[Feature Request] update syn version in binrw_derive to 2

[Neutron3529]

Currently lots of famous crate, including clap_derive, thiserror_impl uses syn with version 2, updating the version of syn to 2 might save several seconds of compile time.

I'm just wondering whether there exists such plan, since I tried update the syn version, but failed since impl<T> quote::spanned::Spanned for SpannedValue<T> never possible due to the :Sealed limitation.

I have to firstly read the full code and then I can updating the code.

I know how much the work is, thus I'm just wonder.

[csnover]

That trait sealing change is why the version is not updated. There’s no plan to update unless someone else does the work. Getting syn to do what we need it to do sucked (due to a combination of missing specialisation in rustc and the design of syn making it impossible to get access to certain things, though I don’t remember any more what those things are).

[Neutron3529]

Thank you for your reply, feel free to close such issue if it is needed:)
(or keep it open until someone decided to help update the syn version to 2)

[Urist-McGit]

I would also be interested in an update to the syn version 2. I have created a pull request which passes all tests and works for my local project: #299