diff options
Diffstat (limited to 'tools/node_modules/eslint/node_modules/acorn-jsx/node_modules/acorn/bin/generate-identifier-regex.js')
-rw-r--r-- | tools/node_modules/eslint/node_modules/acorn-jsx/node_modules/acorn/bin/generate-identifier-regex.js | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/node_modules/acorn-jsx/node_modules/acorn/bin/generate-identifier-regex.js b/tools/node_modules/eslint/node_modules/acorn-jsx/node_modules/acorn/bin/generate-identifier-regex.js new file mode 100644 index 0000000000..100e8cf280 --- /dev/null +++ b/tools/node_modules/eslint/node_modules/acorn-jsx/node_modules/acorn/bin/generate-identifier-regex.js @@ -0,0 +1,55 @@ +'use strict'; + +// Which Unicode version should be used? +var version = '9.0.0'; + +var start = require('unicode-' + version + '/Binary_Property/ID_Start/code-points.js') + .filter(function(ch) { return ch > 0x7f; }); +var last = -1; +var cont = [0x200c, 0x200d].concat(require('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 (var 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) { + var hex = code.toString(16); + if (hex.length <= 2) return "\\x" + pad(hex, 2); + else return "\\u" + pad(hex, 4); +} + +function generate(chars) { + var astral = [], re = ""; + for (var i = 0, at = 0x10000; i < chars.length; i++) { + var from = chars[i], 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}; +} + +var startData = generate(start), contData = generate(cont); + +console.log("let nonASCIIidentifierStartChars = \"" + startData.nonASCII + "\""); +console.log("let nonASCIIidentifierChars = \"" + contData.nonASCII + "\""); +console.log("const astralIdentifierStartCodes = " + JSON.stringify(startData.astral)); +console.log("const astralIdentifierCodes = " + JSON.stringify(contData.astral)); |