1 files changed, 20 insertions, 1 deletions
diff --git a/src/libsyntax/parse/parser.rs b/src/libsyntax/parse/parser.rs
index c143e190c6f..1b32632a06f 100644
--- a/src/libsyntax/parse/parser.rs
+++ b/src/libsyntax/parse/parser.rs
@@ -1051,7 +1051,7 @@ impl<'a> Parser<'a> {
     pub fn parse_for_in_type(&mut self) -> PResult<'a, TyKind> {
         /*
         Parses whatever can come after a `for` keyword in a type.
-        The `for` has already been consumed.
+        The `for` hasn't been consumed.
 
         Deprecated:
 
@@ -1091,6 +1091,23 @@ impl<'a> Parser<'a> {
         }
     }
 
+    pub fn parse_impl_trait_type(&mut self) -> PResult<'a, TyKind> {
+        /*
+        Parses whatever can come after a `impl` keyword in a type.
+        The `impl` has already been consumed.
+        */
+
+        let bounds = self.parse_ty_param_bounds(BoundParsingMode::Modified)?;
+
+        if !bounds.iter().any(|b| if let TraitTyParamBound(..) = *b { true } else { false }) {
+            let last_span = self.last_span;
+            self.span_err(last_span, "at least one trait must be specified");
+        }
+
+        Ok(ast::TyKind::ImplTrait(bounds))
+    }
+
+
     pub fn parse_ty_path(&mut self) -> PResult<'a, TyKind> {
         Ok(TyKind::Path(None, self.parse_path(PathStyle::Type)?))
     }
@@ -1406,6 +1423,8 @@ impl<'a> Parser<'a> {
             self.parse_borrowed_pointee()?
         } else if self.check_keyword(keywords::For) {
             self.parse_for_in_type()?
+        } else if self.eat_keyword(keywords::Impl) {
+            self.parse_impl_trait_type()?
         } else if self.token_is_bare_fn_keyword() {
             // BARE FUNCTION
             self.parse_ty_bare_fn(Vec::new())?