creation_ with_ non_ type
The name '{0}' isn't a class.
Description
#
The analyzer produces this diagnostic when an instance creation using
either
new
or
const
specifies a name that isn't defined as a class.
Example
#
The following code produces this diagnostic because
f
is a function
rather than a class:
int f() => 0;
void g() {
new f();
}
Common fixes
#If a class should be created, then replace the invalid name with the name of a valid class:
int f() => 0;
void g() {
new Object();
}
If the name is the name of a function and you want that function to be
invoked, then remove the
new
or
const
keyword:
int f() => 0;
void g() {
f();
}
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.