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Auto merge of #108221 - petrochenkov:cratecfg, r=michaelwoerister

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rustc_interface: Add a new query `pre_configure`

It partially expands crate attributes before the main expansion pass (without modifying the crate), and the produced preliminary crate attribute list is used for querying a few attributes that are required very early.

Crate-level cfg attributes on the crate itself are then expanded normally during the main expansion pass, like attributes on any other nodes.
This is a continuation of https://github.com/rust-lang/rust/pull/92473 and one more step to very unstable crate-level proc macro attributes maybe actually working.

Previously crate attributes were pre-configured simultaneously with feature extraction, and then written directly into `ast::Crate`.
This commit is contained in:
bors 2023-03-23 15:17:59 +00:00
commit df7fd9995f
20 changed files with 207 additions and 128 deletions
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10
compiler/rustc_lint/src/early.rs
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@ -341,7 +341,7 @@ pub trait EarlyCheckNode<'a>: Copy {
'a: 'b;
}
impl<'a> EarlyCheckNode<'a> for &'a ast::Crate {
impl<'a> EarlyCheckNode<'a> for (&'a ast::Crate, &'a [ast::Attribute]) {
fn id(self) -> ast::NodeId {
ast::CRATE_NODE_ID
}
@ -349,15 +349,15 @@ impl<'a> EarlyCheckNode<'a> for &'a ast::Crate {
where
'a: 'b,
{
&self.attrs
&self.1
}
fn check<'b, T: EarlyLintPass>(self, cx: &mut EarlyContextAndPass<'b, T>)
where
'a: 'b,
{
lint_callback!(cx, check_crate, self);
ast_visit::walk_crate(cx, self);
lint_callback!(cx, check_crate_post, self);
lint_callback!(cx, check_crate, self.0);
ast_visit::walk_crate(cx, self.0);
lint_callback!(cx, check_crate_post, self.0);
}
}