main_ has_ required_ named_ parameters
The function 'main' can't have any required named parameters.
Description
#
The analyzer produces this diagnostic when a function named
main
has one
or more required named parameters.
Example
#
The following code produces this diagnostic because the function named
main
has a required named parameter (x
):
void main({required int x}) {}
Common fixes
#If the function is an entry point, then remove the required
keyword:
void main({int? x}) {}
If the function isn't an entry point, then change the name of the function:
void f({required int x}) {}
Unless stated otherwise, the documentation on this site reflects Dart 3.9.2. Page last updated on 2025-9-1. View source or report an issue.