Merge pull request #1189 from Pursuit92/master

Quick fix for "impl Trait"

src/types.rs

@@ -618,9 +618,8 @@ fn rewrite(&self, context: &RewriteContext, width: usize, offset: Indent) -> Opt
             ast::TyKind::Mac(..) |
             ast::TyKind::Typeof(..) => unreachable!(),
             ast::TyKind::ImplicitSelf => Some(String::from("")),
-            ast::TyKind::ImplTrait(..) => {
-                // FIXME(#1154) Implement impl Trait
-                Some(String::from("impl TODO"))
+            ast::TyKind::ImplTrait(ref it) => {
+                it.rewrite(context, width, offset).map(|it_str| format!("impl {}", it_str))
             }
         }
     }

tests/source/type.rs

@@ -14,3 +14,7 @@ struct F {
 }
 
 fn issue_1006(def_id_to_string: for<'a, 'b> unsafe fn(TyCtxt<'b, 'tcx, 'tcx>, DefId) -> String) {}
+
+fn impl_trait_fn_1() -> impl Fn(i32) -> Option<u8> {}
+
+fn impl_trait_fn_2<E>() -> impl Future<Item=&'a i64,Error=E> {}

tests/target/type.rs

@@ -23,3 +23,7 @@ struct F {
 }
 
 fn issue_1006(def_id_to_string: for<'a, 'b> unsafe fn(TyCtxt<'b, 'tcx, 'tcx>, DefId) -> String) {}
+
+fn impl_trait_fn_1() -> impl Fn(i32) -> Option<u8> {}
+
+fn impl_trait_fn_2<E>() -> impl Future<Item = &'a i64, Error = E> {}