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rustc_ast: Merge impls and reorder methods for attributes and meta items
This commit is contained in:
Vadim Petrochenkov
parent
8dabf5da9e
commit
37a72a2e3e
@ -40,310 +40,6 @@ impl MarkedAttrs {
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}
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}
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impl NestedMetaItem {
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/// Returns the `MetaItem` if `self` is a `NestedMetaItem::MetaItem`.
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pub fn meta_item(&self) -> Option<&MetaItem> {
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match self {
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NestedMetaItem::MetaItem(item) => Some(item),
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_ => None,
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}
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}
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/// Returns the `MetaItemLit` if `self` is a `NestedMetaItem::Literal`s.
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pub fn lit(&self) -> Option<&MetaItemLit> {
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match self {
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NestedMetaItem::Lit(lit) => Some(lit),
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_ => None,
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}
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}
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/// Returns `true` if this list item is a MetaItem with a name of `name`.
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pub fn has_name(&self, name: Symbol) -> bool {
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self.meta_item().map_or(false, |meta_item| meta_item.has_name(name))
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}
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/// For a single-segment meta item, returns its name; otherwise, returns `None`.
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pub fn ident(&self) -> Option<Ident> {
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self.meta_item().and_then(|meta_item| meta_item.ident())
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}
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pub fn name_or_empty(&self) -> Symbol {
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self.ident().unwrap_or_else(Ident::empty).name
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}
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/// Gets the string value if `self` is a `MetaItem` and the `MetaItem` is a
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/// `MetaItemKind::NameValue` variant containing a string, otherwise `None`.
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pub fn value_str(&self) -> Option<Symbol> {
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self.meta_item().and_then(|meta_item| meta_item.value_str())
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}
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/// Returns a name and single literal value tuple of the `MetaItem`.
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pub fn name_value_literal(&self) -> Option<(Symbol, &MetaItemLit)> {
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self.meta_item().and_then(|meta_item| {
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meta_item.meta_item_list().and_then(|meta_item_list| {
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if meta_item_list.len() == 1
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&& let Some(ident) = meta_item.ident()
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&& let Some(lit) = meta_item_list[0].lit()
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{
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return Some((ident.name, lit));
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}
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None
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})
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})
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}
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/// Gets a list of inner meta items from a list `MetaItem` type.
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pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
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self.meta_item().and_then(|meta_item| meta_item.meta_item_list())
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}
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/// Returns `true` if the variant is `MetaItem`.
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pub fn is_meta_item(&self) -> bool {
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self.meta_item().is_some()
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}
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/// Returns `true` if `self` is a `MetaItem` and the meta item is a word.
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pub fn is_word(&self) -> bool {
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self.meta_item().map_or(false, |meta_item| meta_item.is_word())
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}
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/// See [`MetaItem::name_value_literal_span`].
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pub fn name_value_literal_span(&self) -> Option<Span> {
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self.meta_item()?.name_value_literal_span()
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}
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}
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impl Attribute {
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#[inline]
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pub fn has_name(&self, name: Symbol) -> bool {
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match &self.kind {
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AttrKind::Normal(normal) => normal.item.path == name,
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AttrKind::DocComment(..) => false,
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}
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}
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/// For a single-segment attribute, returns its name; otherwise, returns `None`.
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pub fn ident(&self) -> Option<Ident> {
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match &self.kind {
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AttrKind::Normal(normal) => {
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if let [ident] = &*normal.item.path.segments {
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Some(ident.ident)
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} else {
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None
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}
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}
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AttrKind::DocComment(..) => None,
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}
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}
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pub fn name_or_empty(&self) -> Symbol {
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self.ident().unwrap_or_else(Ident::empty).name
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}
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pub fn value_str(&self) -> Option<Symbol> {
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match &self.kind {
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AttrKind::Normal(normal) => normal.item.value_str(),
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AttrKind::DocComment(..) => None,
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}
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}
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pub fn meta_item_list(&self) -> Option<Vec<NestedMetaItem>> {
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match &self.kind {
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AttrKind::Normal(normal) => normal.item.meta_item_list(),
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AttrKind::DocComment(..) => None,
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}
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}
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pub fn is_word(&self) -> bool {
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if let AttrKind::Normal(normal) = &self.kind {
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matches!(normal.item.args, AttrArgs::Empty)
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} else {
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false
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}
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}
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}
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impl MetaItem {
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/// For a single-segment meta item, returns its name; otherwise, returns `None`.
