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rustdoc: reduce allocations in visibility_to_src_with_space

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This commit is contained in:
Michael Howell 2023-03-17 15:29:47 -07:00
parent 13afbdaa06
commit 8628e27da3
1 changed files with 7 additions and 7 deletions
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14
src/librustdoc/html/format.rs
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@ -1502,9 +1502,9 @@ pub(crate) fn visibility_to_src_with_space<'a, 'tcx: 'a>(
tcx: TyCtxt<'tcx>,
item_did: DefId,
) -> impl fmt::Display + 'a + Captures<'tcx> {
let to_print = match visibility {
None => String::new(),
Some(ty::Visibility::Public) => "pub ".to_owned(),
let to_print: Cow<'static, str> = match visibility {
None => "".into(),
Some(ty::Visibility::Public) => "pub ".into(),
Some(ty::Visibility::Restricted(vis_did)) => {
// FIXME(camelid): This may not work correctly if `item_did` is a module.
// However, rustdoc currently never displays a module's
@ -1512,17 +1512,17 @@ pub(crate) fn visibility_to_src_with_space<'a, 'tcx: 'a>(
let parent_module = find_nearest_parent_module(tcx, item_did);
if vis_did.is_crate_root() {
"pub(crate) ".to_owned()
"pub(crate) ".into()
} else if parent_module == Some(vis_did) {
// `pub(in foo)` where `foo` is the parent module
// is the same as no visibility modifier
String::new()
"".into()
} else if parent_module.and_then(|parent| find_nearest_parent_module(tcx, parent))
== Some(vis_did)
{
"pub(super) ".to_owned()
"pub(super) ".into()
} else {
format!("pub(in {}) ", tcx.def_path_str(vis_did))
format!("pub(in {}) ", tcx.def_path_str(vis_did)).into()
}
}
};