@thi.ng/parse/xform/join.js

Purely functional parser combinators & AST generation for generic inputs

import { xform } from "../combinators/xform.js";
const xfJoin = (scope) => {
  if (!scope || !scope.children) return null;
  const res = [];
  for (let c of scope.children) {
    xfJoin(c);
    if (c.result) res.push(c.result);
  }
  scope.result = res.join("");
  scope.children = null;
  return scope;
};
const join = (parser) => xform(parser, xfJoin);
export {
  join,
  xfJoin
};