Support for anonymous lifetimes

[DGolubets]

This example doesn't work:

struct X<'a>(&'a u32);

#[automock]
trait Foo {
    fn foo(&self) -> X<'_>;
}

`'_` is a reserved lifetime name

If I specify the lifetime explicitly it does.

[asomers]

Hm, while I see your point, I don't think the benefit to this feature is very great, since the workaround is trivial. Is there any method that can't be mocked just by naming the liftetimes? If not, then I'm not going to give this feature much priority.

[DGolubets]

Is there any method that can't be mocked just by naming the liftetimes?

Hopefully not :)

I agree it's not a priority.
Just a little annoying that it makes the code more verbose than required.
But yeah, nothing critical.

[MOZGIII]

async_trait workaround kind of needs this

[asomers]

How so, @MOZGIII ?

[MOZGIII]

#75 (comment)
Here you suggest using 'static, while it really can be just '_ 😄
But that's out of date anyways.

[asomers]

If that's your only concern then I wouldn't say need since you can always specify a named lifetime, just like in https://github.com/asomers/mockall/blob/master/mockall/tests/mock_generic_method_returning_nonstatic.rs .

[MOZGIII]

That would require changing the trait. You can’t always do that, so it’s not a fair solution.

[asomers]

patches welcome.

[asomers]

Ok, I have this working. However, I still don't really understand the need. Can you give an example of a real-world trait with such a method?