diff options
Diffstat (limited to 'node_modules/@babel/helper-validator-identifier/scripts')
-rw-r--r-- | node_modules/@babel/helper-validator-identifier/scripts/generate-identifier-regex.js | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/node_modules/@babel/helper-validator-identifier/scripts/generate-identifier-regex.js b/node_modules/@babel/helper-validator-identifier/scripts/generate-identifier-regex.js new file mode 100644 index 0000000..f644d77 --- /dev/null +++ b/node_modules/@babel/helper-validator-identifier/scripts/generate-identifier-regex.js @@ -0,0 +1,75 @@ +"use strict"; + +// Always use the latest available version of Unicode! +// https://tc39.github.io/ecma262/#sec-conformance +const version = "14.0.0"; + +const start = require("@unicode/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/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); +} + +function generate(chars) { + const astral = []; + let re = ""; + for (let i = 0, at = 0x10000; i < chars.length; i++) { + const from = chars[i]; + let to = from; + while (i < chars.length - 1 && chars[i + 1] == to + 1) { + i++; + to++; + } + if (to <= 0xffff) { + if (from == to) re += esc(from); + else if (from + 1 == to) re += esc(from) + esc(to); + else re += esc(from) + "-" + esc(to); + } else { + astral.push(from - at, to - from); + at = to; + } + } + return { nonASCII: re, astral: astral }; +} + +const startData = generate(start); +const contData = generate(cont); + +console.log("/* prettier-ignore */"); +console.log('let nonASCIIidentifierStartChars = "' + startData.nonASCII + '";'); +console.log("/* prettier-ignore */"); +console.log('let nonASCIIidentifierChars = "' + contData.nonASCII + '";'); +console.log("/* prettier-ignore */"); +console.log( + "const astralIdentifierStartCodes = " + JSON.stringify(startData.astral) + ";" +); +console.log("/* prettier-ignore */"); +console.log( + "const astralIdentifierCodes = " + JSON.stringify(contData.astral) + ";" +); |