self.token.is_keyword(keywords::Extern) && self.look_ahead(1, |t| t != &token::ModSep)
}
+ fn is_existential_type_decl(&self) -> bool {
+ self.token.is_keyword(keywords::Existential) &&
+ self.look_ahead(1, |t| t.is_keyword(keywords::Type))
+ }
+
fn is_auto_trait_item(&mut self) -> bool {
// auto trait
(self.token.is_keyword(keywords::Auto)
!self.is_union_item() &&
!self.is_crate_vis() &&
!self.is_extern_non_path() &&
+ !self.is_existential_type_decl() &&
!self.is_auto_trait_item() {
let pth = self.parse_path(PathStyle::Expr)?;
--- /dev/null
+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// compile-pass
+
+#![feature(existential_type)]
+
+use std::fmt::Debug;
+
+fn main() {
+ existential type Existential: Debug;
+
+ fn f() -> Existential {}
+ println!("{:?}", f());
+}