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pub fn ident(&self) -> Option<Ident> {
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if self.path.segments.len() == 1 { Some(self.path.segments[0].ident) } else { None }
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}
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pub fn name_or_empty(&self) -> Symbol {
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self.ident().unwrap_or_else(Ident::empty).name
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}
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/// ```text
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/// Example:
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/// #[attribute(name = "value")]
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/// ^^^^^^^^^^^^^^
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/// ```
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pub fn name_value_literal(&self) -> Option<&MetaItemLit> {
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match &self.kind {
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MetaItemKind::NameValue(v) => Some(v),
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_ => None,
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}
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}
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pub fn value_str(&self) -> Option<Symbol> {
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self.kind.value_str()
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}
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pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
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match &self.kind {
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MetaItemKind::List(l) => Some(&**l),
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_ => None,
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}
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}
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pub fn is_word(&self) -> bool {
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matches!(self.kind, MetaItemKind::Word)
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}
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pub fn has_name(&self, name: Symbol) -> bool {
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self.path == name
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}
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/// This is used in case you want the value span instead of the whole attribute. Example:
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///
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/// ```text
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/// #[doc(alias = "foo")]
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/// ```
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///
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/// In here, it'll return a span for `"foo"`.
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pub fn name_value_literal_span(&self) -> Option<Span> {
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Some(self.name_value_literal()?.span)
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}
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}
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impl AttrArgsEq {
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fn value_str(&self) -> Option<Symbol> {
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match self {
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AttrArgsEq::Ast(expr) => match expr.kind {
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ExprKind::Lit(token_lit) => {
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LitKind::from_token_lit(token_lit).ok().and_then(|lit| lit.str())
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}
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_ => None,
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},
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AttrArgsEq::Hir(lit) => lit.kind.str(),
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}
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}
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}
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impl AttrItem {
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pub fn span(&self) -> Span {
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self.args.span().map_or(self.path.span, |args_span| self.path.span.to(args_span))
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}
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pub fn meta(&self, span: Span) -> Option<MetaItem> {
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Some(MetaItem { path: self.path.clone(), kind: self.meta_kind()?, span })
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}
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pub fn meta_kind(&self) -> Option<MetaItemKind> {
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MetaItemKind::from_attr_args(&self.args)
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}
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fn meta_item_list(&self) -> Option<Vec<NestedMetaItem>> {
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match &self.args {
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AttrArgs::Delimited(args) if args.delim == MacDelimiter::Parenthesis => {
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MetaItemKind::list_from_tokens(args.tokens.clone())
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}
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AttrArgs::Delimited(_) | AttrArgs::Eq(..) | AttrArgs::Empty => None,
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}
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}
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fn value_str(&self) -> Option<Symbol> {
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match &self.args {
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AttrArgs::Eq(_, args) => args.value_str(),
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AttrArgs::Delimited(_) | AttrArgs::Empty => None,
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}
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}
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}
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impl Attribute {
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/// Returns `true` if it is a sugared doc comment (`///` or `//!` for example).
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/// So `#[doc = "doc"]` (which is a doc comment) and `#[doc(...)]` (which is not
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/// a doc comment) will return `false`.
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pub fn is_doc_comment(&self) -> bool {
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match self.kind {
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AttrKind::Normal(..) => false,
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AttrKind::DocComment(..) => true,
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}
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}
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/// Returns the documentation and its kind if this is a doc comment or a sugared doc comment.
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/// * `///doc` returns `Some(("doc", CommentKind::Line))`.
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/// * `/** doc */` returns `Some(("doc", CommentKind::Block))`.
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/// * `#[doc = "doc"]` returns `Some(("doc", CommentKind::Line))`.
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/// * `#[doc(...)]` returns `None`.
