[Dot Shorthands] `prefer_const_constructors`

[RohitSaily]

Dart SDK version: 3.9.0-252.0.dev (dev) (Thu Jun 19 05:08:58 2025 -0700) on "macos_x64"

Analyzer via VSCode with lint rule prefer_const_constructors enabled

class A
{	A():
		cannotBeConst=0;
	int cannotBeConst;
}
extension type const B(A a)
	{}
B get b=>
	.new(A()); // Nonexpected error `prefer_const_constructors` :(

The lint rule prefer_const_constructors should not be triggered here because const cannot be used in this case. This is only an issue when the dot shorthand .new is used

B get b=>
	B(A()); // no dot-shorthand, no error :)

[FMorschel]

@kallentu do you want me to look into this?

[keertip]

//cc @kallentu

[kallentu]

[@kallentu](https://github.com/kallentu) do you want me to look into this?

Ooh, no worries, I got it. Was just working on this last week.

Looking now.