Fix test failures seen in php 8.2 (#226)

Fix bug where ZEND_AST_ARROW_FUNC output for 'stmts' in php 8.2 did not match
earlier php versions, which would affect tools using php-ast.

Handle var_export's output changing to always be fully qualified in php 8.2 test
output (`\ast\Node::__set_state(array(` starting with backslash)

And start running tests in php 8.2.

Author: TysonAndre

.github/workflows/main.yml

@@ -33,7 +33,8 @@ jobs:
          - PHP_VERSION: '7.3'
          - PHP_VERSION: '7.4'
          - PHP_VERSION: '8.0'
-         - PHP_VERSION: '8.1.0RC6'
+         - PHP_VERSION: '8.1'
+         - PHP_VERSION: '8.2.0beta2'
 
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:

ast.c

@@ -821,8 +821,18 @@ static void ast_fill_children_ht(HashTable *ht, zend_ast *ast, ast_state_info_t
 		} else {
 			ast_to_zval(&child_zv, child, state);
 		}
-
 		if (child_name) {
+#if PHP_VERSION_ID >= 80200
+			if (ast_kind == ZEND_AST_ARROW_FUNC && i == 2) {
+				/* Imitate the native arrow function ast structure used in php 7.4-8.1 for stmts */
+				/* (This is still different from regular functions, which have AST_STMT_LIST) */
+				/* TODO: In a new node type, remove the ZEND_AST_RETURN node instead. */
+				zval tmp;
+				ast_to_zval(&tmp, child, state);
+				ast_create_virtual_node_ex(
+					&child_zv, ZEND_AST_RETURN, 0, zend_ast_get_lineno(child), state, 1, &tmp);
+			}
+#endif
 			zend_hash_add_new(ht, child_name, &child_zv);
 		} else {
 			zend_hash_next_index_insert(ht, &child_zv);

tests/php82_metadata.phpt

@@ -28,15 +28,15 @@ dump($metadata);
 dump_attributes(ast\Node::class);
 dump_attributes(ast\Metadata::class);
 --EXPECTF--
-ast\Node::__set_state(array(
+%Sast\Node::__set_state(array(
    'kind' => NULL,
    'flags' => NULL,
    'lineno' => NULL,
    'children' => NULL,
    'undeclaredDynamic' => 123,
 ))
 Deprecated: Creation of dynamic property ast\Metadata::$undeclaredDynamic is deprecated in %sphp82_metadata.php on line 21
-ast\Metadata::__set_state(array(
+%Sast\Metadata::__set_state(array(
    'kind' => NULL,
    'name' => NULL,
    'flags' => NULL,