1 //! Functions dealing with attributes and meta items
5 pub use self::builtin::{
6 cfg_matches, contains_feature_attr, eval_condition, find_crate_name, find_deprecation,
7 find_repr_attrs, find_stability, find_unwind_attr, Deprecation, InlineAttr, IntType, ReprAttr,
8 RustcDeprecation, Stability, StabilityLevel, UnwindAttr,
10 pub use self::IntType::*;
11 pub use self::ReprAttr::*;
12 pub use self::StabilityLevel::*;
15 use ast::{AttrId, Attribute, AttrStyle, Name, Ident, Path, PathSegment};
16 use ast::{MetaItem, MetaItemKind, NestedMetaItem, NestedMetaItemKind};
17 use ast::{Lit, LitKind, Expr, ExprKind, Item, Local, Stmt, StmtKind, GenericParam};
18 use source_map::{BytePos, Spanned, respan, dummy_spanned};
19 use syntax_pos::{FileName, Span};
20 use parse::lexer::comments::{doc_comment_style, strip_doc_comment_decoration};
21 use parse::parser::Parser;
22 use parse::{self, ParseSess, PResult};
23 use parse::token::{self, Token};
27 use tokenstream::{TokenStream, TokenTree, DelimSpan};
32 pub fn mark_used(attr: &Attribute) {
33 debug!("Marking {:?} as used.", attr);
34 GLOBALS.with(|globals| {
35 globals.used_attrs.lock().insert(attr.id);
39 pub fn is_used(attr: &Attribute) -> bool {
40 GLOBALS.with(|globals| {
41 globals.used_attrs.lock().contains(attr.id)
45 pub fn mark_known(attr: &Attribute) {
46 debug!("Marking {:?} as known.", attr);
47 GLOBALS.with(|globals| {
48 globals.known_attrs.lock().insert(attr.id);
52 pub fn is_known(attr: &Attribute) -> bool {
53 GLOBALS.with(|globals| {
54 globals.known_attrs.lock().contains(attr.id)
58 pub fn is_known_lint_tool(m_item: Ident) -> bool {
59 ["clippy"].contains(&m_item.as_str().as_ref())
63 /// Returns the MetaItem if self is a NestedMetaItemKind::MetaItem.
64 pub fn meta_item(&self) -> Option<&MetaItem> {
66 NestedMetaItemKind::MetaItem(ref item) => Some(item),
71 /// Returns the Lit if self is a NestedMetaItemKind::Literal.
72 pub fn literal(&self) -> Option<&Lit> {
74 NestedMetaItemKind::Literal(ref lit) => Some(lit),
79 /// Returns the Span for `self`.
80 pub fn span(&self) -> Span {
84 /// Returns true if this list item is a MetaItem with a name of `name`.
85 pub fn check_name(&self, name: &str) -> bool {
86 self.meta_item().map_or(false, |meta_item| meta_item.check_name(name))
89 /// Returns the name of the meta item, e.g., `foo` in `#[foo]`,
90 /// `#[foo="bar"]` and `#[foo(bar)]`, if self is a MetaItem
91 pub fn name(&self) -> Option<Name> {
92 self.meta_item().and_then(|meta_item| Some(meta_item.name()))
95 /// Gets the string value if self is a MetaItem and the MetaItem is a
96 /// MetaItemKind::NameValue variant containing a string, otherwise None.
97 pub fn value_str(&self) -> Option<Symbol> {
98 self.meta_item().and_then(|meta_item| meta_item.value_str())
101 /// Returns a name and single literal value tuple of the MetaItem.
102 pub fn name_value_literal(&self) -> Option<(Name, &Lit)> {
103 self.meta_item().and_then(
104 |meta_item| meta_item.meta_item_list().and_then(
106 if meta_item_list.len() == 1 {
107 let nested_item = &meta_item_list[0];
108 if nested_item.is_literal() {
109 Some((meta_item.name(), nested_item.literal().unwrap()))
119 /// Returns a MetaItem if self is a MetaItem with Kind Word.
120 pub fn word(&self) -> Option<&MetaItem> {
121 self.meta_item().and_then(|meta_item| if meta_item.is_word() {
128 /// Gets a list of inner meta items from a list MetaItem type.
129 pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
130 self.meta_item().and_then(|meta_item| meta_item.meta_item_list())
133 /// Returns `true` if the variant is MetaItem.
