record_literal_one_positional_no_trailing_comma

A record literal with exactly one positional field requires a trailing comma.

The analyzer produces this diagnostic when a record literal with a single positional field doesn't have a trailing comma after the field.

In some locations a record literal with a single positional field could also be a parenthesized expression. A trailing comma is required to disambiguate these two valid interpretations.

The following code produces this diagnostic because the record literal has one positional field but doesn't have a trailing comma:

var r = const (1);

Add a trailing comma:

var r = const (1,);

Unless stated otherwise, the documentation on this site reflects Dart 3.8.1. Page last updated on 2025-05-08. View source or report an issue.