1 //! Functions dealing with attributes and meta items
6 cfg_matches, contains_feature_attr, eval_condition, find_crate_name, find_deprecation,
7 find_repr_attrs, find_stability, find_unwind_attr, Deprecation, InlineAttr, OptimizeAttr,
8 IntType, ReprAttr, RustcDeprecation, Stability, StabilityLevel, UnwindAttr,
12 pub use StabilityLevel::*;
15 use crate::ast::{AttrId, Attribute, AttrStyle, Name, Ident, Path, PathSegment};
16 use crate::ast::{MetaItem, MetaItemKind, NestedMetaItem};
17 use crate::ast::{Lit, LitKind, Expr, ExprKind, Item, Local, Stmt, StmtKind, GenericParam};
18 use crate::mut_visit::visit_clobber;
19 use crate::source_map::{BytePos, Spanned, dummy_spanned};
20 use crate::parse::lexer::comments::{doc_comment_style, strip_doc_comment_decoration};
21 use crate::parse::parser::Parser;
22 use crate::parse::{self, ParseSess, PResult};
23 use crate::parse::token::{self, Token};
25 use crate::symbol::{keywords, LocalInternedString, Symbol};
27 use crate::tokenstream::{TokenStream, TokenTree, DelimSpan};
31 use syntax_pos::{FileName, Span};
34 use std::ops::DerefMut;
36 pub fn mark_used(attr: &Attribute) {
37 debug!("Marking {:?} as used.", attr);
38 GLOBALS.with(|globals| {
39 globals.used_attrs.lock().insert(attr.id);
43 pub fn is_used(attr: &Attribute) -> bool {
44 GLOBALS.with(|globals| {
45 globals.used_attrs.lock().contains(attr.id)
49 pub fn mark_known(attr: &Attribute) {
50 debug!("Marking {:?} as known.", attr);
51 GLOBALS.with(|globals| {
52 globals.known_attrs.lock().insert(attr.id);
56 pub fn is_known(attr: &Attribute) -> bool {
57 GLOBALS.with(|globals| {
58 globals.known_attrs.lock().contains(attr.id)
62 pub fn is_known_lint_tool(m_item: Ident) -> bool {
63 ["clippy"].contains(&m_item.as_str().as_ref())
67 /// Returns the MetaItem if self is a NestedMetaItem::MetaItem.
68 pub fn meta_item(&self) -> Option<&MetaItem> {
70 NestedMetaItem::MetaItem(ref item) => Some(item),
75 /// Returns the Lit if self is a NestedMetaItem::Literal.
76 pub fn literal(&self) -> Option<&Lit> {
78 NestedMetaItem::Literal(ref lit) => Some(lit),
83 /// Returns `true` if this list item is a MetaItem with a name of `name`.
84 pub fn check_name<T>(&self, name: T) -> bool
88 self.meta_item().map_or(false, |meta_item| meta_item.check_name(name))
91 /// For a single-segment meta-item returns its name, otherwise returns `None`.
92 pub fn ident(&self) -> Option<Ident> {
93 self.meta_item().and_then(|meta_item| meta_item.ident())
95 pub fn name_or_empty(&self) -> LocalInternedString {
96 self.ident().unwrap_or(keywords::Invalid.ident()).name.as_str()
99 /// Gets the string value if self is a MetaItem and the MetaItem is a
100 /// MetaItemKind::NameValue variant containing a string, otherwise None.
101 pub fn value_str(&self) -> Option<Symbol> {
102 self.meta_item().and_then(|meta_item| meta_item.value_str())
105 /// Returns a name and single literal value tuple of the MetaItem.
106 pub fn name_value_literal(&self) -> Option<(Name, &Lit)> {
107 self.meta_item().and_then(
108 |meta_item| meta_item.meta_item_list().and_then(
110 if meta_item_list.len() == 1 {
111 if let Some(ident) = meta_item.ident() {
112 if let Some(lit) = meta_item_list[0].literal() {
113 return Some((ident.name, lit));
121 /// Gets a list of inner meta items from a list MetaItem type.
122 pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
123 self.meta_item().and_then(|meta_item| meta_item.meta_item_list())
126 /// Returns `true` if the variant is MetaItem.
127 pub fn is_meta_item(&self) -> bool {
128 self.meta_item().is_some()
131 /// Returns `true` if the variant is Literal.
