planning

node_modules/unist-util-visit/index.js

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+'use strict'
+
+module.exports = visit
+
+var visitParents = require('unist-util-visit-parents')
+
+var CONTINUE = visitParents.CONTINUE
+var SKIP = visitParents.SKIP
+var EXIT = visitParents.EXIT
+
+visit.CONTINUE = CONTINUE
+visit.SKIP = SKIP
+visit.EXIT = EXIT
+
+function visit(tree, test, visitor, reverse) {
+  if (typeof test === 'function' && typeof visitor !== 'function') {
+    reverse = visitor
+    visitor = test
+    test = null
+  }
+
+  visitParents(tree, test, overload, reverse)
+
+  function overload(node, parents) {
+    var parent = parents[parents.length - 1]
+    var index = parent ? parent.children.indexOf(node) : null
+    return visitor(node, index, parent)
+  }
+}