prefer_ mixin
Prefer using mixins.
Details
#
Dart 2.1 introduced a new syntax for mixins that provides a safe way for a mixin
to invoke inherited members using
super
. The new style of mixins should always
be used for types that are to be mixed in. As a result, this lint will flag any
uses of a class in a
with
clause.
BAD:
class A {}
class B extends Object with A {}
OK:
mixin M {}
class C with M {}
Enable
#
To enable the
prefer_mixin
rule, add
prefer_mixin
under
linter > rules
in your
analysis_options.yaml
file:
linter:
rules:
- prefer_mixin
If you're instead using the YAML map syntax to configure linter rules,
add
prefer_mixin: true
under
linter > rules:
linter:
rules:
prefer_mixin: true
Unless stated otherwise, the documentation on this site reflects Dart 3.9.2. Report an issue.