132 pub fn is_literal(&self) -> bool {
133 self.literal().is_some()
136 /// Returns `true` if self is a MetaItem and the meta item is a word.
137 pub fn is_word(&self) -> bool {
138 self.meta_item().map_or(false, |meta_item| meta_item.is_word())
141 /// Returns `true` if self is a MetaItem and the meta item is a ValueString.
142 pub fn is_value_str(&self) -> bool {
143 self.value_str().is_some()
146 /// Returns `true` if self is a MetaItem and the meta item is a list.
147 pub fn is_meta_item_list(&self) -> bool {
148 self.meta_item_list().is_some()
153 /// Returns `true` if the attribute's path matches the argument. If it matches, then the
154 /// attribute is marked as used.
156 /// To check the attribute name without marking it used, use the `path` field directly.
157 pub fn check_name<T>(&self, name: T) -> bool
161 let matches = self.path == name;
168 /// For a single-segment attribute returns its name, otherwise returns `None`.
169 pub fn ident(&self) -> Option<Ident> {
170 if self.path.segments.len() == 1 {
171 Some(self.path.segments[0].ident)
176 pub fn name_or_empty(&self) -> LocalInternedString {
177 self.ident().unwrap_or(keywords::Invalid.ident()).name.as_str()
180 pub fn value_str(&self) -> Option<Symbol> {
181 self.meta().and_then(|meta| meta.value_str())
184 pub fn meta_item_list(&self) -> Option<Vec<NestedMetaItem>> {
186 Some(MetaItem { node: MetaItemKind::List(list), .. }) => Some(list),
191 pub fn is_word(&self) -> bool {
192 self.tokens.is_empty()
195 pub fn is_meta_item_list(&self) -> bool {
196 self.meta_item_list().is_some()
199 /// Indicates if the attribute is a Value String.
200 pub fn is_value_str(&self) -> bool {
201 self.value_str().is_some()
206 /// For a single-segment meta-item returns its name, otherwise returns `None`.
207 pub fn ident(&self) -> Option<Ident> {
208 if self.path.segments.len() == 1 {
209 Some(self.path.segments[0].ident)
214 pub fn name_or_empty(&self) -> LocalInternedString {
215 self.ident().unwrap_or(keywords::Invalid.ident()).name.as_str()
218 // #[attribute(name = "value")]
220 pub fn name_value_literal(&self) -> Option<&Lit> {
222 MetaItemKind::NameValue(v) => Some(v),
227 pub fn value_str(&self) -> Option<Symbol> {
229 MetaItemKind::NameValue(ref v) => {
231 LitKind::Str(ref s, _) => Some(*s),
239 pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]> {
241 MetaItemKind::List(ref l) => Some(&l[..]),
246 pub fn is_word(&self) -> bool {
248 MetaItemKind::Word => true,
253 pub fn check_name<T>(&self, name: T) -> bool
260 pub fn is_value_str(&self) -> bool {
261 self.value_str().is_some()
264 pub fn is_meta_item_list(&self) -> bool {
265 self.meta_item_list().is_some()
270 /// Extracts the MetaItem from inside this Attribute.
271 pub fn meta(&self) -> Option<MetaItem> {
272 let mut tokens = self.tokens.trees().peekable();
274 path: self.path.clone(),
275 node: if let Some(node) = MetaItemKind::from_tokens(&mut tokens) {
276 if tokens.peek().is_some() {
287 pub fn parse<'a, T, F>(&self, sess: &'a ParseSess, mut f: F) -> PResult<'a, T>
288 where F: FnMut(&mut Parser<'a>) -> PResult<'a, T>,
290 let mut parser = Parser::new(sess, self.tokens.clone(), None, false, false);
291 let result = f(&mut parser)?;
292 if parser.token != token::Eof {
293 parser.unexpected()?;
298 pub fn parse_list<'a, T, F>(&self, sess: &'a ParseSess, mut f: F) -> PResult<'a, Vec<T>>
299 where F: FnMut(&mut Parser<'a>) -> PResult<'a, T>,
301 if self.tokens.is_empty() {
302 return Ok(Vec::new());
304 self.parse(sess, |parser| {
305 parser.expect(&token::OpenDelim(token::Paren))?;
306 let mut list = Vec::new();
307 while !parser.eat(&token::CloseDelim(token::Paren)) {
308 list.push(f(parser)?);
309 if !parser.eat(&token::Comma) {
310 parser.expect(&token::CloseDelim(token::Paren))?;
318 pub fn parse_meta<'a>(&self, sess: &'a ParseSess) -> PResult<'a, MetaItem> {
320 path: self.path.clone(),
321 node: self.parse(sess, |parser| parser.parse_meta_item_kind())?,
326 /// Converts self to a normal #[doc="foo"] comment, if it is a
327 /// comment like `///` or `/** */`. (Returns self unchanged for
328 /// non-sugared doc attributes.)
