1 files changed, 9 insertions, 3 deletions
diff --git a/src/librustc_parse/parser/mod.rs b/src/librustc_parse/parser/mod.rs
index e1461dbb8e7..bccf5968118 100644
--- a/src/librustc_parse/parser/mod.rs
+++ b/src/librustc_parse/parser/mod.rs
@@ -22,7 +22,8 @@ use rustc_session::parse::ParseSess;
 use rustc_span::source_map::respan;
 use rustc_span::symbol::{kw, sym, Symbol};
 use rustc_span::{FileName, Span, DUMMY_SP};
-use syntax::ast::{self, AttrStyle, AttrVec, CrateSugar, Extern, Ident, Unsafety, DUMMY_NODE_ID};
+use syntax::ast::DUMMY_NODE_ID;
+use syntax::ast::{self, AttrStyle, AttrVec, Const, CrateSugar, Extern, Ident, Unsafe};
 use syntax::ast::{IsAsync, MacArgs, MacDelimiter, Mutability, StrLit, Visibility, VisibilityKind};
 use syntax::ptr::P;
 use syntax::token::{self, DelimToken, Token, TokenKind};
@@ -962,8 +963,13 @@ impl<'a> Parser<'a> {
     }
 
     /// Parses unsafety: `unsafe` or nothing.
-    fn parse_unsafety(&mut self) -> Unsafety {
-        if self.eat_keyword(kw::Unsafe) { Unsafety::Unsafe } else { Unsafety::Normal }
+    fn parse_unsafety(&mut self) -> Unsafe {
+        if self.eat_keyword(kw::Unsafe) { Unsafe::Yes(self.prev_span) } else { Unsafe::No }
+    }
+
+    /// Parses constness: `const` or nothing.
+    fn parse_constness(&mut self) -> Const {
+        if self.eat_keyword(kw::Const) { Const::Yes(self.prev_span) } else { Const::No }
     }
 
     /// Parses mutability (`mut` or nothing).