unnecessary_parenthesis

Unnecessary use of parentheses.

The analyzer produces this diagnostic when parentheses are used where they do not affect the semantics of the code.

The following code produces this diagnostic because the parentheses around the binary expression are not necessary:

int f(int a, int b) => (a + b);

Remove the unnecessary parentheses:

int f(int a, int b) => a + b;

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.