built_in_identifier_as_type

The built-in identifier '{0}' can't be used as a type.

The analyzer produces this diagnostic when a built-in identifier is used where a type name is expected.

The following code produces this diagnostic because import can't be used as a type because it's a built-in identifier:

import<int> x;

Replace the built-in identifier with the name of a valid type:

List<int> x;

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.