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Rollup merge of #81302 - LeSeulArtichaut:80777-trait-render, r=jyn514

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Fix rendering of stabilization version for trait implementors

Rustdoc compares an item's stabilization version with its parent's to not render it if they are the same. Here, the implementor was compared with itself, resulting in the stabilization version never getting shown.

This probably needs a test.

Fixes #80777.
r? `@jyn514`
This commit is contained in:
Jonas Schievink
2021-01-24 22:10:04 +01:00
committed by GitHub
parent 9089dd2248 20a460e1cf
commit ee4461a996
2 changed files with 40 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
src/librustdoc/html/render/mod.rs
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@@ -2474,7 +2474,7 @@ fn item_function(w: &mut Buffer, cx: &Context<'_>, it: &clean::Item, f: &clean::
fn render_implementor(
cx: &Context<'_>,
implementor: &Impl,
parent: &clean::Item,
trait_: &clean::Item,
w: &mut Buffer,
implementor_dups: &FxHashMap<Symbol, (DefId, bool)>,
aliases: &[String],
@@ -2494,11 +2494,11 @@ fn render_implementor(
w,
cx,
implementor,
parent,
trait_,
AssocItemLink::Anchor(None),
RenderMode::Normal,
implementor.impl_item.stable_since(cx.tcx()).as_deref(),
implementor.impl_item.const_stable_since(cx.tcx()).as_deref(),
trait_.stable_since(cx.tcx()).as_deref(),
trait_.const_stable_since(cx.tcx()).as_deref(),
false,
Some(use_absolute),
false,
@@ -2937,34 +2937,25 @@ fn render_stability_since_raw(
containing_ver: Option<&str>,
containing_const_ver: Option<&str>,
) {
let ver = ver.and_then(|inner| if !inner.is_empty() { Some(inner) } else { None });
let ver = ver.filter(|inner| !inner.is_empty());
let const_ver = const_ver.filter(|inner| !inner.is_empty());
let const_ver = const_ver.and_then(|inner| if !inner.is_empty() { Some(inner) } else { None });
if let Some(v) = ver {
if let Some(cv) = const_ver {
if const_ver != containing_const_ver {
write!(
w,
"<span class=\"since\" title=\"Stable since Rust version {0}, const since {1}\">{0} (const: {1})</span>",
v, cv
);
} else if ver != containing_ver {
write!(
w,
"<span class=\"since\" title=\"Stable since Rust version {0}\">{0}</span>",
v
);
}
} else {
if ver != containing_ver {
write!(
w,
"<span class=\"since\" title=\"Stable since Rust version {0}\">{0}</span>",
v
);
}
match (ver, const_ver) {
(Some(v), Some(cv)) if const_ver != containing_const_ver => {
write!(
w,
"<span class=\"since\" title=\"Stable since Rust version {0}, const since {1}\">{0} (const: {1})</span>",
v, cv
);
}
(Some(v), _) if ver != containing_ver => {
write!(
w,
"<span class=\"since\" title=\"Stable since Rust version {0}\">{0}</span>",
v
);
}
_ => {}
}
}