type_alias_cannot_reference_itself

Typedefs can't reference themselves directly or recursively via another typedef.

The analyzer produces this diagnostic when a typedef refers to itself, either directly or indirectly.

The following code produces this diagnostic because F depends on itself indirectly through G:

typedef F = void Function(G);
typedef G = void Function(F);

Change one or more of the typedefs in the cycle so that none of them refer to themselves:

typedef F = void Function(G);
typedef G = void Function(int);

Unless stated otherwise, the documentation on this site reflects Dart 3.8.0. Page last updated on 2025-05-08. View source or report an issue.