phase
Inherited from:
Phase
final def refChecked: Boolean
Inherited from:
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.

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
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

Concrete fields