HasParentNode

An object that can have a parent node.

Functions

Walks the parents of this node and returns the first node of type type, or empty() if none is found.

open fun <N> ~~findAncestor~~(type: Class<N>, predicate: Predicate<N>): Optional<N>

Walks the parents of this node and returns the first node of type type that matches predicate, or empty() if none is found.

open fun <N> findAncestor(predicate: Predicate<N>, types: Array<Class<N>>): Optional<N>

Walks the parents of this node and returns the first node that matches one of types types, or empty() if none is found.

Returns the parent node, or Optional.empty if no parent is set.

Returns the parent node from the perspective of the children of this node.

Returns true if the parent has a parent

Determines whether this HasParentNode node is a descendant of the given node.

Was this observer registered?

abstract fun register(observer: AstObserver)

abstract fun setParentNode(parentNode: Node): T

Sets the parent node.

abstract fun unregister(observer: AstObserver)

Unregister an observer.