bjoernager/rust
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Implment #[cfg] and #[cfg_attr] in where clauses

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This commit is contained in:
Frank King 2025-02-05 18:58:29 +08:00
parent 30508faeb3
commit 42f51d4fd4
38 changed files with 3296 additions and 88 deletions
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8
compiler/rustc_resolve/src/build_reduced_graph.rs
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@ -1529,6 +1529,14 @@ impl<'a, 'ra, 'tcx> Visitor<'a> for BuildReducedGraphVisitor<'a, 'ra, 'tcx> {
visit::walk_variant(self, variant);
}
fn visit_where_predicate(&mut self, p: &'a ast::WherePredicate) {
if p.is_placeholder {
self.visit_invoc(p.id);
} else {
visit::walk_where_predicate(self, p);
}
}
fn visit_crate(&mut self, krate: &'a ast::Crate) {
if krate.is_placeholder {
self.visit_invoc_in_module(krate.id);

8
compiler/rustc_resolve/src/def_collector.rs
View file

@ -285,6 +285,14 @@ impl<'a, 'ra, 'tcx> visit::Visitor<'a> for DefCollector<'a, 'ra, 'tcx> {
});
}
fn visit_where_predicate(&mut self, pred: &'a WherePredicate) {
if pred.is_placeholder {
self.visit_macro_invoc(pred.id)
} else {
visit::walk_where_predicate(self, pred)
}
}
fn visit_variant_data(&mut self, data: &'a VariantData) {
// The assumption here is that non-`cfg` macro expansion cannot change field indices.
// It currently holds because only inert attributes are accepted on fields,