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Edit File: generate-identifier-regex.js

"use strict";

// Which Unicode version should be used?
const version = "9.0.0";

const start = require("unicode-" + version + "/Binary_Property/ID_Start/code-points.js")
    .filter(function(ch) { return ch > 0x7f; });
let last = -1;
const cont = [0x200c, 0x200d].concat(
  require("unicode-" + version + "/Binary_Property/ID_Continue/code-points.js")
    .filter(function(ch) {
      return ch > 0x7f && search(start, ch, last + 1) == -1;
    })
  );

function search(arr, ch, starting) {
  for (let i = starting; arr[i] <= ch && i < arr.length; last = i++)
    if (arr[i] === ch)
      return i;
  return -1;
}

function pad(str, width) {
  while (str.length < width) str = "0" + str;
  return str;
}

function esc(code) {
  const hex = code.toString(16);
  if (hex.length <= 2) return "\\x" + pad(hex, 2);
  else return "\\u" + pad(hex, 4);
}

const startData = generate(start);
const contData = generate(cont);

console.log("let nonASCIIidentifierStartChars = \"" + startData.nonASCII + "\";");
console.log("let nonASCIIidentifierChars = \"" + contData.nonASCII + "\";");
console.log("const astralIdentifierStartCodes = " + JSON.stringify(startData.astral) + ";");
console.log("const astralIdentifierCodes = " + JSON.stringify(contData.astral) + ";");

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