Change to use Unicode regex

Author: wooorm

build.js

@@ -1,4 +1,6 @@
-import {start as startRe, cont as contRe} from './regex.js'
+const startRe = /[$_\p{ID_Start}]/u
+const contRe = /[$_\u{200C}\u{200D}\p{ID_Continue}]/u
+const re = /^[$_\p{ID_Start}][$_\u{200C}\u{200D}\p{ID_Continue}]*$/u
 
 /**
  * Checks if the given character code can start an identifier.
@@ -23,8 +25,7 @@ export function start(code) {
  */
 // To do: support astrals.
 export function cont(code) {
-  const character = String.fromCharCode(code)
-  return startRe.test(character) || contRe.test(character)
+  return contRe.test(String.fromCharCode(code))
 }
 
 /**
@@ -36,12 +37,5 @@ export function cont(code) {
  *   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
+  return re.test(name)
 }

lib/index.js

@@ -33,11 +33,8 @@
   ],
   "devDependencies": {
     "@types/node": "^20.0.0",
-    "@types/regenerate": "^1.0.0",
-    "@unicode/unicode-15.0.0": "^1.0.0",
     "c8": "^8.0.0",
     "prettier": "^3.0.0",
-    "regenerate": "^1.0.0",
     "remark-cli": "^11.0.0",
     "remark-preset-wooorm": "^9.0.0",
     "type-coverage": "^2.0.0",
@@ -46,12 +43,11 @@
   },
   "scripts": {
     "prepack": "npm run build && npm run format",
-    "generate": "node --conditions development build.js",
     "build": "tsc --build --clean && tsc --build && type-coverage",
     "format": "remark . -qfo && prettier . -w --log-level warn && xo --fix",
     "test-api": "node --conditions development test.js",
     "test-coverage": "c8 --check-coverage --100 --reporter lcov npm run test-api",
-    "test": "npm run generate && npm run build && npm run format && npm run test-coverage"
+    "test": "npm run build && npm run format && npm run test-coverage"
   },
   "prettier": {
     "tabWidth": 2,