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48 lines
1.5 KiB
JavaScript
48 lines
1.5 KiB
JavaScript
// Note: run `npm install unicode-7.0.0` first.
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// Which Unicode version should be used?
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var version = '7.0.0';
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var start = require('unicode-' + version + '/properties/ID_Start/code-points')
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.filter(function(ch) { return ch > 127; });
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var cont = [0x200c, 0x200d].concat(require('unicode-' + version + '/properties/ID_Continue/code-points')
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.filter(function(ch) { return ch > 127 && start.indexOf(ch) == -1; }));
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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(" var nonASCIIidentifierStartChars = \"" + startData.nonASCII + "\";");
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console.log(" var nonASCIIidentifierChars = \"" + contData.nonASCII + "\";");
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console.log(" var astralIdentifierStartCodes = " + JSON.stringify(startData.astral) + ";");
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console.log(" var astralIdentifierCodes = " + JSON.stringify(contData.astral) + ";");
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