| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960 | 'use strict';const fill = require('fill-range');const utils = require('./utils');const compile = (ast, options = {}) => {  const walk = (node, parent = {}) => {    const invalidBlock = utils.isInvalidBrace(parent);    const invalidNode = node.invalid === true && options.escapeInvalid === true;    const invalid = invalidBlock === true || invalidNode === true;    const prefix = options.escapeInvalid === true ? '\\' : '';    let output = '';    if (node.isOpen === true) {      return prefix + node.value;    }    if (node.isClose === true) {      console.log('node.isClose', prefix, node.value);      return prefix + node.value;    }    if (node.type === 'open') {      return invalid ? prefix + node.value : '(';    }    if (node.type === 'close') {      return invalid ? prefix + node.value : ')';    }    if (node.type === 'comma') {      return node.prev.type === 'comma' ? '' : invalid ? node.value : '|';    }    if (node.value) {      return node.value;    }    if (node.nodes && node.ranges > 0) {      const args = utils.reduce(node.nodes);      const range = fill(...args, { ...options, wrap: false, toRegex: true, strictZeros: true });      if (range.length !== 0) {        return args.length > 1 && range.length > 1 ? `(${range})` : range;      }    }    if (node.nodes) {      for (const child of node.nodes) {        output += walk(child, node);      }    }    return output;  };  return walk(ast);};module.exports = compile;
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