🎉 initiate project *astro_rewrite*

node_modules/estree-util-is-identifier-name/lib/index.js

@@ -0,0 +1,47 @@
+import {start as startRe, cont as contRe} from './regex.js'
+
+/**
+ * Checks if the given character code can start an identifier.
+ *
+ * @param {number} code
+ *   Character code to check.
+ * @returns {boolean}
+ *   Whether `code` can start an identifier.
+ */
+// To do: support astrals.
+export function start(code) {
+  return startRe.test(String.fromCharCode(code))
+}
+
+/**
+ * Checks if the given character code can continue an identifier.
+ *
+ * @param {number} code
+ *   Character code to check.
+ * @returns {boolean}
+ *   Whether `code` can continue an identifier.
+ */
+// To do: support astrals.
+export function cont(code) {
+  const character = String.fromCharCode(code)
+  return startRe.test(character) || contRe.test(character)
+}
+
+/**
+ * Checks if the given value is a valid identifier name.
+ *
+ * @param {string} name
+ *   Identifier to check.
+ * @returns {boolean}
+ *   Whether `name` can be an identifier.
+ */
+export function name(name) {
+  let index = -1
+
+  while (++index < name.length) {
+    if (!(index ? cont : start)(name.charCodeAt(index))) return false
+  }
+
+  // `false` if `name` is empty.
+  return index > 0
+}