prefer_const_constructors
Prefer const
with constant constructors.
Details
#PREFER using const
for instantiating constant constructors.
If a constructor can be invoked as const to produce a canonicalized instance, it's preferable to do so.
BAD:
dart
class A {
const A();
}
void accessA() {
A a = new A();
}
GOOD:
dart
class A {
const A();
}
void accessA() {
A a = const A();
}
GOOD:
dart
class A {
final int x;
const A(this.x);
}
A foo(int x) => new A(x);
Enable
#To enable the prefer_const_constructors
rule,
add prefer_const_constructors
under linter > rules in your
analysis_options.yaml
file:
analysis_options.yaml
yaml
linter:
rules:
- prefer_const_constructors
If you're instead using the YAML map syntax to configure linter rules,
add prefer_const_constructors: true
under linter > rules:
analysis_options.yaml
yaml
linter:
rules:
prefer_const_constructors: true
除非另有说明,文档之所提及适用于 Dart 3.7.2 版本,本页面最后更新时间: 2025-03-07。 查看文档源码 或者 报告页面问题。