invocation_of_non_function_expression
The expression doesn't evaluate to a function, so it can't be invoked.
Description
#The analyzer produces this diagnostic when a function invocation is found, but the name being referenced isn't the name of a function, or when the expression computing the function doesn't compute a function.
Examples
#The following code produces this diagnostic because x
isn't a function:
int x = 0;
int f() => x;
var y = x();
The following code produces this diagnostic because f()
doesn't return a function:
int x = 0;
int f() => x;
var y = f()();
Common fixes
#If you need to invoke a function, then replace the code before the argument list with the name of a function or with an expression that computes a function:
int x = 0;
int f() => x;
var y = f();
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.