1 2const MAX_UNICODE_CODEPOINT = 0x10FFFF; 3const isStart = c => /[\p{ID_Start}\u{2118}\u{212E}\u{309B}\u{309C}]/u.test(c); // Other_ID_Start explicitly included for back compat - see http://www.unicode.org/reports/tr31/#Introduction 4const isPart = c => /[\p{ID_Continue}\u{00B7}\u{0387}\u{19DA}\u{1369}\u{136A}\u{136B}\u{136C}\u{136D}\u{136E}\u{136F}\u{1370}\u{1371}]/u.test(c) || isStart(c); // Likewise for Other_ID_Continue 5const parts = []; 6let partsActive = false; 7let startsActive = false; 8const starts = []; 9 10for (let i = 0; i < MAX_UNICODE_CODEPOINT; i++) { 11 if (isStart(String.fromCodePoint(i)) !== startsActive) { 12 starts.push(i - +startsActive); 13 startsActive = !startsActive; 14 } 15 if (isPart(String.fromCodePoint(i)) !== partsActive) { 16 parts.push(i - +partsActive); 17 partsActive = !partsActive; 18 } 19} 20 21console.log(`/** 22* Generated by scripts/regenerate-unicode-identifier-parts.js on node ${process.version} with unicode ${process.versions.unicode} 23* based on http://www.unicode.org/reports/tr31/ and https://www.ecma-international.org/ecma-262/6.0/#sec-names-and-keywords 24* unicodeESNextIdentifierStart corresponds to the ID_Start and Other_ID_Start property, and 25* unicodeESNextIdentifierPart corresponds to ID_Continue, Other_ID_Continue, plus ID_Start and Other_ID_Start 26*/`); 27console.log(`const unicodeESNextIdentifierStart = [${starts.join(", ")}];`); 28console.log(`const unicodeESNextIdentifierPart = [${parts.join(", ")}];`); 29