A class alias definition.

A class alias definition has the following components:

(While semantically, a class alias may never have case types or extend or satisfy other types, these nodes may syntactically still be present.)

Examples:

shared class VariadicString(Character* characters) => String(characters);
shared class MemberName(String name) => LIdentifier(name);

no subtypes hierarchy

Initializer
ClassAliasDefinition(UIdentifier name, Parameters parameters, ClassSpecifier specifier, CaseTypes? caseTypes = null, ExtendedType? extendedType = null, SatisfiedTypes? satisfiedTypes = null, TypeParameters? typeParameters = null, TypeConstraint[] typeConstraints = [], Annotations annotations = ...)
Parameters:
  • name

    The name of the class.

  • parameters

    The parameters of the class.

  • specifier

    The specifier of the class.

  • caseTypes = null

    The case types of the class.

    (In fact, a class alias may never have case types, but nevertheless it’s syntactically valid.)

  • extendedType = null

    The extended type of the class.

    (In fact, a class alias may never extend a class, but nevertheless it’s syntactically valid.)

  • satisfiedTypes = null

    The satisfied types of the class.

    (In fact, a class alias may never satisfy types, but nevertheless it’s syntactically valid.)

  • typeParameters = null

    The type parameters of the class.

  • typeConstraints = []

    The type constraints on the class’ type parameters.

  • annotations = Annotations()

    The annotations of the class.

Attributes
annotationsshared actual Annotations annotations

The annotations of the class.

caseTypesshared actual CaseTypes? caseTypes

The case types of the class.

(In fact, a class alias may never have case types, but nevertheless it’s syntactically valid.)

childrenshared actual <Annotations|UIdentifier|TypeParameters|Parameters|CaseTypes|ExtendedType|SatisfiedTypes|TypeConstraint|ClassSpecifier>[] children

The child nodes of this node.

extendedTypeshared actual ExtendedType? extendedType

The extended type of the class.

(In fact, a class alias may never extend a class, but nevertheless it’s syntactically valid.)

hashshared actual Integer hash

The hash value of the value, which allows the value to be an element of a hash-based set or key of a hash-based map. Implementations must respect the constraint that:

  • if x==y then x.hash==y.hash.

Therefore, a class which refines equals must also refine hash.

Because the Integer type is platform-dependent a compiler for a given platform is permitted to further manipulate the calculated hash for an object, and the resulting hash may differ between platforms.

Refines Object.hash
nameshared actual UIdentifier name

The name of the class.

Refines TypeDeclaration.name ultimately refines Declaration.name
parametersshared actual Parameters parameters

The parameters of the class.

satisfiedTypesshared actual SatisfiedTypes? satisfiedTypes

The satisfied types of the class.

(In fact, a class alias may never satisfy types, but nevertheless it’s syntactically valid.)

specifiershared ClassSpecifier specifier

The specifier of the class.

typeConstraintsshared actual TypeConstraint[] typeConstraints

The type constraints on the class’ type parameters.

typeParametersshared actual TypeParameters? typeParameters

The type parameters of the class.

Inherited Attributes
Attributes inherited from: AnyClass
Attributes inherited from: ClassOrInterface
Attributes inherited from: Declaration
Attributes inherited from: Node
Attributes inherited from: Object
hash, string
Attributes inherited from: TypeDeclaration
Methods
copyshared ClassAliasDefinition copy(UIdentifier name = ..., Parameters parameters = ..., ClassSpecifier specifier = ..., CaseTypes? caseTypes = ..., ExtendedType? extendedType = ..., SatisfiedTypes? satisfiedTypes = ..., TypeParameters? typeParameters = ..., TypeConstraint[] typeConstraints = ..., Annotations annotations = ...)
Parameters:
  • name = this.name
  • parameters = this.parameters
  • specifier = this.specifier
  • caseTypes = this.caseTypes
  • extendedType = this.extendedType
  • satisfiedTypes = this.satisfiedTypes
  • typeParameters = this.typeParameters
  • typeConstraints = this.typeConstraints
  • annotations = this.annotations
equalsshared actual Boolean equals(Object that)

Determine if two values are equal. Implementations should respect the constraints that:

  • if x===y then x==y (reflexivity),
  • if x==y then y==x (symmetry),
  • if x==y and y==z then x==z (transitivity).

Furthermore it is recommended that implementations ensure that if x==y then x and y have the same concrete class.

A class which explicitly refines equals() is said to support value equality, and the equality operator == is considered much more meaningful for such classes than for a class which simply inherits the default implementation of identity equality from Identifiable.

Refines Object.equals
transformshared actual Result transform<out Result>(Transformer<Result> transformer)

Transform this node with the given transformer by calling the appropriate transformX method on the transformer.

If you have a Node node that’s actually an LIdentifier instance, then the runtime will call LIdentifier.transform; therefore, this method is by nature narrowing. This means that if transformer is a NarrowingTransformer, calling node.transform(transformer) is equivalent to calling transformer.transformNode(node). On the other hand, if transformer is a WideningTransformer, then the two operations are very different.

visitshared actual void visit(Visitor visitor)

Visit this node with the given visitor. Calls the appropriate visitX method on the visitor.

Refines Node.visit
Inherited Methods
Methods inherited from: Node
Methods inherited from: Object
equals