A small menubar app that allows you to switch between R versions quickly (if you have multiple versions of R framework installed).
https://rud.is/rswitch
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38 lines
1.3 KiB
38 lines
1.3 KiB
5 years ago
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// NodeVisitor.swift
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// SwiftSoup
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//
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// Created by Nabil Chatbi on 16/10/16.
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// Copyright © 2016 Nabil Chatbi.. All rights reserved.
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//
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import Foundation
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/**
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* Node visitor interface. Provide an implementing class to {@link NodeTraversor} to iterate through nodes.
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* <p>
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* This interface provides two methods, {@code head} and {@code tail}. The head method is called when the node is first
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* seen, and the tail method when all of the node's children have been visited. As an example, head can be used to
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* create a start tag for a node, and tail to create the end tag.
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* </p>
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*/
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public protocol NodeVisitor {
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/**
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* Callback for when a node is first visited.
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*
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* @param node the node being visited.
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* @param depth the depth of the node, relative to the root node. E.g., the root node has depth 0, and a child node
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* of that will have depth 1.
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*/
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func head(_ node: Node, _ depth: Int)throws
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/**
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* Callback for when a node is last visited, after all of its descendants have been visited.
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*
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* @param node the node being visited.
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* @param depth the depth of the node, relative to the root node. E.g., the root node has depth 0, and a child node
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* of that will have depth 1.
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*/
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func tail(_ node: Node, _ depth: Int)throws
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}
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