Permit unsized Write in format_document?

[ArtemGr]

Right now sxd_document::writer::format_document requires a Sized writer.
Using it with &mut Write produces a error:

src/crates/by_ad/../../by_ad.rs:901:3: 901:40 error: the trait `core::marker::Sized` is not implemented for the type `std::io::Write`
src/crates/by_ad/../../by_ad.rs:901   sxd_document::writer::format_document (&doc, out);
                                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/crates/by_ad/../../by_ad.rs:901:3: 901:40 `std::io::Write` does not have a constant size known at compile-time
src/crates/by_ad/../../by_ad.rs:901   sxd_document::writer::format_document (&doc, out);

(The code is along these lines:)

pub fn foo (out: &mut Write) {
    // ...
    sxd_document::writer::format_document (&doc, out);
}

Could you make the W unsized (?Sized)?

[shepmaster]

Can you give the unsized branch a shot, to see if it works with your case?

[ArtemGr]

Yes, the branch works NP, thanks!