lezer-ludus/test.js

import {parser} from "./parser.js"

const source = `
if foo
then bar else asdf
`

const parse = (source) => parser.parse(source.concat("\n"))

const tree = parse(source)

const cursor = tree.cursor()

const report = (out) => {
  console.log(out);
  return true;
}

const visit = (node) => {
  switch (node.type.name) {
    case "Script": return report("Starting Script");
    case "If": return report("Starting If");
    case "Word": return report(node.)

  }
}

cursor.iterate(
  (node) => (console.log("Entering", node.type.name), true),
  (node) => (console.log("Leaving", node.type.name))
)