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pub fn doc_str_and_comment_kind(&self) -> Option<(Symbol, CommentKind)> {
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match &self.kind {
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AttrKind::DocComment(kind, data) => Some((*data, *kind)),
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AttrKind::Normal(normal) if normal.item.path == sym::doc => {
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normal.item.value_str().map(|s| (s, CommentKind::Line))
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}
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_ => None,
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}
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}
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/// Returns the documentation if this is a doc comment or a sugared doc comment.
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/// * `///doc` returns `Some("doc")`.
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/// * `#[doc = "doc"]` returns `Some("doc")`.
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/// * `#[doc(...)]` returns `None`.
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pub fn doc_str(&self) -> Option<Symbol> {
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match &self.kind {
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AttrKind::DocComment(.., data) => Some(*data),
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AttrKind::Normal(normal) if normal.item.path == sym::doc => normal.item.value_str(),
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_ => None,
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}
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}
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pub fn may_have_doc_links(&self) -> bool {
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self.doc_str().map_or(false, |s| comments::may_have_doc_links(s.as_str()))
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}
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pub fn get_normal_item(&self) -> &AttrItem {
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match &self.kind {
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AttrKind::Normal(normal) => &normal.item,
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AttrKind::DocComment(..) => panic!("unexpected doc comment"),
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}
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}
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pub fn unwrap_normal_item(self) -> AttrItem {
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match self.kind {
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AttrKind::Normal(normal) => normal.into_inner().item,
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AttrKind::DocComment(..) => panic!("unexpected doc comment"),
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}
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}
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/// Extracts the MetaItem from inside this Attribute.
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pub fn meta(&self) -> Option<MetaItem> {
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match &self.kind {
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AttrKind::Normal(normal) => normal.item.meta(self.span),
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AttrKind::DocComment(..) => None,
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}
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}
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pub fn meta_kind(&self) -> Option<MetaItemKind> {
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match &self.kind {
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AttrKind::Normal(normal) => normal.item.meta_kind(),
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AttrKind::DocComment(..) => None,
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}
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}
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pub fn tokens(&self) -> TokenStream {
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match &self.kind {
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AttrKind::Normal(normal) => normal
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.tokens
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.as_ref()
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.unwrap_or_else(|| panic!("attribute is missing tokens: {self:?}"))
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.to_attr_token_stream()
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.to_tokenstream(),
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&AttrKind::DocComment(comment_kind, data) => TokenStream::new(vec![TokenTree::Token(
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Token::new(token::DocComment(comment_kind, self.style, data), self.span),
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Spacing::Alone,
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)]),
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}
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}
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}
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pub struct AttrIdGenerator(WorkerLocal<Cell<u32>>);
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#[cfg(debug_assertions)]
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@ -381,93 +77,236 @@ impl AttrIdGenerator {
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}
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}
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pub fn mk_attr(
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g: &AttrIdGenerator,
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style: AttrStyle,
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path: Path,
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args: AttrArgs,
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span: Span,
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) -> Attribute {
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mk_attr_from_item(g, AttrItem { path, args, tokens: None }, None, style, span)
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}
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impl Attribute {
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pub fn get_normal_item(&self) -> &AttrItem {
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match &self.kind {
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AttrKind::Normal(normal) => &normal.item,
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AttrKind::DocComment(..) => panic!("unexpected doc comment"),
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}
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}
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pub fn mk_attr_from_item(
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g: &AttrIdGenerator,
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item: AttrItem,
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tokens: Option<LazyAttrTokenStream>,
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style: AttrStyle,
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span: Span,
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) -> Attribute {
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Attribute {
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kind: AttrKind::Normal(P(NormalAttr { item, tokens })),
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id: g.mk_attr_id(),
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style,
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span,
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pub fn unwrap_normal_item(self) -> AttrItem {
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match self.kind {
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AttrKind::Normal(normal) => normal.into_inner().item,
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AttrKind::DocComment(..) => panic!("unexpected doc comment"),
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}
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}
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/// Returns `true` if it is a sugared doc comment (`///` or `//!` for example).
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/// So `#[doc = "doc"]` (which is a doc comment) and `#[doc(...)]` (which is not
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/// a doc comment) will return `false`.
