bjoernager/rust
bjoernager/rust
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Remove ref patterns from rustc_ast

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Also use if let chains in one case.
This commit is contained in:
Maybe Waffle 2022-11-16 19:26:38 +00:00
parent 736c675d2a
commit 417ed9fee2
6 changed files with 214 additions and 224 deletions
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90
compiler/rustc_ast/src/attr/mod.rs
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@ -44,16 +44,16 @@ impl MarkedAttrs {
impl NestedMetaItem {
/// Returns the `MetaItem` if `self` is a `NestedMetaItem::MetaItem`.
pub fn meta_item(&self) -> Option<&MetaItem> {
match *self {
NestedMetaItem::MetaItem(ref item) => Some(item),
match self {
NestedMetaItem::MetaItem(item) => Some(item),
_ => None,
}
}
/// Returns the `Lit` if `self` is a `NestedMetaItem::Literal`s.
pub fn literal(&self) -> Option<&Lit> {
match *self {
NestedMetaItem::Literal(ref lit) => Some(lit),
match self {
NestedMetaItem::Literal(lit) => Some(lit),
_ => None,
}
}
@ -116,18 +116,18 @@ impl NestedMetaItem {
impl Attribute {
#[inline]
pub fn has_name(&self, name: Symbol) -> bool {
match self.kind {
AttrKind::Normal(ref normal) => normal.item.path == name,
match &self.kind {
AttrKind::Normal(normal) => normal.item.path == name,
AttrKind::DocComment(..) => false,
}
}
/// For a single-segment attribute, returns its name; otherwise, returns `None`.
pub fn ident(&self) -> Option<Ident> {
match self.kind {
AttrKind::Normal(ref normal) => {
if normal.item.path.segments.len() == 1 {
Some(normal.item.path.segments[0].ident)
match &self.kind {
AttrKind::Normal(normal) => {
if let [ident] = &*normal.item.path.segments {
Some(ident.ident)
} else {
None
}
@ -140,17 +140,15 @@ impl Attribute {
}
pub fn value_str(&self) -> Option<Symbol> {
match self.kind {
AttrKind::Normal(ref normal) => {
normal.item.meta_kind().and_then(|kind| kind.value_str())
}
match &self.kind {
AttrKind::Normal(normal) => normal.item.meta_kind().and_then(|kind| kind.value_str()),
AttrKind::DocComment(..) => None,
}
}
pub fn meta_item_list(&self) -> Option<Vec<NestedMetaItem>> {
match self.kind {
AttrKind::Normal(ref normal) => match normal.item.meta_kind() {
match &self.kind {
AttrKind::Normal(normal) => match normal.item.meta_kind() {
Some(MetaItemKind::List(list)) => Some(list),
_ => None,
},
@ -191,8 +189,8 @@ impl MetaItem {
}
pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
match self.kind {
MetaItemKind::List(ref l) => Some(&l[..]),
match &self.kind {
MetaItemKind::List(l) => Some(&**l),
_ => None,
}
}
@ -268,9 +266,9 @@ impl Attribute {
/// * `#[doc = "doc"]` returns `Some("doc")`.
/// * `#[doc(...)]` returns `None`.
pub fn doc_str(&self) -> Option<Symbol> {
match self.kind {
AttrKind::DocComment(.., data) => Some(data),
AttrKind::Normal(ref normal) if normal.item.path == sym::doc => {
match &self.kind {
AttrKind::DocComment(.., data) => Some(*data),
AttrKind::Normal(normal) if normal.item.path == sym::doc => {
normal.item.meta_kind().and_then(|kind| kind.value_str())
}
_ => None,
@ -282,8 +280,8 @@ impl Attribute {
}
pub fn get_normal_item(&self) -> &AttrItem {
match self.kind {
AttrKind::Normal(ref normal) => &normal.item,
match &self.kind {
AttrKind::Normal(normal) => &normal.item,
AttrKind::DocComment(..) => panic!("unexpected doc comment"),
}
}
@ -297,28 +295,28 @@ impl Attribute {
/// Extracts the MetaItem from inside this Attribute.
