Add visitor

Author: juhojama

composer.json

@@ -13,8 +13,9 @@
         "php-stubs/wordpress-stubs": "^4.7 || ^5.0 || ^6.0"
     },
     "require-dev": {
-        "php": "~7.1",
-        "php-stubs/generator": "^0.8"
+        "php": "~7.1 || ^8.0",
+        "php-stubs/generator": "^0.8",
+        "phpdocumentor/reflection-docblock": "^5.3"
     },
     "suggest": {
         "symfony/polyfill-php73": "Symfony polyfill backporting some PHP 7.3+ features to lower PHP versions",

functionMap.php

@@ -0,0 +1,12 @@
+<?php
+
+/**
+ * This array is in the same format as the function map array in PHPStan:
+ *
+ * '<function_name>' => ['<return_type>', '<arg_name>'=>'<arg_type>']
+ *
+ * @link https://github.com/phpstan/phpstan-src/blob/1.5.x/resources/functionMap.php
+ */
+return [
+    'have_rows' => ['bool', '@phpstan-impure' => ''],
+];

generate.sh

@@ -16,6 +16,7 @@ fi
 
 "$(dirname "$0")/vendor/bin/generate-stubs" \
     --force \
+    --visitor=visitor.php \
     --finder=finder.php \
     --header="$HEADER" \
     --functions \