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rustc_hir: use box patterns to flatten some nested pattern matches

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This commit is contained in:
Yotam Ofek 2025-01-28 22:22:26 +00:00
parent 0baa100710
commit 3802225884
2 changed files with 10 additions and 24 deletions
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29
compiler/rustc_hir/src/hir.rs
View file

@ -1061,10 +1061,7 @@ impl Attribute {
pub fn value_lit(&self) -> Option<&MetaItemLit> {
match &self.kind {
AttrKind::Normal(n) => match n.as_ref() {
AttrItem { args: AttrArgs::Eq { expr, .. }, .. } => Some(expr),
_ => None,
},
AttrKind::Normal(box AttrItem { args: AttrArgs::Eq { expr, .. }, .. }) => Some(expr),
_ => None,
}
}
@ -1077,13 +1074,10 @@ impl AttributeExt for Attribute {
fn meta_item_list(&self) -> Option<ThinVec<ast::MetaItemInner>> {
match &self.kind {
AttrKind::Normal(n) => match n.as_ref() {
AttrItem { args: AttrArgs::Delimited(d), .. } => {
AttrKind::Normal(box AttrItem { args: AttrArgs::Delimited(d), .. }) => {
ast::MetaItemKind::list_from_tokens(d.tokens.clone())
}
_ => None,
},
_ => None,
}
}
@ -1098,14 +1092,10 @@ impl AttributeExt for Attribute {
/// For a single-segment attribute, returns its name; otherwise, returns `None`.
fn ident(&self) -> Option<Ident> {
match &self.kind {
AttrKind::Normal(n) => {
if let [ident] = n.path.segments.as_ref() {
Some(*ident)
} else {
None
}
}
AttrKind::DocComment(..) => None,
AttrKind::Normal(box AttrItem {
path: AttrPath { segments: box [ident], .. }, ..
}) => Some(*ident),
_ => None,
}
}
@ -1128,12 +1118,7 @@ impl AttributeExt for Attribute {
}
fn is_word(&self) -> bool {
match &self.kind {
AttrKind::Normal(n) => {
matches!(n.args, AttrArgs::Empty)
}
AttrKind::DocComment(..) => false,
}
matches!(self.kind, AttrKind::Normal(box AttrItem { args: AttrArgs::Empty, .. }))
}
fn ident_path(&self) -> Option<SmallVec<[Ident; 1]>> {

1
compiler/rustc_hir/src/lib.rs
View file

@ -5,6 +5,7 @@
// tidy-alphabetical-start
#![allow(internal_features)]
#![feature(associated_type_defaults)]
#![feature(box_patterns)]
#![feature(closure_track_caller)]
#![feature(debug_closure_helpers)]
#![feature(exhaustive_patterns)]