syntax: parse outer attributes in quote_item! calls.

Fixes #14857.

Author: huonw

src/libsyntax/ext/quote.rs

@@ -358,9 +358,8 @@ pub fn expand_quote_item(cx: &mut ExtCtxt,
                          sp: Span,
                          tts: &[ast::TokenTree])
                          -> Box<base::MacResult> {
-    let e_attrs = cx.expr_vec_ng(sp);
-    let expanded = expand_parse_call(cx, sp, "parse_item",
-                                    vec!(e_attrs), tts);
+    let expanded = expand_parse_call(cx, sp, "parse_item_with_outer_attributes",
+                                    vec!(), tts);
     base::MacExpr::new(expanded)
 }
 

src/libsyntax/ext/tt/macro_rules.rs

@@ -73,8 +73,7 @@ impl<'a> MacResult for ParserAnyMacro<'a> {
         let mut ret = SmallVector::zero();
         loop {
             let mut parser = self.parser.borrow_mut();
-            let attrs = parser.parse_outer_attributes();
-            match parser.parse_item(attrs) {
+            match parser.parse_item_with_outer_attributes() {
                 Some(item) => ret.push(item),
                 None => break
             }

src/libsyntax/parse/mod.rs

@@ -117,8 +117,7 @@ pub fn parse_item_from_source_str(name: String,
                                   sess: &ParseSess)
                                   -> Option<Gc<ast::Item>> {
     let mut p = new_parser_from_source_str(sess, cfg, name, source);
-    let attrs = p.parse_outer_attributes();
-    maybe_aborted(p.parse_item(attrs),p)
+    maybe_aborted(p.parse_item_with_outer_attributes(),p)
 }
 
 pub fn parse_meta_from_source_str(name: String,

src/libsyntax/parse/parser.rs

@@ -4965,6 +4965,11 @@ impl<'a> Parser<'a> {
         return IoviNone(attrs);
     }
 
+    pub fn parse_item_with_outer_attributes(&mut self) -> Option<Gc<Item>> {
+        let attrs = self.parse_outer_attributes();
+        self.parse_item(attrs)
+    }
+
     pub fn parse_item(&mut self, attrs: Vec<Attribute> ) -> Option<Gc<Item>> {
         match self.parse_item_or_view_item(attrs, true) {
             IoviNone(_) => None,

src/test/run-pass-fulldeps/quote-tokens.rs

@@ -28,6 +28,9 @@ fn syntax_extension(cx: &ExtCtxt) {
     let _f: @syntax::ast::Expr = quote_expr!(cx, ());
     let _g: @syntax::ast::Expr = quote_expr!(cx, true);
     let _h: @syntax::ast::Expr = quote_expr!(cx, 'a');
+
+    let i: Option<@syntax::ast::Item> = quote_item!(cx, #[deriving(Eq)] struct Foo; );
+    assert!(i.is_some());
 }
 
 fn main() {