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pub fn is_doc_comment(&self) -> bool {
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match self.kind {
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AttrKind::Normal(..) => false,
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AttrKind::DocComment(..) => true,
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}
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}
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/// For a single-segment attribute, returns its name; otherwise, returns `None`.
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pub fn ident(&self) -> Option<Ident> {
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match &self.kind {
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AttrKind::Normal(normal) => {
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if let [ident] = &*normal.item.path.segments {
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Some(ident.ident)
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} else {
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None
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}
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}
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AttrKind::DocComment(..) => None,
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}
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}
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pub fn name_or_empty(&self) -> Symbol {
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self.ident().unwrap_or_else(Ident::empty).name
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}
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#[inline]
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pub fn has_name(&self, name: Symbol) -> bool {
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match &self.kind {
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AttrKind::Normal(normal) => normal.item.path == name,
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AttrKind::DocComment(..) => false,
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}
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}
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pub fn is_word(&self) -> bool {
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if let AttrKind::Normal(normal) = &self.kind {
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matches!(normal.item.args, AttrArgs::Empty)
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} else {
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false
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}
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}
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pub fn meta_item_list(&self) -> Option<Vec<NestedMetaItem>> {
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match &self.kind {
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AttrKind::Normal(normal) => normal.item.meta_item_list(),
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AttrKind::DocComment(..) => None,
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}
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}
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pub fn value_str(&self) -> Option<Symbol> {
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match &self.kind {
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AttrKind::Normal(normal) => normal.item.value_str(),
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AttrKind::DocComment(..) => None,
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}
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}
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/// Returns the documentation and its kind if this is a doc comment or a sugared doc comment.
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/// * `///doc` returns `Some(("doc", CommentKind::Line))`.
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/// * `/** doc */` returns `Some(("doc", CommentKind::Block))`.
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/// * `#[doc = "doc"]` returns `Some(("doc", CommentKind::Line))`.
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/// * `#[doc(...)]` returns `None`.
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pub fn doc_str_and_comment_kind(&self) -> Option<(Symbol, CommentKind)> {
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match &self.kind {
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AttrKind::DocComment(kind, data) => Some((*data, *kind)),
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AttrKind::Normal(normal) if normal.item.path == sym::doc => {
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normal.item.value_str().map(|s| (s, CommentKind::Line))
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}
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_ => None,
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}
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}
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/// Returns the documentation if this is a doc comment or a sugared doc comment.
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/// * `///doc` returns `Some("doc")`.
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/// * `#[doc = "doc"]` returns `Some("doc")`.
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/// * `#[doc(...)]` returns `None`.
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pub fn doc_str(&self) -> Option<Symbol> {
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match &self.kind {
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AttrKind::DocComment(.., data) => Some(*data),
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AttrKind::Normal(normal) if normal.item.path == sym::doc => normal.item.value_str(),
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_ => None,
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}
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}
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pub fn may_have_doc_links(&self) -> bool {
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self.doc_str().map_or(false, |s| comments::may_have_doc_links(s.as_str()))
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}
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/// Extracts the MetaItem from inside this Attribute.
