rustdoc: Create an attribute version of --extern-html-root-url
#96533
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This is a potential first step for a change of behaviour for
--html-root-url
. Currently, unless you use--extern-html-root-takes-precedence
, if you have set--html-root-url
, it'll always skip the content of--extern-html-root-url
. I'd prefer if it did that only in case there is no entry for this crate, which would make more sense I think.Anyway, this PR is "only" about allowing to write:
#![doc(extern_html_root_url(std = "https://doc.rust-lang.org/nightly"))]
I felt the need for it because of #96519.
So what do you think?
cc @rust-lang/rustdoc
r? rust-lang/rustdoc