329 pub fn with_desugared_doc<T, F>(&self, f: F) -> T where
330 F: FnOnce(&Attribute) -> T,
332 if self.is_sugared_doc {
333 let comment = self.value_str().unwrap();
334 let meta = mk_name_value_item_str(
335 Ident::from_str("doc"),
336 dummy_spanned(Symbol::intern(&strip_doc_comment_decoration(&comment.as_str()))));
337 let mut attr = if self.style == ast::AttrStyle::Outer {
338 mk_attr_outer(self.span, self.id, meta)
340 mk_attr_inner(self.span, self.id, meta)
342 attr.is_sugared_doc = true;
352 pub fn mk_name_value_item_str(ident: Ident, value: Spanned<Symbol>) -> MetaItem {
353 let node = LitKind::Str(value.node, ast::StrStyle::Cooked);
354 let (token, suffix) = node.lit_token();
355 let value = Lit { node, token, suffix, span: value.span };
356 mk_name_value_item(ident.span.to(value.span), ident, value)
359 pub fn mk_name_value_item(span: Span, ident: Ident, value: Lit) -> MetaItem {
360 MetaItem { path: Path::from_ident(ident), span, node: MetaItemKind::NameValue(value) }
363 pub fn mk_list_item(span: Span, ident: Ident, items: Vec<NestedMetaItem>) -> MetaItem {
364 MetaItem { path: Path::from_ident(ident), span, node: MetaItemKind::List(items) }
367 pub fn mk_word_item(ident: Ident) -> MetaItem {
368 MetaItem { path: Path::from_ident(ident), span: ident.span, node: MetaItemKind::Word }
371 pub fn mk_nested_word_item(ident: Ident) -> NestedMetaItem {
372 NestedMetaItem::MetaItem(mk_word_item(ident))
375 pub fn mk_attr_id() -> AttrId {
376 use std::sync::atomic::AtomicUsize;
377 use std::sync::atomic::Ordering;
379 static NEXT_ATTR_ID: AtomicUsize = AtomicUsize::new(0);
381 let id = NEXT_ATTR_ID.fetch_add(1, Ordering::SeqCst);
382 assert!(id != ::std::usize::MAX);
386 /// Returns an inner attribute with the given value.
387 pub fn mk_attr_inner(span: Span, id: AttrId, item: MetaItem) -> Attribute {
388 mk_spanned_attr_inner(span, id, item)
391 /// Returns an inner attribute with the given value and span.
392 pub fn mk_spanned_attr_inner(sp: Span, id: AttrId, item: MetaItem) -> Attribute {
395 style: ast::AttrStyle::Inner,
397 tokens: item.node.tokens(item.span),
398 is_sugared_doc: false,
403 /// Returns an outer attribute with the given value.
404 pub fn mk_attr_outer(span: Span, id: AttrId, item: MetaItem) -> Attribute {
405 mk_spanned_attr_outer(span, id, item)
408 /// Returns an outer attribute with the given value and span.