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pub fn meta(&self) -> Option<MetaItem> {
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match &self.kind {
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AttrKind::Normal(normal) => normal.item.meta(self.span),
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AttrKind::DocComment(..) => None,
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}
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}
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pub fn meta_kind(&self) -> Option<MetaItemKind> {
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match &self.kind {
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AttrKind::Normal(normal) => normal.item.meta_kind(),
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AttrKind::DocComment(..) => None,
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}
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}
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pub fn tokens(&self) -> TokenStream {
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match &self.kind {
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AttrKind::Normal(normal) => normal
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.tokens
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.as_ref()
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.unwrap_or_else(|| panic!("attribute is missing tokens: {self:?}"))
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.to_attr_token_stream()
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.to_tokenstream(),
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&AttrKind::DocComment(comment_kind, data) => TokenStream::new(vec![TokenTree::Token(
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Token::new(token::DocComment(comment_kind, self.style, data), self.span),
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Spacing::Alone,
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)]),
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}
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}
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}
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|
||||
pub fn mk_attr_word(g: &AttrIdGenerator, style: AttrStyle, name: Symbol, span: Span) -> Attribute {
|
||||
let path = Path::from_ident(Ident::new(name, span));
|
||||
let args = AttrArgs::Empty;
|
||||
mk_attr(g, style, path, args, span)
|
||||
impl AttrItem {
|
||||
pub fn span(&self) -> Span {
|
||||
self.args.span().map_or(self.path.span, |args_span| self.path.span.to(args_span))
|
||||
}
|
||||
|
||||
fn meta_item_list(&self) -> Option<Vec<NestedMetaItem>> {
|
||||
match &self.args {
|
||||
AttrArgs::Delimited(args) if args.delim == MacDelimiter::Parenthesis => {
|
||||
MetaItemKind::list_from_tokens(args.tokens.clone())
|
||||
}
|
||||
AttrArgs::Delimited(_) | AttrArgs::Eq(..) | AttrArgs::Empty => None,
|
||||
}
|
||||
}
|
||||
|
||||
fn value_str(&self) -> Option<Symbol> {
|
||||
match &self.args {
|
||||
AttrArgs::Eq(_, args) => args.value_str(),
|
||||
AttrArgs::Delimited(_) | AttrArgs::Empty => None,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn meta(&self, span: Span) -> Option<MetaItem> {
|
||||
Some(MetaItem { path: self.path.clone(), kind: self.meta_kind()?, span })
|
||||
}
|
||||
|
||||
pub fn meta_kind(&self) -> Option<MetaItemKind> {
|
||||
MetaItemKind::from_attr_args(&self.args)
|
||||
}
|
||||
}
|
||||
|
||||
pub fn mk_attr_name_value_str(
|
||||
g: &AttrIdGenerator,
|
||||
style: AttrStyle,
|
||||
name: Symbol,
|
||||
val: Symbol,
|
||||
span: Span,
|
||||
) -> Attribute {
|
||||
let lit = token::Lit::new(token::Str, escape_string_symbol(val), None);
|
||||
let expr = P(Expr {
|
||||
id: DUMMY_NODE_ID,
|
||||
kind: ExprKind::Lit(lit),
|
||||
span,
|
||||
attrs: AttrVec::new(),
|
||||
tokens: None,
|
||||
});
|
||||
let path = Path::from_ident(Ident::new(name, span));
|
||||
let args = AttrArgs::Eq(span, AttrArgsEq::Ast(expr));
|
||||
mk_attr(g, style, path, args, span)
|
||||
}
|
||||
|
||||
pub fn mk_attr_nested_word(
|
||||
g: &AttrIdGenerator,
|
||||
style: AttrStyle,
|
||||
outer: Symbol,
|
||||
inner: Symbol,
|
||||
span: Span,
|
||||
) -> Attribute {
|
||||
let inner_tokens = TokenStream::new(vec![TokenTree::Token(
|
||||
Token::from_ast_ident(Ident::new(inner, span)),
|
||||
Spacing::Alone,
|
||||
)]);
|
||||
let outer_ident = Ident::new(outer, span);
|
||||
let path = Path::from_ident(outer_ident);
|
||||
let attr_args = AttrArgs::Delimited(DelimArgs {
|
||||
dspan: DelimSpan::from_single(span),
|
||||
delim: MacDelimiter::Parenthesis,
|
||||
tokens: inner_tokens,
|
||||
});
|
||||
mk_attr(g, style, path, attr_args, span)
|
||||
}
|
||||
|
||||
pub fn mk_doc_comment(
|
||||
g: &AttrIdGenerator,
|
||||
comment_kind: CommentKind,
|
||||
style: AttrStyle,
|
||||
data: Symbol,
|
||||
span: Span,
|
||||
) -> Attribute {
|
||||
Attribute { kind: AttrKind::DocComment(comment_kind, data), id: g.mk_attr_id(), style, span }
|
||||
}
|
||||
|
||||
pub fn list_contains_name(items: &[NestedMetaItem], name: Symbol) -> bool {
|
||||
items.iter().any(|item| item.has_name(name))
|
||||
impl AttrArgsEq {
|
||||
fn value_str(&self) -> Option<Symbol> {
|
||||
match self {
|
||||
AttrArgsEq::Ast(expr) => match expr.kind {
|
||||
ExprKind::Lit(token_lit) => {
|
||||
LitKind::from_token_lit(token_lit).ok().and_then(|lit| lit.str())
|
||||
}
|
||||
_ => None,
|
||||
},
|
||||
AttrArgsEq::Hir(lit) => lit.kind.str(),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl MetaItem {
|
||||
/// For a single-segment meta item, returns its name; otherwise, returns `None`.
