1"use strict";
2
3// Which Unicode version should be used?
4const version = "9.0.0";
5
6const start = require("unicode-" + version + "/Binary_Property/ID_Start/code-points.js")
7    .filter(function(ch) { return ch > 0x7f; });
8let last = -1;
9const cont = [0x200c, 0x200d].concat(
10  require("unicode-" + version + "/Binary_Property/ID_Continue/code-points.js")
11    .filter(function(ch) {
12      return ch > 0x7f && search(start, ch, last + 1) == -1;
13    })
14  );
15
16function search(arr, ch, starting) {
17  for (let i = starting; arr[i] <= ch && i < arr.length; last = i++)
18    if (arr[i] === ch)
19      return i;
20  return -1;
21}
22
23function pad(str, width) {
24  while (str.length < width) str = "0" + str;
25  return str;
26}
27
28function esc(code) {
29  const hex = code.toString(16);
30  if (hex.length <= 2) return "\\x" + pad(hex, 2);
31  else return "\\u" + pad(hex, 4);
32}
33
34function generate(chars) {
35  const astral = [];
36  let re = "";
37  for (let i = 0, at = 0x10000; i < chars.length; i++) {
38    const from = chars[i];
39    let to = from;
40    while (i < chars.length - 1 && chars[i + 1] == to + 1) {
41      i++;
42      to++;
43    }
44    if (to <= 0xffff) {
45      if (from == to) re += esc(from);
46      else if (from + 1 == to) re += esc(from) + esc(to);
47      else re += esc(from) + "-" + esc(to);
48    } else {
49      astral.push(from - at, to - from);
50      at = to;
51    }
52  }
53  return { nonASCII: re, astral: astral };
54}
55
56const startData = generate(start);
57const contData = generate(cont);
58
59console.log("let nonASCIIidentifierStartChars = \"" + startData.nonASCII + "\";");
60console.log("let nonASCIIidentifierChars = \"" + contData.nonASCII + "\";");
61console.log("const astralIdentifierStartCodes = " + JSON.stringify(startData.astral) + ";");
62console.log("const astralIdentifierCodes = " + JSON.stringify(contData.astral) + ";");
63