invocation_of_non_function
'{0}' isn't a function.
Description
#The analyzer produces this diagnostic when it finds a function invocation, but the name of the function being invoked is defined to be something other than a function.
Example
#The following code produces this diagnostic because Binary
is the name of a function type, not a function:
dart
typedef Binary = int Function(int, int);
int f() {
return Binary(1, 2);
}
Common fixes
#Replace the name with the name of a function.
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.