prefer_expression_function_bodies
Unnecessary use of a block function body.
Description
#The analyzer produces this diagnostic when the body of a function consists of a single return statement with an expression.
Example
#The following code produces this diagnostic because the body of f
has a single return statement:
dart
int f() {
return 0;
}
Common fixes
#If the body is complete, then replace the body with an expression body:
dart
int f() => 0;
If the body isn't complete, then add the missing statements.
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.