Allow $foo:block nonterminals in expression position #14432
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| INTERPOLATED(token::NtExpr(e)) => { | ||
| Some(e) | ||
| } | ||
| INTERPOLATED(token::NtPath(_)) => { | ||
| let pt = maybe_path.take_unwrap(); | ||
| Some($p.mk_expr(($p).span.lo, ($p).span.hi, ExprPath(pt))) | ||
| let pt = match $p.token { |
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Why can't this be part of the outer match?
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Because mk_expr() takes a &mut pointer (for no valid reason except that all of the methods take &mut), so the outstanding reference from ref pt would trigger a borrowck error.
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Oh, I see. I guess we theoretically want to move the token out of p.token to avoid the borrowing and the clone.
r=me if you add a FIXME referencing this (no particular need for an issue).
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Drop support for non-syroot proc macro ABIs This makes some bigger changes to how we handle the proc-macro-srv things, for one it is now an empty crate if built without the `sysroot-abi` feature, this simplifies some things dropping the need to put the feature cfg in various places. The cli wrapper now actually depends on the server, instead of being part of the server that is just exported, that way we can have a true dummy server that just errors on each request if no sysroot support was specified.
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Fixes #13678.