1 files changed, 62 insertions, 0 deletions
diff --git a/node_modules/babylon/bin/generate-identifier-regex.js b/node_modules/babylon/bin/generate-identifier-regex.js
new file mode 100644
index 0000000..9b0ae7d
--- /dev/null
+++ b/node_modules/babylon/bin/generate-identifier-regex.js
@@ -0,0 +1,62 @@
+"use strict";
+
+// Which Unicode version should be used?
+const version = "9.0.0";
+
+const start = require("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-" + 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("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) + ";");