134 pub fn is_meta_item(&self) -> bool {
135 self.meta_item().is_some()
138 /// Returns `true` if the variant is Literal.
139 pub fn is_literal(&self) -> bool {
140 self.literal().is_some()
143 /// Returns `true` if self is a MetaItem and the meta item is a word.
144 pub fn is_word(&self) -> bool {
145 self.word().is_some()
148 /// Returns `true` if self is a MetaItem and the meta item is a ValueString.
149 pub fn is_value_str(&self) -> bool {
150 self.value_str().is_some()
153 /// Returns `true` if self is a MetaItem and the meta item is a list.
154 pub fn is_meta_item_list(&self) -> bool {
155 self.meta_item_list().is_some()
159 fn name_from_path(path: &Path) -> Name {
160 path.segments.last().expect("empty path in attribute").ident.name
164 pub fn check_name(&self, name: &str) -> bool {
165 let matches = self.path == name;
172 /// Returns the **last** segment of the name of this attribute.
173 /// e.g., `foo` for `#[foo]`, `skip` for `#[rustfmt::skip]`.
174 pub fn name(&self) -> Name {
175 name_from_path(&self.path)
178 pub fn value_str(&self) -> Option<Symbol> {
179 self.meta().and_then(|meta| meta.value_str())
182 pub fn meta_item_list(&self) -> Option<Vec<NestedMetaItem>> {
184 Some(MetaItem { node: MetaItemKind::List(list), .. }) => Some(list),
189 pub fn is_word(&self) -> bool {
190 self.path.segments.len() == 1 && self.tokens.is_empty()
193 pub fn span(&self) -> Span {
197 pub fn is_meta_item_list(&self) -> bool {
198 self.meta_item_list().is_some()
201 /// Indicates if the attribute is a Value String.
202 pub fn is_value_str(&self) -> bool {
203 self.value_str().is_some()
208 pub fn name(&self) -> Name {
209 name_from_path(&self.ident)
212 // #[attribute(name = "value")]
214 pub fn name_value_literal(&self) -> Option<&Lit> {
216 MetaItemKind::NameValue(v) => Some(v),
221 pub fn value_str(&self) -> Option<Symbol> {
223 MetaItemKind::NameValue(ref v) => {
225 LitKind::Str(ref s, _) => Some(*s),
233 pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
235 MetaItemKind::List(ref l) => Some(&l[..]),
240 pub fn is_word(&self) -> bool {
242 MetaItemKind::Word => true,
247 pub fn span(&self) -> Span { self.span }
249 pub fn check_name(&self, name: &str) -> bool {
253 pub fn is_value_str(&self) -> bool {
254 self.value_str().is_some()
257 pub fn is_meta_item_list(&self) -> bool {
258 self.meta_item_list().is_some()
261 pub fn is_scoped(&self) -> Option<Ident> {
262 if self.ident.segments.len() > 1 {
263 Some(self.ident.segments[0].ident)
271 /// Extract the MetaItem from inside this Attribute.
272 pub fn meta(&self) -> Option<MetaItem> {
273 let mut tokens = self.tokens.trees().peekable();
275 ident: self.path.clone(),
276 node: if let Some(node) = MetaItemKind::from_tokens(&mut tokens) {
277 if tokens.peek().is_some() {
288 pub fn parse<'a, T, F>(&self, sess: &'a ParseSess, mut f: F) -> PResult<'a, T>
289 where F: FnMut(&mut Parser<'a>) -> PResult<'a, T>,
291 let mut parser = Parser::new(sess, self.tokens.clone(), None, false, false);
292 let result = f(&mut parser)?;
293 if parser.token != token::Eof {
294 parser.unexpected()?;
299 pub fn parse_list<'a, T, F>(&self, sess: &'a ParseSess, mut f: F) -> PResult<'a, Vec<T>>
300 where F: FnMut(&mut Parser<'a>) -> PResult<'a, T>,
302 if self.tokens.is_empty() {
303 return Ok(Vec::new());
305 self.parse(sess, |parser| {
306 parser.expect(&token::OpenDelim(token::Paren))?;
307 let mut list = Vec::new();
308 while !parser.eat(&token::CloseDelim(token::Paren)) {
309 list.push(f(parser)?);
310 if !parser.eat(&token::Comma) {
311 parser.expect(&token::CloseDelim(token::Paren))?;
319 pub fn parse_meta<'a>(&self, sess: &'a ParseSess) -> PResult<'a, MetaItem> {
321 ident: self.path.clone(),
322 node: self.parse(sess, |parser| parser.parse_meta_item_kind())?,
327 /// Convert self to a normal #[doc="foo"] comment, if it is a
328 /// comment like `///` or `/** */`. (Returns self unchanged for
329 /// non-sugared doc attributes.)
