code: function() {
      const result = this.node("new");
      this.expect(this.tok.T_NEW) && this.next();
      let args = [];
      if (this.token === this.tok.T_CLASS) {
        const what = this.node("class");
        // Annonymous class declaration
        let propExtends = null,
          propImplements = null,
          body = null;
        if (this.next().token === "(") {
          args = this.read_function_argument_list();
        }
        if (this.token == this.tok.T_EXTENDS) {
          propExtends = this.next().read_namespace_name();
        }
        if (this.token == this.tok.T_IMPLEMENTS) {
          propImplements = this.next().read_name_list();
        }
        if (this.expect("{")) {
          body = this.next().read_class_body();
        }
        return result(
          what(null, propExtends, propImplements, body, [0, 0, 0]),
          args
        );
      }
      // Already existing class
      const name = this.read_new_class_name();
      if (this.token === "(") {
        args = this.read_function_argument_list();
      }
      return result(name, args);
    }
docs: ```ebnf
  new_expr ::= T_NEW (namespace_name function_argument_list) | (T_CLASS ... class declaration)
  ```
  https://github.com/php/php-src/blob/master/Zend/zend_language_parser.y#L850