|
||||
pub fn ident(&self) -> Option<Ident> {
|
||||
if self.path.segments.len() == 1 { Some(self.path.segments[0].ident) } else { None }
|
||||
}
|
||||
|
||||
pub fn name_or_empty(&self) -> Symbol {
|
||||
self.ident().unwrap_or_else(Ident::empty).name
|
||||
}
|
||||
|
||||
pub fn has_name(&self, name: Symbol) -> bool {
|
||||
self.path == name
|
||||
}
|
||||
|
||||
pub fn is_word(&self) -> bool {
|
||||
matches!(self.kind, MetaItemKind::Word)
|
||||
}
|
||||
|
||||
pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
|
||||
match &self.kind {
|
||||
MetaItemKind::List(l) => Some(&**l),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
|
||||
/// ```text
|
||||
/// Example:
|
||||
/// #[attribute(name = "value")]
|
||||
/// ^^^^^^^^^^^^^^
|
||||
/// ```
|
||||
pub fn name_value_literal(&self) -> Option<&MetaItemLit> {
|
||||
match &self.kind {
|
||||
MetaItemKind::NameValue(v) => Some(v),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
|
||||
/// This is used in case you want the value span instead of the whole attribute. Example:
|
||||
///
|
||||
/// ```text
|
||||
/// #[doc(alias = "foo")]
|
||||
/// ```
|
||||
///
|
||||
/// In here, it'll return a span for `"foo"`.
|
||||
pub fn name_value_literal_span(&self) -> Option<Span> {
|
||||
Some(self.name_value_literal()?.span)
|
||||
}
|
||||
|
||||
pub fn value_str(&self) -> Option<Symbol> {
|
||||
self.kind.value_str()
|
||||
}
|
||||
|
||||
fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<MetaItem>
|
||||
where
|
||||
I: Iterator<Item = TokenTree>,
|
||||
@ -564,6 +403,24 @@ impl MetaItemKind {
|
||||
}
|
||||
}
|
||||
|
||||
fn from_tokens(
|
||||
tokens: &mut iter::Peekable<impl Iterator<Item = TokenTree>>,
|
||||
) -> Option<MetaItemKind> {
|
||||
match tokens.peek() {
|
||||
Some(TokenTree::Delimited(_, Delimiter::Parenthesis, inner_tokens)) => {
|
||||
let inner_tokens = inner_tokens.clone();
|
||||
tokens.next();
|
||||
MetaItemKind::list_from_tokens(inner_tokens).map(MetaItemKind::List)
|
||||
}
|
||||
Some(TokenTree::Delimited(..)) => None,
|
||||
Some(TokenTree::Token(Token { kind: token::Eq, .. }, _)) => {
|
||||
tokens.next();
|
||||
MetaItemKind::name_value_from_tokens(tokens)
|
||||
}
|
||||
_ => Some(MetaItemKind::Word),
|
||||
}
|
||||
}
|
||||
|
||||
fn from_attr_args(args: &AttrArgs) -> Option<MetaItemKind> {
|
||||
match args {
|
||||
AttrArgs::Empty => Some(MetaItemKind::Word),
|
||||
@ -585,24 +442,6 @@ impl MetaItemKind {
|
||||
AttrArgs::Eq(_, AttrArgsEq::Hir(lit)) => Some(MetaItemKind::NameValue(lit.clone())),
|
||||
}
|
||||
}
|
||||
|
||||
fn from_tokens(
|
||||
tokens: &mut iter::Peekable<impl Iterator<Item = TokenTree>>,
|
||||
) -> Option<MetaItemKind> {
|
||||
match tokens.peek() {
|
||||
Some(TokenTree::Delimited(_, Delimiter::Parenthesis, inner_tokens)) => {
|
||||
let inner_tokens = inner_tokens.clone();
|
||||
tokens.next();
|
||||
MetaItemKind::list_from_tokens(inner_tokens).map(MetaItemKind::List)
|
||||
}
|
||||
Some(TokenTree::Delimited(..)) => None,
|
||||
Some(TokenTree::Token(Token { kind: token::Eq, .. }, _)) => {
|
||||
tokens.next();
|
||||
MetaItemKind::name_value_from_tokens(tokens)
|
||||
}
|
||||
_ => Some(MetaItemKind::Word),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl NestedMetaItem {
|
||||
@ -613,6 +452,77 @@ impl NestedMetaItem {
|
||||
}
|
||||
}
|
||||
|
||||
/// For a single-segment meta item, returns its name; otherwise, returns `None`.
