chore: add playground

Author: dummdidumm

.gitignore

@@ -112,4 +112,5 @@ lib
 
 test262/yarn.lock
 test262/package-lock.json
-index.js
+/index.js
+/playground/output.json

package.json

@@ -18,7 +18,8 @@
 		"test:test262": "pnpm run build && node ./test/run_test262.js",
 		"changeset:version": "changeset version && git add --all",
 		"changeset:release": "changeset publish",
-		"prepublishOnly": "pnpm build"
+		"prepublishOnly": "pnpm build",
+		"playground": "pnpm build && node ./playground/index.js"
 	},
 	"exports": {
 		".": {

playground/index.js

@@ -0,0 +1,14 @@
+import * as fs from 'fs';
+import * as acorn from 'acorn';
+import { tsPlugin } from '../index.js';
+
+const parser = acorn.Parser.extend(tsPlugin());
+
+const content = fs.readFileSync('playground/input.ts', 'utf8');
+const output = parser.parse(content, {
+	sourceType: 'module',
+	ecmaVersion: 'latest',
+	locations: true
+});
+
+fs.writeFileSync('playground/output.json', JSON.stringify(output, null, 4));