330 pub fn with_desugared_doc<T, F>(&self, f: F) -> T where
331 F: FnOnce(&Attribute) -> T,
333 if self.is_sugared_doc {
334 let comment = self.value_str().unwrap();
335 let meta = mk_name_value_item_str(
336 Ident::from_str("doc"),
337 dummy_spanned(Symbol::intern(&strip_doc_comment_decoration(&comment.as_str()))));
338 let mut attr = if self.style == ast::AttrStyle::Outer {
339 mk_attr_outer(self.span, self.id, meta)
341 mk_attr_inner(self.span, self.id, meta)
343 attr.is_sugared_doc = true;
353 pub fn mk_name_value_item_str(ident: Ident, value: Spanned<Symbol>) -> MetaItem {
354 let value = respan(value.span, LitKind::Str(value.node, ast::StrStyle::Cooked));
355 mk_name_value_item(ident.span.to(value.span), ident, value)
358 pub fn mk_name_value_item(span: Span, ident: Ident, value: ast::Lit) -> MetaItem {
359 MetaItem { ident: Path::from_ident(ident), span, node: MetaItemKind::NameValue(value) }
362 pub fn mk_list_item(span: Span, ident: Ident, items: Vec<NestedMetaItem>) -> MetaItem {
363 MetaItem { ident: Path::from_ident(ident), span, node: MetaItemKind::List(items) }
366 pub fn mk_word_item(ident: Ident) -> MetaItem {
367 MetaItem { ident: Path::from_ident(ident), span: ident.span, node: MetaItemKind::Word }
370 pub fn mk_nested_word_item(ident: Ident) -> NestedMetaItem {
371 respan(ident.span, NestedMetaItemKind::MetaItem(mk_word_item(ident)))
374 pub fn mk_attr_id() -> AttrId {
375 use std::sync::atomic::AtomicUsize;
376 use std::sync::atomic::Ordering;
378 static NEXT_ATTR_ID: AtomicUsize = AtomicUsize::new(0);
380 let id = NEXT_ATTR_ID.fetch_add(1, Ordering::SeqCst);
381 assert!(id != ::std::usize::MAX);
385 /// Returns an inner attribute with the given value.
386 pub fn mk_attr_inner(span: Span, id: AttrId, item: MetaItem) -> Attribute {
387 mk_spanned_attr_inner(span, id, item)
390 /// Returns an inner attribute with the given value and span.
391 pub fn mk_spanned_attr_inner(sp: Span, id: AttrId, item: MetaItem) -> Attribute {
394 style: ast::AttrStyle::Inner,
396 tokens: item.node.tokens(item.span),
397 is_sugared_doc: false,
402 /// Returns an outer attribute with the given value.
403 pub fn mk_attr_outer(span: Span, id: AttrId, item: MetaItem) -> Attribute {
404 mk_spanned_attr_outer(span, id, item)
407 /// Returns an outer attribute with the given value and span.
