NodeVisitor

sealed external interface NodeVisitor(source)

A function that walks a node using the given visitor, lifting node arrays into single nodes, returning an node which satisfies the test.

If the input node is undefined, then the output is undefined.
If the visitor returns undefined, then the output is undefined.
If the output node is not undefined, then it will satisfy the test function.
In order to obtain a return type that is more specific than Node, a test function must be provided, and that function must be a type predicate.

For the canonical implementation of this type, @see {visitNode}.

Functions

abstract operator fun <TIn : Node?, TVisited : Node?, TOut : Node> invoke( node: TIn, visitor: Visitor<TIn & Any, TVisited>, test: (node: Node) -> Boolean, lift: (<Error class: unknown class><Node>) -> Node = definedExternally): Any

abstract operator fun <TIn : Node?, TVisited : Node?> invoke( node: TIn, visitor: Visitor<TIn & Any, TVisited>, test: (node: Node) -> Boolean = definedExternally, lift: (<Error class: unknown class><Node>) -> Node = definedExternally): Any