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55 lines
1.7 KiB
55 lines
1.7 KiB
'use strict'; |
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// Which Unicode version should be used? |
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var version = '9.0.0'; |
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var start = require('unicode-' + version + '/Binary_Property/ID_Start/code-points.js') |
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.filter(function(ch) { return ch > 0x7f; }); |
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var last = -1; |
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var cont = [0x200c, 0x200d].concat(require('unicode-' + version + '/Binary_Property/ID_Continue/code-points.js') |
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.filter(function(ch) { return ch > 0x7f && search(start, ch, last + 1) == -1; })); |
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function search(arr, ch, starting) { |
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for (var i = starting; arr[i] <= ch && i < arr.length; last = i++) |
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if (arr[i] === ch) |
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return i; |
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return -1; |
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} |
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function pad(str, width) { |
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while (str.length < width) str = "0" + str; |
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return str; |
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} |
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function esc(code) { |
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var hex = code.toString(16); |
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if (hex.length <= 2) return "\\x" + pad(hex, 2); |
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else return "\\u" + pad(hex, 4); |
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} |
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function generate(chars) { |
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var astral = [], re = ""; |
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for (var i = 0, at = 0x10000; i < chars.length; i++) { |
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var from = chars[i], to = from; |
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while (i < chars.length - 1 && chars[i + 1] == to + 1) { |
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i++; |
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to++; |
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} |
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if (to <= 0xffff) { |
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if (from == to) re += esc(from); |
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else if (from + 1 == to) re += esc(from) + esc(to); |
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else re += esc(from) + "-" + esc(to); |
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} else { |
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astral.push(from - at, to - from); |
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at = to; |
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} |
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} |
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return {nonASCII: re, astral: astral}; |
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} |
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var startData = generate(start), contData = generate(cont); |
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console.log("let nonASCIIidentifierStartChars = \"" + startData.nonASCII + "\""); |
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console.log("let nonASCIIidentifierChars = \"" + contData.nonASCII + "\""); |
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console.log("const astralIdentifierStartCodes = " + JSON.stringify(startData.astral)); |
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console.log("const astralIdentifierCodes = " + JSON.stringify(contData.astral));
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