A type alias definition.

A type alias definition has the following components:

Examples:

alias Primitive => Boolean|Integer|Float|Character|String|Null;
alias AnyMutableSet<Element> given Element satisfies Object => Set<Element>&SetMutator<Element>;

no subtypes hierarchy

Initializer
TypeAliasDefinition(UIdentifier name, TypeSpecifier specifier, TypeParameters? typeParameters = null, TypeConstraint[] typeConstraints = [], Annotations annotations = ...)
Parameters:
  • name

    The name of the type alias.

  • specifier

    The specifier of the type alias.

  • typeParameters = null

    The type parameters of the type alias, if present.

  • typeConstraints = []

    The type constraints of the type alias, if any.

  • annotations = Annotations()

    The annotations of the type alias.

Attributes
annotationsSource Codeshared actual Annotations annotations

The annotations of the type alias.

childrenSource Codeshared actual <Annotations|UIdentifier|TypeParameters|TypeConstraint|TypeSpecifier>[] children

The child nodes of this node.

hashSource Codeshared 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.

Refines Object.hash
nameSource Codeshared actual UIdentifier name

The name of the type alias.

Refines TypeDeclaration.name ultimately refines Declaration.name
specifierSource Codeshared TypeSpecifier specifier

The specifier of the type alias.

typeConstraintsSource Codeshared actual TypeConstraint[] typeConstraints

The type constraints of the type alias, if any.

typeParametersSource Codeshared actual TypeParameters? typeParameters

The type parameters of the type alias, if present.

Inherited Attributes
Attributes inherited from: Node
Attributes inherited from: Object
Methods
copySource Codeshared TypeAliasDefinition copy(UIdentifier name = ..., TypeSpecifier specifier = ..., TypeParameters? typeParameters = ..., TypeConstraint[] typeConstraints = ..., Annotations annotations = ...)
Parameters:
  • name = this.name
  • specifier = this.specifier
  • typeParameters = this.typeParameters
  • typeConstraints = this.typeConstraints
  • annotations = this.annotations
equalsSource Codeshared 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.

transformSource Codeshared 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.

Inherited Methods
Methods inherited from: Node