prefer_ is_ not_ operator
Prefer is! operator.
Details
#When checking if an object is not of a specified type, it is preferable to use the 'is!' operator.
BAD:
if (!(foo is Foo)) {
...
}
GOOD:
if (foo is! Foo) {
...
}
Enable
#
To enable the
prefer_is_not_operator
rule, add
prefer_is_not_operator
under
linter > rules
in your
analysis_options.yaml
file:
linter:
rules:
- prefer_is_not_operator
If you're instead using the YAML map syntax to configure linter rules,
add
prefer_is_not_operator: true
under
linter > rules:
linter:
rules:
prefer_is_not_operator: true
Unless stated otherwise, the documentation on this site reflects Dart 3.9.2. Report an issue.