408 pub fn mk_spanned_attr_outer(sp: Span, id: AttrId, item: MetaItem) -> Attribute {
411 style: ast::AttrStyle::Outer,
413 tokens: item.node.tokens(item.span),
414 is_sugared_doc: false,
419 pub fn mk_sugared_doc_attr(id: AttrId, text: Symbol, span: Span) -> Attribute {
420 let style = doc_comment_style(&text.as_str());
421 let lit = respan(span, LitKind::Str(text, ast::StrStyle::Cooked));
425 path: Path::from_ident(Ident::from_str("doc").with_span_pos(span)),
426 tokens: MetaItemKind::NameValue(lit).tokens(span),
427 is_sugared_doc: true,
432 pub fn list_contains_name(items: &[NestedMetaItem], name: &str) -> bool {
433 items.iter().any(|item| {
434 item.check_name(name)
438 pub fn contains_name(attrs: &[Attribute], name: &str) -> bool {
439 attrs.iter().any(|item| {
440 item.check_name(name)
444 pub fn find_by_name<'a>(attrs: &'a [Attribute], name: &str) -> Option<&'a Attribute> {
445 attrs.iter().find(|attr| attr.check_name(name))
448 pub fn filter_by_name<'a>(attrs: &'a [Attribute], name: &'a str)
449 -> impl Iterator<Item = &'a Attribute> {
450 attrs.iter().filter(move |attr| attr.check_name(name))
453 pub fn first_attr_value_str_by_name(attrs: &[Attribute], name: &str) -> Option<Symbol> {
455 .find(|at| at.check_name(name))
456 .and_then(|at| at.value_str())
460 fn tokens(&self) -> TokenStream {
461 let mut idents = vec![];
462 let mut last_pos = BytePos(0 as u32);
463 for (i, segment) in self.ident.segments.iter().enumerate() {
464 let is_first = i == 0;
466 let mod_sep_span = Span::new(last_pos,
467 segment.ident.span.lo(),
468 segment.ident.span.ctxt());
469 idents.push(TokenTree::Token(mod_sep_span, Token::ModSep).into());
471 idents.push(TokenTree::Token(segment.ident.span,
472 Token::from_ast_ident(segment.ident)).into());
473 last_pos = segment.ident.span.hi();
475 self.node.tokens(self.span).append_to_tree_and_joint_vec(&mut idents);
476 TokenStream::new(idents)
479 fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<MetaItem>
480 where I: Iterator<Item = TokenTree>,
482 // FIXME: Share code with `parse_path`.
483 let ident = match tokens.next() {
484 Some(TokenTree::Token(span, Token::Ident(ident, _))) => {
485 if let Some(TokenTree::Token(_, Token::ModSep)) = tokens.peek() {
486 let mut segments = vec![PathSegment::from_ident(ident.with_span_pos(span))];
489 if let Some(TokenTree::Token(span,
490 Token::Ident(ident, _))) = tokens.next() {
491 segments.push(PathSegment::from_ident(ident.with_span_pos(span)));
495 if let Some(TokenTree::Token(_, Token::ModSep)) = tokens.peek() {
501 let span = span.with_hi(segments.last().unwrap().ident.span.hi());
502 Path { span, segments }
504 Path::from_ident(ident.with_span_pos(span))
507 Some(TokenTree::Token(_, Token::Interpolated(ref nt))) => match nt.0 {
508 token::Nonterminal::NtIdent(ident, _) => Path::from_ident(ident),
509 token::Nonterminal::NtMeta(ref meta) => return Some(meta.clone()),
510 token::Nonterminal::NtPath(ref path) => path.clone(),
515 let list_closing_paren_pos = tokens.peek().map(|tt| tt.span().hi());
516 let node = MetaItemKind::from_tokens(tokens)?;
517 let hi = match node {
518 MetaItemKind::NameValue(ref lit) => lit.span.hi(),
519 MetaItemKind::List(..) => list_closing_paren_pos.unwrap_or(ident.span.hi()),
520 _ => ident.span.hi(),
522 let span = ident.span.with_hi(hi);
523 Some(MetaItem { ident, node, span })
528 pub fn tokens(&self, span: Span) -> TokenStream {
530 MetaItemKind::Word => TokenStream::empty(),
531 MetaItemKind::NameValue(ref lit) => {
532 let mut vec = vec![TokenTree::Token(span, Token::Eq).into()];
533 lit.tokens().append_to_tree_and_joint_vec(&mut vec);
534 TokenStream::new(vec)