409 pub fn mk_spanned_attr_outer(sp: Span, id: AttrId, item: MetaItem) -> Attribute {
412 style: ast::AttrStyle::Outer,
414 tokens: item.node.tokens(item.span),
415 is_sugared_doc: false,
420 pub fn mk_sugared_doc_attr(id: AttrId, text: Symbol, span: Span) -> Attribute {
421 let style = doc_comment_style(&text.as_str());
422 let node = LitKind::Str(text, ast::StrStyle::Cooked);
423 let (token, suffix) = node.lit_token();
424 let lit = Lit { node, token, suffix, span };
428 path: Path::from_ident(Ident::from_str("doc").with_span_pos(span)),
429 tokens: MetaItemKind::NameValue(lit).tokens(span),
430 is_sugared_doc: true,
435 pub fn list_contains_name(items: &[NestedMetaItem], name: &str) -> bool {
436 items.iter().any(|item| {
437 item.check_name(name)
441 pub fn contains_name(attrs: &[Attribute], name: &str) -> bool {
442 attrs.iter().any(|item| {
443 item.check_name(name)
447 pub fn find_by_name<'a>(attrs: &'a [Attribute], name: &str) -> Option<&'a Attribute> {
448 attrs.iter().find(|attr| attr.check_name(name))
451 pub fn filter_by_name<'a>(attrs: &'a [Attribute], name: &'a str)
452 -> impl Iterator<Item = &'a Attribute> {
453 attrs.iter().filter(move |attr| attr.check_name(name))
456 pub fn first_attr_value_str_by_name(attrs: &[Attribute], name: &str) -> Option<Symbol> {
458 .find(|at| at.check_name(name))
459 .and_then(|at| at.value_str())
463 fn tokens(&self) -> TokenStream {
464 let mut idents = vec![];
465 let mut last_pos = BytePos(0 as u32);
466 for (i, segment) in self.path.segments.iter().enumerate() {
467 let is_first = i == 0;
469 let mod_sep_span = Span::new(last_pos,
470 segment.ident.span.lo(),
471 segment.ident.span.ctxt());
472 idents.push(TokenTree::Token(mod_sep_span, Token::ModSep).into());
474 idents.push(TokenTree::Token(segment.ident.span,
475 Token::from_ast_ident(segment.ident)).into());
476 last_pos = segment.ident.span.hi();
478 self.node.tokens(self.span).append_to_tree_and_joint_vec(&mut idents);
479 TokenStream::new(idents)
482 fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<MetaItem>
483 where I: Iterator<Item = TokenTree>,
485 // FIXME: Share code with `parse_path`.
486 let path = match tokens.next() {
487 Some(TokenTree::Token(span, token @ Token::Ident(..))) |
488 Some(TokenTree::Token(span, token @ Token::ModSep)) => 'arm: {
489 let mut segments = if let Token::Ident(ident, _) = token {
490 if let Some(TokenTree::Token(_, Token::ModSep)) = tokens.peek() {
492 vec![PathSegment::from_ident(ident.with_span_pos(span))]
494 break 'arm Path::from_ident(ident.with_span_pos(span));
497 vec![PathSegment::path_root(span)]
500 if let Some(TokenTree::Token(span,
501 Token::Ident(ident, _))) = tokens.next() {
502 segments.push(PathSegment::from_ident(ident.with_span_pos(span)));
506 if let Some(TokenTree::Token(_, Token::ModSep)) = tokens.peek() {
512 let span = span.with_hi(segments.last().unwrap().ident.span.hi());
513 Path { span, segments }
515 Some(TokenTree::Token(_, Token::Interpolated(nt))) => match *nt {
516 token::Nonterminal::NtIdent(ident, _) => Path::from_ident(ident),
517 token::Nonterminal::NtMeta(ref meta) => return Some(meta.clone()),
518 token::Nonterminal::NtPath(ref path) => path.clone(),
523 let list_closing_paren_pos = tokens.peek().map(|tt| tt.span().hi());
524 let node = MetaItemKind::from_tokens(tokens)?;
525 let hi = match node {
526 MetaItemKind::NameValue(ref lit) => lit.span.hi(),
527 MetaItemKind::List(..) => list_closing_paren_pos.unwrap_or(path.span.hi()),
530 let span = path.span.with_hi(hi);
531 Some(MetaItem { path, node, span })
536 pub fn tokens(&self, span: Span) -> TokenStream {
538 MetaItemKind::Word => TokenStream::empty(),
539 MetaItemKind::NameValue(ref lit) => {
540 let mut vec = vec![TokenTree::Token(span, Token::Eq).into()];
