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Deduplicate macro_rules! from module_exports when documenting them

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This can append if within the same module a `#[macro_export] macro_rules!`
is declared but also a reexport of itself producing two export of the same
macro in the same module. In that case we only want to document it once.
This commit is contained in:
Loïc BRANSTETT 2021-10-14 01:50:37 +02:00
parent eeb16a2a89
commit 15c876db9c
1 changed files with 11 additions and 3 deletions
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14
src/librustdoc/visit_ast.rs
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@ -87,13 +87,21 @@ impl<'a, 'tcx> RustdocVisitor<'a, 'tcx> {
// the rexport defines the path that a user will actually see. Accordingly,
// we add the rexport as an item here, and then skip over the original
// definition in `visit_item()` below.
//
// We also skip `#[macro_export] macro_rules!` that have alredy been inserted,
// this can append if within the same module a `#[macro_export] macro_rules!`
// is declared but also a reexport of itself producing two export of the same
// macro in the same module.
let mut inserted = FxHashSet::default();
for export in self.cx.tcx.module_exports(CRATE_DEF_ID).unwrap_or(&[]) {
if let Res::Def(DefKind::Macro(_), def_id) = export.res {
if let Some(local_def_id) = def_id.as_local() {
if self.cx.tcx.has_attr(def_id, sym::macro_export) {
let hir_id = self.cx.tcx.hir().local_def_id_to_hir_id(local_def_id);
let item = self.cx.tcx.hir().expect_item(hir_id);
top_level_module.items.push((item, None));
if !inserted.insert(def_id) {
let hir_id = self.cx.tcx.hir().local_def_id_to_hir_id(local_def_id);
let item = self.cx.tcx.hir().expect_item(hir_id);
top_level_module.items.push((item, None));
}
}
}
}