536 MetaItemKind::List(ref list) => {
537 let mut tokens = Vec::new();
538 for (i, item) in list.iter().enumerate() {
540 tokens.push(TokenTree::Token(span, Token::Comma).into());
542 item.node.tokens().append_to_tree_and_joint_vec(&mut tokens);
544 TokenTree::Delimited(
545 DelimSpan::from_single(span),
547 TokenStream::new(tokens).into(),
553 fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<MetaItemKind>
554 where I: Iterator<Item = TokenTree>,
556 let delimited = match tokens.peek().cloned() {
557 Some(TokenTree::Token(_, token::Eq)) => {
559 return if let Some(TokenTree::Token(span, token)) = tokens.next() {
560 LitKind::from_token(token)
561 .map(|lit| MetaItemKind::NameValue(Spanned { node: lit, span: span }))
566 Some(TokenTree::Delimited(_, delim, ref tts)) if delim == token::Paren => {
570 _ => return Some(MetaItemKind::Word),
573 let mut tokens = delimited.into_trees().peekable();
574 let mut result = Vec::new();
575 while let Some(..) = tokens.peek() {
576 let item = NestedMetaItemKind::from_tokens(&mut tokens)?;
577 result.push(respan(item.span(), item));
578 match tokens.next() {
579 None | Some(TokenTree::Token(_, Token::Comma)) => {}
583 Some(MetaItemKind::List(result))
587 impl NestedMetaItemKind {
588 fn span(&self) -> Span {
590 NestedMetaItemKind::MetaItem(ref item) => item.span,
591 NestedMetaItemKind::Literal(ref lit) => lit.span,
595 fn tokens(&self) -> TokenStream {
597 NestedMetaItemKind::MetaItem(ref item) => item.tokens(),
598 NestedMetaItemKind::Literal(ref lit) => lit.tokens(),
602 fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<NestedMetaItemKind>
603 where I: Iterator<Item = TokenTree>,
605 if let Some(TokenTree::Token(span, token)) = tokens.peek().cloned() {
606 if let Some(node) = LitKind::from_token(token) {
608 return Some(NestedMetaItemKind::Literal(respan(span, node)));
612 MetaItem::from_tokens(tokens).map(NestedMetaItemKind::MetaItem)
617 crate fn tokens(&self) -> TokenStream {
618 TokenTree::Token(self.span, self.node.token()).into()
623 fn token(&self) -> Token {
627 LitKind::Str(string, ast::StrStyle::Cooked) => {
628 let escaped = string.as_str().escape_default();
629 Token::Literal(token::Lit::Str_(Symbol::intern(&escaped)), None)
631 LitKind::Str(string, ast::StrStyle::Raw(n)) => {
632 Token::Literal(token::Lit::StrRaw(string, n), None)
634 LitKind::ByteStr(ref bytes) => {
635 let string = bytes.iter().cloned().flat_map(ascii::escape_default)
636 .map(Into::<char>::into).collect::<String>();
637 Token::Literal(token::Lit::ByteStr(Symbol::intern(&string)), None)
639 LitKind::Byte(byte) => {
640 let string: String = ascii::escape_default(byte).map(Into::<char>::into).collect();
641 Token::Literal(token::Lit::Byte(Symbol::intern(&string)), None)
643 LitKind::Char(ch) => {
644 let string: String = ch.escape_default().map(Into::<char>::into).collect();
645 Token::Literal(token::Lit::Char(Symbol::intern(&string)), None)
647 LitKind::Int(n, ty) => {
648 let suffix = match ty {
649 ast::LitIntType::Unsigned(ty) => Some(Symbol::intern(ty.ty_to_string())),
650 ast::LitIntType::Signed(ty) => Some(Symbol::intern(ty.ty_to_string())),
651 ast::LitIntType::Unsuffixed => None,
653 Token::Literal(token::Lit::Integer(Symbol::intern(&n.to_string())), suffix)
655 LitKind::Float(symbol, ty) => {
656 Token::Literal(token::Lit::Float(symbol), Some(Symbol::intern(ty.ty_to_string())))
658 LitKind::FloatUnsuffixed(symbol) => Token::Literal(token::Lit::Float(symbol), None),
659 LitKind::Bool(value) => Token::Ident(Ident::with_empty_ctxt(Symbol::intern(if value {
667 fn from_token(token: Token) -> Option<LitKind> {