|
||||
pub fn ident(&self) -> Option<Ident> {
|
||||
self.meta_item().and_then(|meta_item| meta_item.ident())
|
||||
}
|
||||
|
||||
pub fn name_or_empty(&self) -> Symbol {
|
||||
self.ident().unwrap_or_else(Ident::empty).name
|
||||
}
|
||||
|
||||
/// Returns `true` if this list item is a MetaItem with a name of `name`.
|
||||
pub fn has_name(&self, name: Symbol) -> bool {
|
||||
self.meta_item().map_or(false, |meta_item| meta_item.has_name(name))
|
||||
}
|
||||
|
||||
/// Returns `true` if `self` is a `MetaItem` and the meta item is a word.
|
||||
pub fn is_word(&self) -> bool {
|
||||
self.meta_item().map_or(false, |meta_item| meta_item.is_word())
|
||||
}
|
||||
|
||||
/// Gets a list of inner meta items from a list `MetaItem` type.
|
||||
pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
|
||||
self.meta_item().and_then(|meta_item| meta_item.meta_item_list())
|
||||
}
|
||||
|
||||
/// Returns a name and single literal value tuple of the `MetaItem`.
|
||||
pub fn name_value_literal(&self) -> Option<(Symbol, &MetaItemLit)> {
|
||||
self.meta_item().and_then(|meta_item| {
|
||||
meta_item.meta_item_list().and_then(|meta_item_list| {
|
||||
if meta_item_list.len() == 1
|
||||
&& let Some(ident) = meta_item.ident()
|
||||
&& let Some(lit) = meta_item_list[0].lit()
|
||||
{
|
||||
return Some((ident.name, lit));
|
||||
}
|
||||
None
|
||||
})
|
||||
})
|
||||
}
|
||||
|
||||
/// See [`MetaItem::name_value_literal_span`].
|
||||
pub fn name_value_literal_span(&self) -> Option<Span> {
|
||||
self.meta_item()?.name_value_literal_span()
|
||||
}
|
||||
|
||||
/// Gets the string value if `self` is a `MetaItem` and the `MetaItem` is a
|
||||
/// `MetaItemKind::NameValue` variant containing a string, otherwise `None`.
|
||||
pub fn value_str(&self) -> Option<Symbol> {
|
||||
self.meta_item().and_then(|meta_item| meta_item.value_str())
|
||||
}
|
||||
|
||||
/// Returns the `MetaItemLit` if `self` is a `NestedMetaItem::Literal`s.
|
||||
pub fn lit(&self) -> Option<&MetaItemLit> {
|
||||
match self {
|
||||
NestedMetaItem::Lit(lit) => Some(lit),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
|
||||
/// Returns the `MetaItem` if `self` is a `NestedMetaItem::MetaItem`.
|
||||
pub fn meta_item(&self) -> Option<&MetaItem> {
|
||||
match self {
|
||||
NestedMetaItem::MetaItem(item) => Some(item),
|
||||
_ => None,
|
||||
}
|
||||
}
|
||||
|
||||
/// Returns `true` if the variant is `MetaItem`.
