prefer_collection_literals

Unnecessary constructor invocation.

The analyzer produces this diagnostic when a constructor is used to create a list, map, or set, but a literal would produce the same result.

The following code produces this diagnostic because the constructor for Map is being used to create a map that could also be created using a literal:

var m = Map<String, String>();

Use the literal representation:

var m = <String, String>{};

Unless stated otherwise, the documentation on this site reflects Dart 3.7.3. Page last updated on 2025-05-08. View source or report an issue.