669 Token::Ident(ident, false) if ident.name == "true" => Some(LitKind::Bool(true)),
670 Token::Ident(ident, false) if ident.name == "false" => Some(LitKind::Bool(false)),
671 Token::Interpolated(ref nt) => match nt.0 {
672 token::NtExpr(ref v) | token::NtLiteral(ref v) => match v.node {
673 ExprKind::Lit(ref lit) => Some(lit.node.clone()),
678 Token::Literal(lit, suf) => {
679 let (suffix_illegal, result) = parse::lit_token(lit, suf, None);
680 if suffix_illegal && suf.is_some() {
690 pub trait HasAttrs: Sized {
691 fn attrs(&self) -> &[ast::Attribute];
692 fn map_attrs<F: FnOnce(Vec<ast::Attribute>) -> Vec<ast::Attribute>>(self, f: F) -> Self;
695 impl<T: HasAttrs> HasAttrs for Spanned<T> {
696 fn attrs(&self) -> &[ast::Attribute] { self.node.attrs() }
697 fn map_attrs<F: FnOnce(Vec<ast::Attribute>) -> Vec<ast::Attribute>>(self, f: F) -> Self {
698 respan(self.span, self.node.map_attrs(f))
702 impl HasAttrs for Vec<Attribute> {
703 fn attrs(&self) -> &[Attribute] {
706 fn map_attrs<F: FnOnce(Vec<Attribute>) -> Vec<Attribute>>(self, f: F) -> Self {
711 impl HasAttrs for ThinVec<Attribute> {
712 fn attrs(&self) -> &[Attribute] {
715 fn map_attrs<F: FnOnce(Vec<Attribute>) -> Vec<Attribute>>(self, f: F) -> Self {
716 f(self.into()).into()
720 impl<T: HasAttrs + 'static> HasAttrs for P<T> {
721 fn attrs(&self) -> &[Attribute] {
724 fn map_attrs<F: FnOnce(Vec<Attribute>) -> Vec<Attribute>>(self, f: F) -> Self {
725 self.map(|t| t.map_attrs(f))
729 impl HasAttrs for StmtKind {
730 fn attrs(&self) -> &[Attribute] {
732 StmtKind::Local(ref local) => local.attrs(),
733 StmtKind::Item(..) => &[],
734 StmtKind::Expr(ref expr) | StmtKind::Semi(ref expr) => expr.attrs(),
735 StmtKind::Mac(ref mac) => {
736 let (_, _, ref attrs) = **mac;
742 fn map_attrs<F: FnOnce(Vec<Attribute>) -> Vec<Attribute>>(self, f: F) -> Self {
744 StmtKind::Local(local) => StmtKind::Local(local.map_attrs(f)),
745 StmtKind::Item(..) => self,
746 StmtKind::Expr(expr) => StmtKind::Expr(expr.map_attrs(f)),
747 StmtKind::Semi(expr) => StmtKind::Semi(expr.map_attrs(f)),
748 StmtKind::Mac(mac) => StmtKind::Mac(mac.map(|(mac, style, attrs)| {
749 (mac, style, attrs.map_attrs(f))
755 impl HasAttrs for Stmt {
756 fn attrs(&self) -> &[ast::Attribute] { self.node.attrs() }
757 fn map_attrs<F: FnOnce(Vec<ast::Attribute>) -> Vec<ast::Attribute>>(self, f: F) -> Self {
758 Stmt { id: self.id, node: self.node.map_attrs(f), span: self.span }
762 impl HasAttrs for GenericParam {
763 fn attrs(&self) -> &[ast::Attribute] {
767 fn map_attrs<F: FnOnce(Vec<Attribute>) -> Vec<Attribute>>(mut self, f: F) -> Self {
768 self.attrs = self.attrs.map_attrs(f);
773 macro_rules! derive_has_attrs {
774 ($($ty:path),*) => { $(
775 impl HasAttrs for $ty {
776 fn attrs(&self) -> &[Attribute] {
780 fn map_attrs<F>(mut self, f: F) -> Self
781 where F: FnOnce(Vec<Attribute>) -> Vec<Attribute>,
783 self.attrs = self.attrs.map_attrs(f);
791 Item, Expr, Local, ast::ForeignItem, ast::StructField, ast::ImplItem, ast::TraitItem, ast::Arm,
792 ast::Field, ast::FieldPat, ast::Variant_
795 pub fn inject(mut krate: ast::Crate, parse_sess: &ParseSess, attrs: &[String]) -> ast::Crate {
796 for raw_attr in attrs {
797 let mut parser = parse::new_parser_from_source_str(
799 FileName::cli_crate_attr_source_code(&raw_attr),
803 let start_span = parser.span;
804 let (path, tokens) = panictry!(parser.parse_meta_item_unrestricted());
805 let end_span = parser.span;
806 if parser.token != token::Eof {
807 parse_sess.span_diagnostic
808 .span_err(start_span.to(end_span), "invalid crate attribute");
812 krate.attrs.push(Attribute {
814 style: AttrStyle::Inner,
817 is_sugared_doc: false,
818 span: start_span.to(end_span),