|
||||
pub fn is_meta_item(&self) -> bool {
|
||||
self.meta_item().is_some()
|
||||
}
|
||||
|
||||
fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<NestedMetaItem>
|
||||
where
|
||||
I: Iterator<Item = TokenTree>,
|
||||
@ -634,3 +544,89 @@ impl NestedMetaItem {
|
||||
MetaItem::from_tokens(tokens).map(NestedMetaItem::MetaItem)
|
||||
}
|
||||
}
|
||||
|
||||
pub fn mk_doc_comment(
|
||||
g: &AttrIdGenerator,
|
||||
comment_kind: CommentKind,
|
||||
style: AttrStyle,
|
||||
data: Symbol,
|
||||
span: Span,
|
||||
) -> Attribute {
|
||||
Attribute { kind: AttrKind::DocComment(comment_kind, data), id: g.mk_attr_id(), style, span }
|
||||
}
|
||||
|
||||
pub fn mk_attr(
|
||||
g: &AttrIdGenerator,
|
||||
style: AttrStyle,
|
||||
path: Path,
|
||||
args: AttrArgs,
|
||||
span: Span,
|
||||
) -> Attribute {
|
||||
mk_attr_from_item(g, AttrItem { path, args, tokens: None }, None, style, span)
|
||||
}
|
||||
|
||||
pub fn mk_attr_from_item(
|
||||
g: &AttrIdGenerator,
|
||||
item: AttrItem,
|
||||
tokens: Option<LazyAttrTokenStream>,
|
||||
style: AttrStyle,
|
||||
span: Span,
|
||||
) -> Attribute {
|
||||
Attribute {
|
||||
kind: AttrKind::Normal(P(NormalAttr { item, tokens })),
|
||||
id: g.mk_attr_id(),
|
||||
style,
|
||||
span,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn mk_attr_word(g: &AttrIdGenerator, style: AttrStyle, name: Symbol, span: Span) -> Attribute {
|
||||
let path = Path::from_ident(Ident::new(name, span));
|
||||
let args = AttrArgs::Empty;
|
||||
mk_attr(g, style, path, args, span)
|
||||
}
|
||||
|
||||
pub fn mk_attr_nested_word(
|
||||
g: &AttrIdGenerator,
|
||||
style: AttrStyle,
|
||||
outer: Symbol,
|
||||
inner: Symbol,
|
||||
span: Span,
|
||||
) -> Attribute {
|
||||
let inner_tokens = TokenStream::new(vec![TokenTree::Token(
|
||||
Token::from_ast_ident(Ident::new(inner, span)),
|
||||
Spacing::Alone,
|
||||
)]);
|
||||
let outer_ident = Ident::new(outer, span);
|
||||
let path = Path::from_ident(outer_ident);
|
||||
let attr_args = AttrArgs::Delimited(DelimArgs {
|
||||
dspan: DelimSpan::from_single(span),
|
||||
delim: MacDelimiter::Parenthesis,
|
||||
tokens: inner_tokens,
|
||||
});
|
||||
mk_attr(g, style, path, attr_args, span)
|
||||
}
|
||||
|
||||
pub fn mk_attr_name_value_str(
|
||||
g: &AttrIdGenerator,
|
||||
style: AttrStyle,
|
||||
name: Symbol,
|
||||
val: Symbol,
|
||||
span: Span,
|
||||
) -> Attribute {
|
||||
let lit = token::Lit::new(token::Str, escape_string_symbol(val), None);
|
||||
let expr = P(Expr {
|
||||
id: DUMMY_NODE_ID,
|
||||
kind: ExprKind::Lit(lit),
|
||||
span,
|
||||
attrs: AttrVec::new(),
|
||||
tokens: None,
|
||||
});
|
||||
let path = Path::from_ident(Ident::new(name, span));
|
||||
let args = AttrArgs::Eq(span, AttrArgsEq::Ast(expr));
|
||||
mk_attr(g, style, path, args, span)
|
||||
}
|
||||
|
||||
pub fn list_contains_name(items: &[NestedMetaItem], name: Symbol) -> bool {
|
||||
items.iter().any(|item| item.has_name(name))
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user