541 lit.tokens().append_to_tree_and_joint_vec(&mut vec);
542 TokenStream::new(vec)
544 MetaItemKind::List(ref list) => {
545 let mut tokens = Vec::new();
546 for (i, item) in list.iter().enumerate() {
548 tokens.push(TokenTree::Token(span, Token::Comma).into());
550 item.tokens().append_to_tree_and_joint_vec(&mut tokens);
552 TokenTree::Delimited(
553 DelimSpan::from_single(span),
555 TokenStream::new(tokens).into(),
561 fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<MetaItemKind>
562 where I: Iterator<Item = TokenTree>,
564 let delimited = match tokens.peek().cloned() {
565 Some(TokenTree::Token(_, token::Eq)) => {
567 return if let Some(TokenTree::Token(span, token)) = tokens.next() {
568 LitKind::from_token(token).map(|(node, token, suffix)| {
569 MetaItemKind::NameValue(Lit { node, token, suffix, span })
575 Some(TokenTree::Delimited(_, delim, ref tts)) if delim == token::Paren => {
579 _ => return Some(MetaItemKind::Word),
582 let mut tokens = delimited.into_trees().peekable();
583 let mut result = Vec::new();
584 while let Some(..) = tokens.peek() {
585 let item = NestedMetaItem::from_tokens(&mut tokens)?;
587 match tokens.next() {
588 None | Some(TokenTree::Token(_, Token::Comma)) => {}
592 Some(MetaItemKind::List(result))
596 impl NestedMetaItem {
597 pub fn span(&self) -> Span {
599 NestedMetaItem::MetaItem(ref item) => item.span,
600 NestedMetaItem::Literal(ref lit) => lit.span,
604 fn tokens(&self) -> TokenStream {
606 NestedMetaItem::MetaItem(ref item) => item.tokens(),
607 NestedMetaItem::Literal(ref lit) => lit.tokens(),
611 fn from_tokens<I>(tokens: &mut iter::Peekable<I>) -> Option<NestedMetaItem>
612 where I: Iterator<Item = TokenTree>,
614 if let Some(TokenTree::Token(span, token)) = tokens.peek().cloned() {
615 if let Some((node, token, suffix)) = LitKind::from_token(token) {
617 return Some(NestedMetaItem::Literal(Lit { node, token, suffix, span }));
621 MetaItem::from_tokens(tokens).map(NestedMetaItem::MetaItem)
626 crate fn tokens(&self) -> TokenStream {
627 TokenTree::Token(self.span, self.node.token()).into()
632 fn token(&self) -> Token {
633 match self.lit_token() {
634 (token::Bool(symbol), _) => Token::Ident(Ident::with_empty_ctxt(symbol), false),
635 (lit, suffix) => Token::Literal(lit, suffix),
639 pub fn lit_token(&self) -> (token::Lit, Option<Symbol>) {
643 LitKind::Str(string, ast::StrStyle::Cooked) => {
644 let escaped = string.as_str().escape_default().to_string();
645 (token::Lit::Str_(Symbol::intern(&escaped)), None)
647 LitKind::Str(string, ast::StrStyle::Raw(n)) => {
648 (token::Lit::StrRaw(string, n), None)
650 LitKind::ByteStr(ref bytes) => {
651 let string = bytes.iter().cloned().flat_map(ascii::escape_default)
652 .map(Into::<char>::into).collect::<String>();
653 (token::Lit::ByteStr(Symbol::intern(&string)), None)
655 LitKind::Byte(byte) => {
656 let string: String = ascii::escape_default(byte).map(Into::<char>::into).collect();
657 (token::Lit::Byte(Symbol::intern(&string)), None)
659 LitKind::Char(ch) => {
660 let string: String = ch.escape_default().map(Into::<char>::into).collect();
661 (token::Lit::Char(Symbol::intern(&string)), None)
663 LitKind::Int(n, ty) => {
664 let suffix = match ty {
665 ast::LitIntType::Unsigned(ty) => Some(Symbol::intern(ty.ty_to_string())),
666 ast::LitIntType::Signed(ty) => Some(Symbol::intern(ty.ty_to_string())),
667 ast::LitIntType::Unsuffixed => None,
669 (token::Lit::Integer(Symbol::intern(&n.to_string())), suffix)
671 LitKind::Float(symbol, ty) => {
672 (token::Lit::Float(symbol), Some(Symbol::intern(ty.ty_to_string())))
674 LitKind::FloatUnsuffixed(symbol) => (token::Lit::Float(symbol), None),
675 LitKind::Bool(value) => {
676 let kw = if value { keywords::True } else { keywords::False };
