Closed
Description
Output of cargo clippy -V: clippy 0.0.212 (3aea8603 2019-09-03)
Given the following code:
trait Foo {
fn bar(self: Box<Self>) -> u32 {
5
}
}Clippy lint boxed local is triggered, advising us to remove the Box and have plain self in the argument list, like this:
trait Foo {
fn bar(self) -> u32 {
5
}
}However, doing this makes the code fail compilation with the following error:
the size for values of type "Self" cannot be known at compilation time,
which is always the case for traits.
I've encountered this while implementing the state design pattern with dynamic dispatch. I wouldn't usually opt for dynamic dispatch, however the problem domain requires it.
Ideally this lint should check weather the implementation is a default trait method implementation before triggering.