pub fn meta(&self) -> Option<MetaItem> {
match self.kind {
AttrKind::Normal(ref normal) => normal.item.meta(self.span),
match &self.kind {
AttrKind::Normal(normal) => normal.item.meta(self.span),
AttrKind::DocComment(..) => None,
}
}
pub fn meta_kind(&self) -> Option<MetaItemKind> {
match self.kind {
AttrKind::Normal(ref normal) => normal.item.meta_kind(),
match &self.kind {
AttrKind::Normal(normal) => normal.item.meta_kind(),
AttrKind::DocComment(..) => None,
}
}
pub fn tokens(&self) -> TokenStream {
match self.kind {
AttrKind::Normal(ref normal) => normal
match &self.kind {
AttrKind::Normal(normal) => normal
.tokens
.as_ref()
.unwrap_or_else(|| panic!("attribute is missing tokens: {:?}", self))
.to_attr_token_stream()
.to_tokenstream(),
AttrKind::DocComment(comment_kind, data) => TokenStream::new(vec![TokenTree::Token(
&AttrKind::DocComment(comment_kind, data) => TokenStream::new(vec![TokenTree::Token(
Token::new(token::DocComment(comment_kind, self.style, data), self.span),
Spacing::Alone,
)]),
@ -496,17 +494,17 @@ impl MetaItem {
let span = span.with_hi(segments.last().unwrap().ident.span.hi());
Path { span, segments, tokens: None }
}
Some(TokenTree::Token(Token { kind: token::Interpolated(nt), .. }, _)) => match *nt {
token::Nonterminal::NtMeta(ref item) => return item.meta(item.path.span),
token::Nonterminal::NtPath(ref path) => (**path).clone(),
Some(TokenTree::Token(Token { kind: token::Interpolated(nt), .. }, _)) => match &*nt {
token::Nonterminal::NtMeta(item) => return item.meta(item.path.span),
token::Nonterminal::NtPath(path) => (**path).clone(),
_ => return None,
},
_ => return None,
};
let list_closing_paren_pos = tokens.peek().map(|tt| tt.span().hi());
let kind = MetaItemKind::from_tokens(tokens)?;
let hi = match kind {
MetaItemKind::NameValue(ref lit) => lit.span.hi(),
let hi = match &kind {
MetaItemKind::NameValue(lit) => lit.span.hi(),
MetaItemKind::List(..) => list_closing_paren_pos.unwrap_or(path.span.hi()),
_ => path.span.hi(),
};
@ -518,8 +516,8 @@ impl MetaItem {
impl MetaItemKind {
pub fn value_str(&self) -> Option<Symbol> {
match self {
MetaItemKind::NameValue(ref v) => match v.kind {
LitKind::Str(ref s, _) => Some(*s),
MetaItemKind::NameValue(v) => match v.kind {
LitKind::Str(s, _) => Some(s),
_ => None,
},
_ => None,
@ -557,15 +555,15 @@ impl MetaItemKind {
}
fn token_trees(&self, span: Span) -> Vec<TokenTree> {
match *self {
match self {
MetaItemKind::Word => vec![],
MetaItemKind::NameValue(ref lit) => {
MetaItemKind::NameValue(lit) => {
vec![
TokenTree::token_alone(token::Eq, span),
TokenTree::Token(lit.to_token(), Spacing::Alone),
]
}
MetaItemKind::List(ref list) => {
MetaItemKind::List(list) => {
let mut tokens = Vec::new();
for (i, item) in list.iter().enumerate() {
if i > 0 {
@ -648,16 +646,16 @@ impl MetaItemKind {
impl NestedMetaItem {
pub fn span(&self) -> Span {
match *self {
NestedMetaItem::MetaItem(ref item) => item.span,
NestedMetaItem::Literal(ref lit) => lit.span,
match self {
NestedMetaItem::MetaItem(item) => item.span,
NestedMetaItem::Literal(lit) => lit.span,
}
}
fn token_trees(&self) -> Vec<TokenTree> {
match *self {
NestedMetaItem::MetaItem(ref item) => item.token_trees(),
NestedMetaItem::Literal(ref lit) => {
match self {
NestedMetaItem::MetaItem(item) => item.token_trees(),
NestedMetaItem::Literal(lit) => {
vec![TokenTree::Token(lit.to_token(), Spacing::Alone)]
}
}