rustc: Tweak expansion of #[proc_macro] for 2018 #52326
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r? @aturon (rust_highfive has picked a reviewer for you, use r? to override) |
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r? @nrc cc @petrochenkov (not directly related to macros 1.2, but you probably want to be aware of this) |
| @@ -385,9 +389,21 @@ fn mk_registrar(cx: &mut ExtCtxt, | |||
| let register_custom_derive = Ident::from_str("register_custom_derive"); | |||
| let register_attr_proc_macro = Ident::from_str("register_attr_proc_macro"); | |||
| let register_bang_proc_macro = Ident::from_str("register_bang_proc_macro"); | |||
| let crate_kw = Ident::with_empty_ctxt(keywords::Crate.name()); | |||
| let use_crate_kw = match cx.ecfg.features { | |||
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Can't we always generate crate::proc_macro_fn regardless of editions and enabled features?
The whole registrar code is under allow_internal_unstable: true span anyway.
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I thought so! I originally did that but it generated feature errors :(
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That's because the path spans are set to cd.span/ca.span/cm.span and not span.
You can use cd.span.with_ctxt(span.ctxt()) to keep the sane locations, but apply stability hygiene.
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Worked like a charm!
The syntactical expansion of `#[proc_macro]` and related attributes currently contains absolute paths which conflicts with a lint for the 2018 edition, causing issues like rust-lang#52214. This commit puts a band-aid on the issue by ensuring that procedural macros can also migrate to the 2018 edition for now by tweaking the expansion based on what features are activated. A more long-term solution would probably tweak the edition hygiene of spans, but this should do the trick for now. Closes rust-lang#52214
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@bors r+ |
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📌 Commit 94c9ea4 has been approved by |
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⌛ Testing commit 94c9ea4 with merge 6241dcf5557f9f4d7481205581d4500d11e29230... |
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💔 Test failed - status-appveyor |
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…henkov rustc: Tweak expansion of #[proc_macro] for 2018 The syntactical expansion of `#[proc_macro]` and related attributes currently contains absolute paths which conflicts with a lint for the 2018 edition, causing issues like #52214. This commit puts a band-aid on the issue by ensuring that procedural macros can also migrate to the 2018 edition for now by tweaking the expansion based on what features are activated. A more long-term solution would probably tweak the edition hygiene of spans, but this should do the trick for now. Closes #52214
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⌛ Testing commit 94c9ea4 with merge 253a01c41e1a51b368699199a158bb9eb4dd70c6... |
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…henkov rustc: Tweak expansion of #[proc_macro] for 2018 The syntactical expansion of `#[proc_macro]` and related attributes currently contains absolute paths which conflicts with a lint for the 2018 edition, causing issues like #52214. This commit puts a band-aid on the issue by ensuring that procedural macros can also migrate to the 2018 edition for now by tweaking the expansion based on what features are activated. A more long-term solution would probably tweak the edition hygiene of spans, but this should do the trick for now. Closes #52214
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The syntactical expansion of
#[proc_macro]and related attributes currentlycontains absolute paths which conflicts with a lint for the 2018 edition,
causing issues like #52214. This commit puts a band-aid on the issue by ensuring
that procedural macros can also migrate to the 2018 edition for now by tweaking
the expansion based on what features are activated. A more long-term solution
would probably tweak the edition hygiene of spans, but this should do the trick
for now.
Closes #52214