38 lines
1.1 KiB
Rust
38 lines
1.1 KiB
Rust
use rustc_hir as hir;
|
|
use rustc_hir::def_id::LocalDefId;
|
|
use rustc_hir::itemlikevisit::ItemLikeVisitor;
|
|
use rustc_middle::ty::query::Providers;
|
|
use rustc_middle::ty::TyCtxt;
|
|
use rustc_span::symbol::sym;
|
|
|
|
fn proc_macro_decls_static(tcx: TyCtxt<'_>, (): ()) -> Option<LocalDefId> {
|
|
let mut finder = Finder { tcx, decls: None };
|
|
tcx.hir().visit_all_item_likes(&mut finder);
|
|
|
|
finder.decls.map(|id| tcx.hir().local_def_id(id))
|
|
}
|
|
|
|
struct Finder<'tcx> {
|
|
tcx: TyCtxt<'tcx>,
|
|
decls: Option<hir::HirId>,
|
|
}
|
|
|
|
impl<'v> ItemLikeVisitor<'v> for Finder<'_> {
|
|
fn visit_item(&mut self, item: &hir::Item<'_>) {
|
|
let attrs = self.tcx.hir().attrs(item.hir_id());
|
|
if self.tcx.sess.contains_name(attrs, sym::rustc_proc_macro_decls) {
|
|
self.decls = Some(item.hir_id());
|
|
}
|
|
}
|
|
|
|
fn visit_trait_item(&mut self, _trait_item: &hir::TraitItem<'_>) {}
|
|
|
|
fn visit_impl_item(&mut self, _impl_item: &hir::ImplItem<'_>) {}
|
|
|
|
fn visit_foreign_item(&mut self, _foreign_item: &hir::ForeignItem<'_>) {}
|
|
}
|
|
|
|
pub(crate) fn provide(providers: &mut Providers) {
|
|
*providers = Providers { proc_macro_decls_static, ..*providers };
|
|
}
|