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Show variance of parameters on hover

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This commit is contained in:
Lukas Wirth 2024-12-28 20:31:20 +01:00
parent 60e28c6bd9
commit bb921fbe94
5 changed files with 69 additions and 12 deletions
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9
crates/ide/src/hover/render.rs
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@ -594,12 +594,21 @@ pub(super) fn definition(
_ => None,
};
let variance_info = || match def {
Definition::GenericParam(it) => it.variance(db).as_ref().map(ToString::to_string),
_ => None,
};
let mut extra = String::new();
if hovered_definition {
if let Some(notable_traits) = render_notable_trait(db, notable_traits, edition) {
extra.push_str("\n___\n");
extra.push_str(&notable_traits);
}
if let Some(variance_info) = variance_info() {
extra.push_str("\n___\n");
extra.push_str(&variance_info);
}
if let Some(layout_info) = layout_info() {
extra.push_str("\n___\n");
extra.push_str(&layout_info);