677 (token::Lit::Bool(kw.name()), None)
679 LitKind::Err(val) => (token::Lit::Err(val), None),
683 fn from_token(token: Token) -> Option<(LitKind, token::Lit, Option<Symbol>)> {
685 Token::Ident(ident, false) if ident.name == keywords::True.name() =>
686 Some((LitKind::Bool(true), token::Bool(ident.name), None)),
687 Token::Ident(ident, false) if ident.name == keywords::False.name() =>
688 Some((LitKind::Bool(false), token::Bool(ident.name), None)),
689 Token::Interpolated(nt) => match *nt {
690 token::NtExpr(ref v) | token::NtLiteral(ref v) => match v.node {
691 ExprKind::Lit(ref lit) => Some((lit.node.clone(), lit.token, lit.suffix)),
696 Token::Literal(lit, suf) => {
697 let (suffix_illegal, result) = parse::lit_token(lit, suf, None);
698 if result.is_none() || suffix_illegal && suf.is_some() {
701 Some((result.unwrap(), lit, suf))
708 pub trait HasAttrs: Sized {
709 fn attrs(&self) -> &[ast::Attribute];
710 fn visit_attrs<F: FnOnce(&mut Vec<ast::Attribute>)>(&mut self, f: F);
713 impl<T: HasAttrs> HasAttrs for Spanned<T> {
714 fn attrs(&self) -> &[ast::Attribute] { self.node.attrs() }
715 fn visit_attrs<F: FnOnce(&mut Vec<ast::Attribute>)>(&mut self, f: F) {
716 self.node.visit_attrs(f);
720 impl HasAttrs for Vec<Attribute> {
721 fn attrs(&self) -> &[Attribute] {
724 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
729 impl HasAttrs for ThinVec<Attribute> {
730 fn attrs(&self) -> &[Attribute] {
733 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
734 visit_clobber(self, |this| {
735 let mut vec = this.into();
742 impl<T: HasAttrs + 'static> HasAttrs for P<T> {
743 fn attrs(&self) -> &[Attribute] {
746 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
747 (**self).visit_attrs(f);
751 impl HasAttrs for StmtKind {
752 fn attrs(&self) -> &[Attribute] {
754 StmtKind::Local(ref local) => local.attrs(),
755 StmtKind::Item(..) => &[],
756 StmtKind::Expr(ref expr) | StmtKind::Semi(ref expr) => expr.attrs(),
757 StmtKind::Mac(ref mac) => {
758 let (_, _, ref attrs) = **mac;
764 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
766 StmtKind::Local(local) => local.visit_attrs(f),
767 StmtKind::Item(..) => {}
768 StmtKind::Expr(expr) => expr.visit_attrs(f),
769 StmtKind::Semi(expr) => expr.visit_attrs(f),
770 StmtKind::Mac(mac) => {
771 let (_mac, _style, attrs) = mac.deref_mut();
772 attrs.visit_attrs(f);
778 impl HasAttrs for Stmt {
779 fn attrs(&self) -> &[ast::Attribute] {
783 fn visit_attrs<F: FnOnce(&mut Vec<ast::Attribute>)>(&mut self, f: F) {
784 self.node.visit_attrs(f);
788 impl HasAttrs for GenericParam {
789 fn attrs(&self) -> &[ast::Attribute] {
793 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
794 self.attrs.visit_attrs(f);
798 macro_rules! derive_has_attrs {
799 ($($ty:path),*) => { $(
800 impl HasAttrs for $ty {
801 fn attrs(&self) -> &[Attribute] {
805 fn visit_attrs<F: FnOnce(&mut Vec<Attribute>)>(&mut self, f: F) {
806 self.attrs.visit_attrs(f);
813 Item, Expr, Local, ast::ForeignItem, ast::StructField, ast::ImplItem, ast::TraitItem, ast::Arm,
814 ast::Field, ast::FieldPat, ast::Variant_
817 pub fn inject(mut krate: ast::Crate, parse_sess: &ParseSess, attrs: &[String]) -> ast::Crate {
818 for raw_attr in attrs {
819 let mut parser = parse::new_parser_from_source_str(
821 FileName::cli_crate_attr_source_code(&raw_attr),
825 let start_span = parser.span;
826 let (path, tokens) = panictry!(parser.parse_meta_item_unrestricted());
827 let end_span = parser.span;
828 if parser.token != token::Eof {
829 parse_sess.span_diagnostic
830 .span_err(start_span.to(end_span), "invalid crate attribute");
834 krate.attrs.push(Attribute {
836 style: AttrStyle::Inner,
839 is_sugared_doc: false,
840 span: start_span.to(end_span),